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description Publicationkeyboard_double_arrow_right Article 2022 Switzerland, United States, ChilePublisher:Springer Science and Business Media LLC Funded by:SNSF | VTS: Verbal tenses and su..., SNSF | Elucidating the Eco-Evolu...SNSF| VTS: Verbal tenses and subjectivity: an empirical cognitive approach ,SNSF| Elucidating the Eco-Evolutionary Mechanisms Shaping the Genomic Landscape of IntrogressionAuthors: Claudio S. Quilodrán; Erik M. Sandvig; Francisco Aguirre; Juan Rivero de Aguilar; +3 AuthorsClaudio S. Quilodrán; Erik M. Sandvig; Francisco Aguirre; Juan Rivero de Aguilar; Omar Barroso; Rodrigo A. Vásquez; Ricardo Rozzi;AbstractA natural laboratory is a place supporting the conditions for hypothesis testing under non-anthropogenic settings. Located at the southern end of the Magellanic sub-Antarctic ecoregion in southwestern South America, the Cape Horn Biosphere Reserve (CHBR) has one of the most extreme rainfall gradients in the world. Subject to oceanic climate conditions, it is also characterized by moderate thermal fluctuations throughout the year. This makes it a unique natural laboratory for studying the effects of extreme rainfall variations on forest bird communities. Here, we monitor the bird species richness in the different forest types present in the CHBR. We found that species richness decreased with increasing precipitation, in which an increase of 100 mm in average annual precipitation showed about 1% decrease in species richness. Similar patterns were found among different forest types within the CHBR. These results provide a baseline to investigate the interactions between physical and biotic factors in a subpolar region that climatically contrasts with boreal forests, which is subject to continental climatic conditions. This research highlights the importance of ecological and ornithological long-term studies in the CHBR, which can contribute both to a higher resolution of the heterogeneity of climate changes in different regions of the world, and to orient conservation policies in the Magellanic sub-Antarctic ecoregion in the face of growing development pressures.
Universidad de Chile... arrow_drop_down Universidad de Chile: Repositorio académicoArticle . 2022License: CC BY NC NDData sources: Bielefeld Academic Search Engine (BASE)University of North Texas: UNT Digital LibraryArticle . 2022Data sources: Bielefeld Academic Search Engine (BASE)add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess Routeshybrid 2 citations 2 popularity Top 10% influence Average impulse Average Powered by BIP!
more_vert Universidad de Chile... arrow_drop_down Universidad de Chile: Repositorio académicoArticle . 2022License: CC BY NC NDData sources: Bielefeld Academic Search Engine (BASE)University of North Texas: UNT Digital LibraryArticle . 2022Data sources: Bielefeld Academic Search Engine (BASE)add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Other literature type , Journal 2010 United StatesPublisher:Public Library of Science (PLoS) Funded by:NSF | `MO: Exploring the Symbio..., NSF | Genome Sequencing of Mutu..., NSF | CAREER: Exploring Mutuali...NSF| `MO: Exploring the Symbiotic Association Between Tropical Social Insects and Actinomycetes ,NSF| Genome Sequencing of Mutualistic Bacteria Associated With Fungus-growing Ants ,NSF| CAREER: Exploring Mutualism Stability in a Community ContextAuthors: Timothy T. Harkins; Timothy J. Donohue; Timothy J. Donohue; Susannah G. Tringe; +24 AuthorsTimothy T. Harkins; Timothy J. Donohue; Timothy J. Donohue; Susannah G. Tringe; Clifton E. Foster; Clifton E. Foster; Jarrod J. Scott; Jarrod J. Scott; Jarrod J. Scott; Cameron R. Currie; Cameron R. Currie; Cameron R. Currie; Frank O. Aylward; Frank O. Aylward; Steven C. Slater; Lewyn Li; Adrián A. Pinto-Tomás; Paul J. Weimer; Lynne Goodwin; Lynne Goodwin; Markus Pauly; Markus Pauly; Pascal Bouffard; Sandra M. Adams; Sandra M. Adams; Kerrie Barry; Garret Suen; Jolene Osterberger;Les herbivores peuvent avoir un accès indirect au carbone récalcitrant présent dans les parois des cellules végétales grâce à des associations symbiotiques avec des microbes lignocellulolytiques. Un exemple paradigmatique est la fourmi coupeuse de feuilles (Tribu : Attini), qui utilise des feuilles fraîches pour cultiver un champignon pour se nourrir dans des jardins spécialisés. En utilisant une combinaison d'analyses de la composition du sucre, de la métagénomique et du séquençage du génome entier, nous révélons que le microbiome du champignon de jardin des fourmis coupeuses de feuilles est composé d'une communauté diversifiée de bactéries ayant une capacité élevée de dégradation de la biomasse végétale. La comparaison du profil enzymatique prédit de dégradation des glucides de ce microbiome avec d'autres métagénomes montre une similitude plus étroite avec le rumen bovin, indiquant une convergence évolutive du potentiel de dégradation de la biomasse végétale entre deux animaux herbivores importants. La caractérisation génomique et physiologique de deux bactéries dominantes dans le microbiome fongique du jardin fournit des preuves de leur capacité à dégrader la cellulose. Compte tenu de l'intérêt récent pour les biocarburants cellulosiques, comprendre comment la dégradation rapide et à grande échelle de la biomasse végétale se produit chez un insecte herbivore très évolué est particulièrement important pour la bioénergie. Los herbívoros pueden obtener acceso indirecto al carbono recalcitrante presente en las paredes celulares de las plantas a través de asociaciones simbióticas con microbios lignocelulolíticos. Un ejemplo paradigmático es la hormiga cortadora de hojas (Tribu: Attini), que utiliza hojas frescas para cultivar un hongo como alimento en jardines especializados. Usando una combinación de análisis de composición de azúcar, metagenómica y secuenciación del genoma completo, revelamos que el microbioma del jardín de hongos de las hormigas cortadoras de hojas está compuesto por una comunidad diversa de bacterias con alta capacidad de degradación de la biomasa vegetal. La comparación del perfil enzimático de degradación de carbohidratos predicho de este microbioma con otros metagenomas muestra la mayor similitud con el rumen bovino, lo que indica una convergencia evolutiva del potencial de degradación de la biomasa vegetal entre dos animales herbívoros importantes. La caracterización genómica y fisiológica de dos bacterias dominantes en el microbioma del jardín de hongos proporciona evidencia de su capacidad para degradar la celulosa. Dado el reciente interés en los biocombustibles celulósicos, la comprensión de cómo se produce la degradación rápida y a gran escala de la biomasa vegetal en un insecto herbívoro altamente evolucionado es de particular relevancia para la bioenergía. Herbivores can gain indirect access to recalcitrant carbon present in plant cell walls through symbiotic associations with lignocellulolytic microbes. A paradigmatic example is the leaf-cutter ant (Tribe: Attini), which uses fresh leaves to cultivate a fungus for food in specialized gardens. Using a combination of sugar composition analyses, metagenomics, and whole-genome sequencing, we reveal that the fungus garden microbiome of leaf-cutter ants is composed of a diverse community of bacteria with high plant biomass-degrading capacity. Comparison of this microbiome's predicted carbohydrate-degrading enzyme profile with other metagenomes shows closest similarity to the bovine rumen, indicating evolutionary convergence of plant biomass degrading potential between two important herbivorous animals. Genomic and physiological characterization of two dominant bacteria in the fungus garden microbiome provides evidence of their capacity to degrade cellulose. Given the recent interest in cellulosic biofuels, understanding how large-scale and rapid plant biomass degradation occurs in a highly evolved insect herbivore is of particular relevance for bioenergy. يمكن للحيوانات العاشبة الوصول بشكل غير مباشر إلى الكربون المتمرد الموجود في جدران الخلايا النباتية من خلال الارتباطات التكافلية مع الميكروبات المحللة للخلايا. ومن الأمثلة النموذجية على ذلك نملة قطع الأوراق (القبيلة: أتيني)، التي تستخدم أوراقًا طازجة لزراعة فطر للطعام في الحدائق المتخصصة. باستخدام مزيج من تحليلات تركيبة السكر، وعلم الوراثة، وتسلسل الجينوم الكامل، نكشف أن ميكروبيوم حديقة الفطريات من النمل القاطع للأوراق يتكون من مجموعة متنوعة من البكتيريا ذات القدرة العالية على تحلل الكتلة الحيوية للنبات. تُظهر مقارنة ملف تعريف إنزيم تحلل الكربوهيدرات المتوقع لهذا الميكروبيوم مع الميتاجينومات الأخرى أقرب تشابه مع الكرش البقري، مما يشير إلى التقارب التطوري لإمكانات تحلل الكتلة الحيوية النباتية بين اثنين من الحيوانات العاشبة المهمة. يوفر التوصيف الجيني والفسيولوجي لبكتيريا مهيمنة في ميكروبيوم حديقة الفطريات دليلاً على قدرتها على تحلل السليلوز. بالنظر إلى الاهتمام الأخير بالوقود الحيوي السليولوزي، فإن فهم كيفية حدوث تدهور الكتلة الحيوية النباتية على نطاق واسع وسريع في الحيوانات العاشبة الحشرية المتطورة للغاية له أهمية خاصة بالنسبة للطاقة الحيوية.
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For further information contact us at helpdesk@openaire.euAccess RoutesGreen gold 207 citations 207 popularity Top 1% influence Top 10% impulse Top 1% Powered by BIP!
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Report , Other literature type 1984 United StatesPublisher:Office of Scientific and Technical Information (OSTI) Authors: Oliver, R.L.; Youngberg, A.D.;doi: 10.2172/5237516
The Hanna Underground Coal Gasification (UCG) study area consists of the SW1/4 of Section 29 and the E1/2SE1/4 of Section 30 in Township 22 North, Range 81 West, Wyoming. Regionally, this is located in the coal-bearing Hanna Syncline of the Hanna Basin in southeast Wyoming. The structure of the site is characterized by beds dipping gently to the northeast. An east-west fault graben complex interrupts this basic trend in the center of the area. The target coal bed of the UCG experiments was the Hanna No. 1 coal in the Hanna Formation. Sedimentary rocks comprising the Hanna Formation consist of a sequence of nonmarine shales, sandstones, coals and conglomerates. The overburden of the Hanna No. 1 coal bed at the Hanna UCG site was divided into four broad local stratigraphic units. Analytical studies were made on overburden and coal samples taken from cores to determine their mineralogical composition. Textural and mineralogical characteristics of sandstones from local stratigraphic units A, B, and C were analyzed and compared. Petrographic analyses were done on the coal including oxides, forms of sulfur, pyrite types, maceral composition, and coal rank. Semi-quantitative spectrographic and analytic geochemical analyses were done on the overburden and coal and relativemore » element concentrations were compared. Trends within each stratigraphic unit were also presented and related to depositional environments. The spectrographic analysis was also done by lithotype. 34 references, 60 figures, 18 tables.« less
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For further information contact us at helpdesk@openaire.eu2 citations 2 popularity Average influence Average impulse Average Powered by BIP!
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Other literature type 2023 United KingdomPublisher:Informa UK Limited Funded by:UKRI | Can tropical Montane fore...UKRI| Can tropical Montane forest Acclimate to high temperature? Montane-AcclimLászló Nagy; Cleiton B. Eller; Lina M. Mercado; Francisco Cuesta; Luis Daniel Llambí; Erika Buscardo; Luiz E. O. C. Aragão; Carlos García‐Núñez; Rafael S. Oliveira; Milton Barbosa; Sergio Javier Ceballos; Marco Calderón-Loor; Geraldo Wilson Fernandes; Ezequiel Aráoz; Ariadna M. Q. Muñoz; Ricardo Rozzi; Francisco Aguirre; Esteban Álvarez-Dávila; Norma Salinas; Stephen Sitch;Contexte : La surveillance basée sur des placettes a fourni de nombreuses informations sur la diversité taxonomique et le stockage du carbone (C) dans les forêts tropicales de plaine du bassin amazonien. Cela a permis de mieux comprendre la relation entre la dynamique de la biomasse forestière des plaines et les facteurs du changement mondial, tels que le changement climatique et la concentration atmosphérique de CO 2. Beaucoup moins d'attention a été accordée aux écosystèmes montagneux d'Amérique du Sud qui comprennent les forêts montagnardes et la végétation alpine (páramo, puna, prairies des hautes Andes, zones humides et bruyère alpine).Ce complexe de végétation fournit une variété de services écosystémiques et forme un laboratoire naturel le long de divers gradients d'histoire/biogéographie physiographique, géologique et évolutive, et d'histoire de l'utilisation des terres.Images : Ici, nous passons en revue la compréhension empirique existante et les approches basées sur des modèles pour quantifier la contribution des écosystèmes de montagne à la fourniture de services écosystémiques dans le contexte socio-écologique en évolution rapide des montagnes sud-américaines.L' objectif de cet article est de définir une feuille de route générale pour la mise en œuvre de la végétation de montagne dans des modèles dynamiques de végétation mondiale (DGVM) à utiliser dans les modèles du système terrestre (ESM), sur la base de notre compréhension actuelle de leur structure et de leur fonction et de leur réactivité aux facteurs du changement global.Nous identifions également les processus de la limite des arbres, critiques dans les écosystèmes de montagne, comme des éléments manquants clés dans les DGVM/mes, et explorons ainsi en outre un modèle de limite des arbres.Méthodes : Un bilan de la disponibilité des données empiriques a été entrepris à partir de huit sites de recherche le long des Andes et dans le sud-est du Brésil.Parmi huit sites, deux (un au Venezuela et un au Brésil) avaient potentiellement des données climatiques, écologiques et écophysiologiques convenant au paramétrage d'une DGVM.Les données sur la biomasse des arbres étaient disponibles pour six sites.Une évaluation préliminaire de la DGVM du Joint UK Land Environment Simulator (JULES) a été réalisée pour identifier les lacunes dans les données disponibles et leurs impacts sur le paramétrage et l'étalonnage du modèle.En outre, l'élévation potentielle de la limite des arbres déterminée par le climat a été modélisée pour vérifier la DGVM quant à sa capacité à identifier la transition entre la forêt montagnarde et la végétation alpine.Résultats : Les résultats de l'évaluation du modèle de surface terrestre JULES ont identifié les processus clés suivants dans les forêts montagnardes : diminution liée à la température de la production primaire nette, respiration et allocation à la biomasse aérienne et augmentation des stocks de C dans le sol avec l'altitude.Il y avait un accord variable entre la biomasse simulée et celles dérivées des mesures sur le terrain via des équations allométriques.Conclusions : Nous avons identifié des écarts majeurs entre la disponibilité des données et les besoins de modélisation basée sur les processus de la végétation de montagne sud-américaine et de sa dynamique dans les DGVM.Pour combler cet écart, nous proposons un réseau transdisciplinaire, composé de membres des communautés théoriques/de modélisation et scientifiques empiriques, pour étudier la dynamique naturelle des écosystèmes de montagne et leurs réponses aux facteurs de changement mondiaux au niveau local, régional et continental, dans un cadre de système socio-écologique.Les travaux présentés ici constituent la base de la conception de la collecte de données à partir des mesures sur le terrain et des stations de surveillance instrumentales pour paramétrer et vérifier les DGVM.Le réseau est conçu pour collaborer et compléter les recherches à long terme existantes Antecedentes: El monitoreo basado en parcelas ha arrojado mucha información sobre la diversidad taxonómica y el almacenamiento de carbono (C) en los bosques tropicales de tierras bajas de la cuenca amazónica. Esto ha resultado en una mejor comprensión de la relación entre la dinámica de la biomasa forestal de las tierras bajas y los impulsores del cambio global, como el cambio climático y la concentración atmosférica de CO 2. Se ha prestado mucha menos atención a los ecosistemas de montaña de América del Sur que comprenden bosques montanos y vegetación alpina (páramo, puna, pastizales altoandinos, humedales y brezales alpinos).Este complejo de vegetación proporciona una variedad de servicios ecosistémicos y forma un laboratorio natural a lo largo de varios gradientes fisiográficos, geológicos y evolutivos de historia/biogeografía e historia del uso de la tierra. Objetivos: Aquí, revisamos la comprensión empírica existente y los enfoques basados en modelos para cuantificar la contribución de los ecosistemas de montaña a la prestación de servicios ecosistémicos en el entorno socioecológico rápidamente cambiante de las montañas sudamericanas. El objetivo de este documento es esbozar una amplia hoja de ruta para la implementación de la vegetación de montaña en modelos dinámicos de vegetación global (DGVM) para su uso en Modelos del Sistema Terrestre (ESM), basados en nuestra comprensión actual de su estructura y función y de su capacidad de respuesta a los impulsores del cambio global. También identificamos los procesos arbóreos, críticos en los ecosistemas de montaña, como elementos clave que faltan en las DGVM/ESM, y por lo tanto exploramos además un modelo arbóreo. Métodos: Se realizó un inventario de la disponibilidad de datos empíricos de ocho sitios de investigación a lo largo de los Andes y en el sureste de Brasil. De los ocho sitios, dos (uno en Venezuela y otro en Brasil) tenían algunos datos climáticos, ecológicos y ecofisiológicos potencialmente adecuado para parametrizar una DGVM. Se disponía de datos de biomasa de árboles para seis sitios. Se realizó una evaluación preliminar de la DGVM del Simulador Conjunto de Medio Ambiente Terrestre del Reino Unido (JULES) para identificar lagunas en los datos disponibles y sus impactos en la parametrización y calibración del modelo. Además, se modeló la posible elevación determinada por el clima de la línea de árboles para verificar la DGVM en cuanto a su capacidad para identificar la transición entre el bosque montano y la vegetación alpina. Resultados: Los resultados de la evaluación del modelo de superficie terrestre de JULES identificaron los siguientes procesos clave en los bosques montanos: disminución relacionada con la temperatura en la producción primaria neta, la respiración y la asignación a la biomasa sobre el suelo y aumento de las poblaciones de suelo C con elevación. Hubo un acuerdo variable entre la biomasa simulada y las derivadas de las mediciones de campo a través de ecuaciones alométricas. Conclusiones: Identificamos grandes brechas entre la disponibilidad de datos y las necesidades de modelado basado en procesos de la vegetación de montaña sudamericana y su dinámica en las DGVM. Para cerrar esta brecha, proponemos una red transdisciplinaria, compuesta por miembros de las comunidades científicas teóricas/de modelado y empíricas, para estudiar la dinámica natural de los ecosistemas de montaña y sus respuestas a los impulsores del cambio global a nivel local, regional y continental, dentro de un marco de sistema socioecológico. El trabajo presentado aquí forma la base para el diseño de la recopilación de datos a partir de mediciones de campo y estaciones de monitoreo instrumental para parametrizar y verificar las DGVM. La red está diseñada para colaborar y complementar la investigación existente a largo plazo. Background: Plot-based monitoring has yielded much information on the taxonomic diversity and carbon (C) storage in tropical lowland forests of the Amazon basin.This has resulted in an improved understanding of the relationship between lowland forest biomass dynamics and global change drivers, such as climate change and atmospheric CO 2 concentration.Much less attention has been paid to the mountain ecosystems of South America that comprise montane forests and alpine vegetation (páramo, puna, high Andean grasslands, wetlands, and alpine heath).This vegetation complex provides a variety of ecosystem services and forms a natural laboratory along various physiographic, geological and evolutionary history/biogeography, and land use history gradients.Aims: Here, we review existing empirical understanding and model-based approaches to quantify the contribution of mountain ecosystems to ecosystem service provision in the rapidly changing socioecological setting of the South American mountains.The objective of this paper is to outline a broad road map for the implementation of mountain vegetation into dynamic global vegetation models (DGVM) for use in Earth System Models (ESM), based on our current understanding of their structure and function and of their responsiveness to global change drivers.We also identify treeline processes, critical in mountain ecosystems, as key missing elements in DGVMs/ESMs, and thus explore in addition a treeline model.Methods: Stocktaking of the availability of empirical data was undertaken from eight research sites along the Andes and in south-eastern Brazil.Out of eight sites, two (one each in Venezuela and Brazil) had some climate, ecological and ecophysiological data potentially suitable to parametrise a DGVM.Tree biomass data were available for six sites.A preliminary assessment of the Joint UK Land Environment Simulator (JULES) DGVM was made to identify gaps in available data and their impacts on model parametrisation and calibration.Additionally, the potential climate-determined elevation of the treeline was modelled to check the DGVM for its ability to identify the transition between the montane forest and alpine vegetation.Results: Outcomes of the evaluation of the JULES land surface model identified the following key processes in montane forests: temperature-related decrease in net primary production, respiration, and allocation to above-ground biomass and increase in soil C stocks with elevation.There was a variable agreement between simulated biomass and those derived from field measurements via allometric equations.Conclusions: We identified major gaps between data availability and the needs for process-based modelling of South American mountain vegetation and its dynamics in DGVMs.To bridge this gap, we propose a transdisciplinary network, composed of members of the theoretical/modelling and empirical scientific communities, to study the natural dynamics of mountain ecosystems and their responses to global change drivers locally, regionally and at the continental scale, within a social-ecological system framework.The work presented here forms the basis for the design of data collection from field measurements and instrumental monitoring stations to parametrise and verify DGVMs.The network is designed to collaborate with and complement existing long-term research معلومات أساسية: أسفر الرصد القائم على قطعة الأرض عن الكثير من المعلومات حول التنوع التصنيفي وتخزين الكربون (C) في غابات الأراضي المنخفضة الاستوائية في حوض الأمازون. وقد أدى ذلك إلى فهم أفضل للعلاقة بين ديناميات الكتلة الحيوية للغابات المنخفضة ومحركات التغير العالمي، مثل تغير المناخ وتركيز ثاني أكسيد الكربون في الغلاف الجوي. وقد تم إيلاء اهتمام أقل بكثير للنظم الإيكولوجية الجبلية في أمريكا الجنوبية التي تشمل الغابات الجبلية والغطاء النباتي في جبال الألب (بارامو، بونا، الأراضي العشبية في أعالي الأنديز، الأراضي الرطبة، وصحة جبال الألب). يوفر مجمع الغطاء النباتي هذا مجموعة متنوعة من خدمات النظام الإيكولوجي ويشكل مختبرًا طبيعيًا على طول مختلف التاريخ الفيزيائي والجيولوجي والتطوري/الجغرافيا الحيوية، وتدرجات تاريخ استخدام الأراضي. الأهداف: نستعرض هنا الفهم التجريبي الحالي والنهج القائمة على النماذج لقياس مساهمة النظم الإيكولوجية الجبلية في توفير خدمات النظام الإيكولوجي في البيئة الاجتماعية والبيئية المتغيرة بسرعة لجبال أمريكا الجنوبية. الهدف من هذه الورقة هو تحديد خريطة طريق واسعة لتنفيذ الغطاء النباتي الجبلي في نماذج نباتية عالمية ديناميكية (DGVM) لاستخدامها في نماذج نظام الأرض (ESM)، بناءً على فهمنا الحالي من هيكلها ووظيفتها واستجابتها لمحركات التغير العالمي. كما نحدد عمليات خطوط الأشجار، الحرجة في النظم الإيكولوجية الجبلية، كعناصر رئيسية مفقودة في DGVMs/ESMs، وبالتالي نستكشف بالإضافة إلى ذلك نموذج خط الأشجار. الأساليب: تم إجراء جرد لتوافر البيانات التجريبية من ثمانية مواقع بحثية على طول جبال الأنديز وفي جنوب شرق البرازيل. من بين ثمانية مواقع، كان لدى موقعين (واحد في كل من فنزويلا والبرازيل) بعض البيانات المناخية والبيئية والفسيولوجية البيئية المحتملة مناسبة لتحديد معالم DGVM. كانت بيانات الكتلة الحيوية الثلاثية متاحة لستة مواقع. تم إجراء تقييم أولي لمحاكي بيئة الأراضي المشترك في المملكة المتحدة (JULES) DGVM لتحديد الثغرات في البيانات المتاحة وتأثيراتها على تحديد معالم النموذج ومعايرته. بالإضافة إلى ذلك، تم نمذجة الارتفاع المحتمل المحدد بالمناخ لخط الأشجار للتحقق من DGVM لقدرته على تحديد الانتقال بين الغابة الجبلية والغطاء النباتي في جبال الألب. النتائج: حددت نتائج تقييم نموذج سطح الأرض JULES العمليات الرئيسية التالية في الغابات الجبلية: الانخفاض المرتبط بدرجة الحرارة في صافي الإنتاج الأولي، والتنفس، والتخصيص للكتلة الحيوية فوق الأرض و زيادة مخزونات التربة C مع الارتفاع. كان هناك اتفاق متغير بين الكتلة الحيوية المحاكية وتلك المستمدة من القياسات الميدانية عبر المعادلات المتجانسة. الاستنتاجات: حددنا الفجوات الرئيسية بين توافر البيانات والاحتياجات إلى النمذجة القائمة على العمليات للغطاء النباتي الجبلي في أمريكا الجنوبية وديناميكياته في DGVM. لسد هذه الفجوة، نقترح شبكة متعددة التخصصات، تتألف من أعضاء المجتمعات العلمية النظرية/النمذجة والتجريبية، لدراسة الديناميكيات الطبيعية للنظم الإيكولوجية الجبلية واستجاباتها لمحركات التغيير العالمي محليًا وإقليميًا وعلى المستوى القاري، ضمن إطار النظام الاجتماعي الإيكولوجي. يشكل العمل المقدم هنا الأساس لتصميم جمع البيانات من القياسات الميدانية ومحطات المراقبة الآلية إلى بارامتير والتحقق من DGVM. تم تصميم الشبكة للتعاون مع البحوث القائمة طويلة الأجل واستكمالها
Natural Environment ... arrow_drop_down Natural Environment Research Council: NERC Open Research ArchiveArticle . 2023License: CC BYData sources: Bielefeld Academic Search Engine (BASE)add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess RoutesGreen hybrid 6 citations 6 popularity Top 10% influence Average impulse Top 10% Powered by BIP!
more_vert Natural Environment ... arrow_drop_down Natural Environment Research Council: NERC Open Research ArchiveArticle . 2023License: CC BYData sources: Bielefeld Academic Search Engine (BASE)add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal 2020 United StatesPublisher:Elsevier BV Snow, D. D.; Chakraborty, P.; Uralbekov, B.; Satybaldiev, B.; Sallach, J. B.; Thornton Hampton, L. M.; Jeffries, M.; Kolok, A. S.; Bartelt-Hunt, S. B.;pmid: 32784075
The Syr Darya is one of two major rivers in Central Asia supplying critical fresh water to the Aral Sea. In spite of the river's importance and agriculturally-intensive history, few studies have provided a modern evaluation of and the occurrence of pesticide residues potential effects to aquatic life. The primary goal of this investigation was to determine seasonal variations in ambient concentrations of modern and legacy pesticides in bottom sediment and water of the Syr Darya in Kazakhstan (KZ) downstream from an agriculturally-intensive watershed in Uzbekistan. Grab samples and passive samplers were used at five remote sampling stations during June 2015 to provide a baseline for ecotoxicological evaluation. Results were compared with samples collected during and after the agricultural growing season. Polar organic chemical integrative samplers (POCIS) were used in June and calibrated for time-weighted average concentrations of current use pesticides. Among legacy chlorinated pesticides measured in grab samples from the river, lindane (γ-HCH) was detected most frequently with the highest concentrations occurring during June. For all the sampling events, residues of lindane (γ-HCH) ranged from 0.014 to 0.24 μg/L detected in water samples, are among the highest concentrations reported for rivers globally. Concentrations of γ-HCH, p,p'-DDE and dieldrin were highest in October when dieldrin concentrations approached 0.4 μg/L. Sources of legacy pesticides may be either illicit upstream use or evidence of previous atmospheric contamination of glacial meltwater. Chronic exposure to these residues may lead to ecological risk to lower order organisms in both the sediment and water column.
add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.watres.2020.116141&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen bronze 31 citations 31 popularity Top 10% influence Top 10% impulse Top 10% Powered by BIP!
visibility 3visibility views 3 download downloads 94 Powered bymore_vert add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.watres.2020.116141&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal 2007Publisher:Wiley Authors: R. L. Peterson; K. J. Stevens;pmid: 17538864
Abstract: Three pathways for resource acquisition exist in the emergent aquatic plant, Lythrum salicaria (L.); a subterranean root system, a free‐floating adventitious root system, and arbuscular mycorrhiza (AM) fungal hyphae colonizing subterranean roots. This study examined the relationship(s) among these pathways and their contribution to plant performance. If the free‐floating adventitious root system and/or AM fungi contribute to plant growth in wetland habitats, we predicted that their absence would result in a significant reduction in plant performance. Furthermore, if a reduction in resource uptake, effected by an absence of free‐floating adventitious roots and/or AM fungi, is compensated for by increased allocation to remaining pathway(s) for resource uptake, we predicted altered patterns of resource allocation among shoots and the remaining pathway(s) for resource uptake. Contrary to our predications, plants experiencing adventitious root removal and/or grown in the absence of AM fungi generally had greater biomass and total shoot height than controls. Similarly, while levels of AM colonization and subterranean root biomass displayed a treatment effect, the observed responses did not correspond with our predictions. This was also true for shoot: subterranean root dry weight ratios. Our results indicate that there is interaction among the 3 pathways for resource acquisition in L. salicaria and an effect on plant performance. The adaptive significance of these characteristics is unclear, highlighting the potential difficulties in extrapolating from terrestrial to aquatic plant species and among aquatic plant species with potentially different life history strategies.
Plant Biology arrow_drop_down Plant BiologyArticle . 2007 . Peer-reviewedLicense: Wiley Online Library User AgreementData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1055/s-2007-965079&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routesbronze 11 citations 11 popularity Top 10% influence Average impulse Average Powered by BIP!
more_vert Plant Biology arrow_drop_down Plant BiologyArticle . 2007 . Peer-reviewedLicense: Wiley Online Library User AgreementData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1055/s-2007-965079&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal 2009 United StatesPublisher:American Geophysical Union (AGU) Sonia M. Kreidenweis; Wei Min Hao; William C. Malm; Judith C. Chow; Amanda S. Holden; Hans Moosmüller; Cyle Wold; Stephen Baker; Christian M. Carrico; Amy P. Sullivan; Jeffrey L. Collett; Thomas W. Kirchstetter; Gavin R. McMeeking; Gavin R. McMeeking;doi: 10.1029/2009jd011836
We characterized the gas‐ and speciated aerosol‐phase emissions from the open combustion of 33 different plant species during a series of 255 controlled laboratory burns during the Fire Laboratory at Missoula Experiments (FLAME). The plant species we tested were chosen to improve the existing database for U.S. domestic fuels: laboratory‐based emission factors have not previously been reported for many commonly burned species that are frequently consumed by fires near populated regions and protected scenic areas. The plants we tested included the chaparral species chamise, manzanita, and ceanothus, and species common to the southeastern United States (common reed, hickory, kudzu, needlegrass rush, rhododendron, cord grass, sawgrass, titi, and wax myrtle). Fire‐integrated emission factors for gas‐phase CO2, CO, CH4, C2–4hydrocarbons, NH3, SO2, NO, NO2, HNO3, and particle‐phase organic carbon (OC), elemental carbon (EC), SO42−, NO3−, Cl−, Na+, K+, and NH4+generally varied with both fuel type and with the fire‐integrated modified combustion efficiency (MCE), a measure of the relative importance of flaming‐ and smoldering‐phase combustion to the total emissions during the burn. Chaparral fuels tended to emit less particulate OC per unit mass of dry fuel than did other fuel types, whereas southeastern species had some of the largest observed emission factors for total fine particulate matter. Our measurements spanned a larger range of MCE than prior studies, and thus help to improve estimates of the variation of emissions with combustion conditions for individual fuels.
Journal of Geophysic... arrow_drop_down Journal of Geophysical Research AtmospheresArticle . 2009 . Peer-reviewedLicense: Wiley Online Library User AgreementData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1029/2009jd011836&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routesbronze 338 citations 338 popularity Top 1% influence Top 1% impulse Top 1% Powered by BIP!
more_vert Journal of Geophysic... arrow_drop_down Journal of Geophysical Research AtmospheresArticle . 2009 . Peer-reviewedLicense: Wiley Online Library User AgreementData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1029/2009jd011836&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Report , Other literature type , Book 1978 United Kingdom, United Kingdom, United Kingdom, United StatesPublisher:Office of Scientific and Technical Information (OSTI) Authors: White, William A.; McGraw, Maryann; Gustavson, Thomas C.;doi: 10.2172/6031331
handle: 1969.3/19551
Preliminary environmental data, including current land use, substrate lithology, soils, natural hazards, water resources, biological assemblages, meteorological data, and regulatory considerations have been collected and analyzed for approximately 150 km/sup 2/ of land: (1) near Chocolate Bayou, Brazoria County, Texas, where a geopressured-geothermal test well was drilled in 1978, and (2) near the rural community of Armstrong, Kenedy County, Texas, where future geopressured-geothermal test well development may occur. The study was designed to establish an environmental data base and to determine, within spatial constraints set by subsurface reservoir conditions, environmentally suitable sites for geopressured-geothermal wells.
add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.2172/6031331&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu1 citations 1 popularity Average influence Average impulse Average Powered by BIP!
more_vert add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.2172/6031331&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article 2022 Australia, United StatesPublisher:Wiley Susan L. Prescott; Alan C. Logan; Jamie Bristow; Ricardo Rozzi; Rob Moodie; Nicole Redvers; Tari Haahtela; Sara Warber; Blake Poland; Trevor Hancock; Brian Berman;AbstractPlanetary health provides a perspective of ecological interdependence that connects the health and vitality of individuals, communities, and Earth's natural systems. It includes the social, political, and economic ecosystems that influence both individuals and whole societies. In an era of interconnected grand challenges threatening health of all systems at all scales, planetary health provides a framework for cross‐sectoral collaboration and unified systems approaches to solutions. The field of allergy is at the forefront of these efforts. Allergic conditions are a sentinel measure of environmental impact on human health in early life—illuminating how ecological changes affect immune development and predispose to a wider range of inflammatory noncommunicable diseases (NCDs). This shows how adverse macroscale ecology in the Anthropocene penetrates to the molecular level of personal and microscale ecology, including the microbial systems at the foundations of all ecosystems. It provides the basis for more integrated efforts to address widespread environmental degradation and adverse effects of maladaptive urbanization, food systems, lifestyle behaviors, and socioeconomic disadvantage. Nature‐based solutions and efforts to improve nature‐relatedness are crucial for restoring symbiosis, balance, and mutualism in every sense, recognizing that both personal lifestyle choices and collective structural actions are needed in tandem. Ultimately, meaningful ecological approaches will depend on placing greater emphasis on psychological and cultural dimensions such as mindfulness, values, and moral wisdom to ensure a sustainable and resilient future.
The University of Me... arrow_drop_down The University of Melbourne: Digital RepositoryArticle . 2022License: CC BY NCFull-Text: http://hdl.handle.net/11343/318304Data sources: Bielefeld Academic Search Engine (BASE)University of North Texas: UNT Digital LibraryArticle . 2022Data sources: Bielefeld Academic Search Engine (BASE)add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1111/all.15419&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routeshybrid 34 citations 34 popularity Top 10% influence Top 10% impulse Top 1% Powered by BIP!
more_vert The University of Me... arrow_drop_down The University of Melbourne: Digital RepositoryArticle . 2022License: CC BY NCFull-Text: http://hdl.handle.net/11343/318304Data sources: Bielefeld Academic Search Engine (BASE)University of North Texas: UNT Digital LibraryArticle . 2022Data sources: Bielefeld Academic Search Engine (BASE)add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1111/all.15419&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article 2023 United StatesPublisher:American Geophysical Union (AGU) Ricardo Rozzi; Ricardo Álvarez; Victoria Castro; David Núñez; Jaime Ojeda; Alejandra Tauro; Francisca Massardo;AbstractSince the mid‐20th century, the so‐called Great Acceleration (sensu Steffen et al., 2007, https://doi.org/10.1579/0044-7447(2007)36[614:TAAHNO]2.0.CO;2) has amplified processes of ecosystem degradation, extinction of biological species, displacement of local peoples, losses of languages, and cultural diversity. These losses are still underperceived by the academic community, and by a global society that is disconnected from biocultural diversity. To reconnect society with biocultural diversity, we integrate temporal and spatial dimensions of seasonal cycles, by combining two conceptual frameworks: ecological calendars and the “3Hs” model of the biocultural ethic (sensu Rozzi, 2012, https://doi.org/10.5840/enviroethics20123414). The latter values the vital links between human and other‐than‐human co‐inhabitants, their life habits (e.g., cultural practices of humans or life cycles of other‐than‐human species), and the structure and processes of their shared habitats. This integration enhances an understanding of links between cultural practices and the life cycles of biocultural keystone species. As a synthesis, we use the term biocultural calendars to emphasize their co‐constitutive nature that result from interactions between dynamic biophysical and cultural processes embedded in specific ecosystems and cultures. These calendars link astronomical, biological, and cultural seasonal cycles that sustain life and enhance the integration of Indigenous and scientific knowledge to confront challenges of climate change faced from local to global scales. To illustrate this integration, we examine cultural practices and socio‐environmental changes across four contrasting ethnolinguistic communities in southwestern South America, from southern to northern Chile along a marked climatic gradient to show the broad application of the concept of biocultural calendars.
GeoHealth arrow_drop_down University of North Texas: UNT Digital LibraryArticle . 2023Data sources: Bielefeld Academic Search Engine (BASE)add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess Routesgold 2 citations 2 popularity Top 10% influence Average impulse Average Powered by BIP!
more_vert GeoHealth arrow_drop_down University of North Texas: UNT Digital LibraryArticle . 2023Data sources: Bielefeld Academic Search Engine (BASE)add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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description Publicationkeyboard_double_arrow_right Article 2022 Switzerland, United States, ChilePublisher:Springer Science and Business Media LLC Funded by:SNSF | VTS: Verbal tenses and su..., SNSF | Elucidating the Eco-Evolu...SNSF| VTS: Verbal tenses and subjectivity: an empirical cognitive approach ,SNSF| Elucidating the Eco-Evolutionary Mechanisms Shaping the Genomic Landscape of IntrogressionAuthors: Claudio S. Quilodrán; Erik M. Sandvig; Francisco Aguirre; Juan Rivero de Aguilar; +3 AuthorsClaudio S. Quilodrán; Erik M. Sandvig; Francisco Aguirre; Juan Rivero de Aguilar; Omar Barroso; Rodrigo A. Vásquez; Ricardo Rozzi;AbstractA natural laboratory is a place supporting the conditions for hypothesis testing under non-anthropogenic settings. Located at the southern end of the Magellanic sub-Antarctic ecoregion in southwestern South America, the Cape Horn Biosphere Reserve (CHBR) has one of the most extreme rainfall gradients in the world. Subject to oceanic climate conditions, it is also characterized by moderate thermal fluctuations throughout the year. This makes it a unique natural laboratory for studying the effects of extreme rainfall variations on forest bird communities. Here, we monitor the bird species richness in the different forest types present in the CHBR. We found that species richness decreased with increasing precipitation, in which an increase of 100 mm in average annual precipitation showed about 1% decrease in species richness. Similar patterns were found among different forest types within the CHBR. These results provide a baseline to investigate the interactions between physical and biotic factors in a subpolar region that climatically contrasts with boreal forests, which is subject to continental climatic conditions. This research highlights the importance of ecological and ornithological long-term studies in the CHBR, which can contribute both to a higher resolution of the heterogeneity of climate changes in different regions of the world, and to orient conservation policies in the Magellanic sub-Antarctic ecoregion in the face of growing development pressures.
Universidad de Chile... arrow_drop_down Universidad de Chile: Repositorio académicoArticle . 2022License: CC BY NC NDData sources: Bielefeld Academic Search Engine (BASE)University of North Texas: UNT Digital LibraryArticle . 2022Data sources: Bielefeld Academic Search Engine (BASE)add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess Routeshybrid 2 citations 2 popularity Top 10% influence Average impulse Average Powered by BIP!
more_vert Universidad de Chile... arrow_drop_down Universidad de Chile: Repositorio académicoArticle . 2022License: CC BY NC NDData sources: Bielefeld Academic Search Engine (BASE)University of North Texas: UNT Digital LibraryArticle . 2022Data sources: Bielefeld Academic Search Engine (BASE)add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Other literature type , Journal 2010 United StatesPublisher:Public Library of Science (PLoS) Funded by:NSF | `MO: Exploring the Symbio..., NSF | Genome Sequencing of Mutu..., NSF | CAREER: Exploring Mutuali...NSF| `MO: Exploring the Symbiotic Association Between Tropical Social Insects and Actinomycetes ,NSF| Genome Sequencing of Mutualistic Bacteria Associated With Fungus-growing Ants ,NSF| CAREER: Exploring Mutualism Stability in a Community ContextAuthors: Timothy T. Harkins; Timothy J. Donohue; Timothy J. Donohue; Susannah G. Tringe; +24 AuthorsTimothy T. Harkins; Timothy J. Donohue; Timothy J. Donohue; Susannah G. Tringe; Clifton E. Foster; Clifton E. Foster; Jarrod J. Scott; Jarrod J. Scott; Jarrod J. Scott; Cameron R. Currie; Cameron R. Currie; Cameron R. Currie; Frank O. Aylward; Frank O. Aylward; Steven C. Slater; Lewyn Li; Adrián A. Pinto-Tomás; Paul J. Weimer; Lynne Goodwin; Lynne Goodwin; Markus Pauly; Markus Pauly; Pascal Bouffard; Sandra M. Adams; Sandra M. Adams; Kerrie Barry; Garret Suen; Jolene Osterberger;Les herbivores peuvent avoir un accès indirect au carbone récalcitrant présent dans les parois des cellules végétales grâce à des associations symbiotiques avec des microbes lignocellulolytiques. Un exemple paradigmatique est la fourmi coupeuse de feuilles (Tribu : Attini), qui utilise des feuilles fraîches pour cultiver un champignon pour se nourrir dans des jardins spécialisés. En utilisant une combinaison d'analyses de la composition du sucre, de la métagénomique et du séquençage du génome entier, nous révélons que le microbiome du champignon de jardin des fourmis coupeuses de feuilles est composé d'une communauté diversifiée de bactéries ayant une capacité élevée de dégradation de la biomasse végétale. La comparaison du profil enzymatique prédit de dégradation des glucides de ce microbiome avec d'autres métagénomes montre une similitude plus étroite avec le rumen bovin, indiquant une convergence évolutive du potentiel de dégradation de la biomasse végétale entre deux animaux herbivores importants. La caractérisation génomique et physiologique de deux bactéries dominantes dans le microbiome fongique du jardin fournit des preuves de leur capacité à dégrader la cellulose. Compte tenu de l'intérêt récent pour les biocarburants cellulosiques, comprendre comment la dégradation rapide et à grande échelle de la biomasse végétale se produit chez un insecte herbivore très évolué est particulièrement important pour la bioénergie. Los herbívoros pueden obtener acceso indirecto al carbono recalcitrante presente en las paredes celulares de las plantas a través de asociaciones simbióticas con microbios lignocelulolíticos. Un ejemplo paradigmático es la hormiga cortadora de hojas (Tribu: Attini), que utiliza hojas frescas para cultivar un hongo como alimento en jardines especializados. Usando una combinación de análisis de composición de azúcar, metagenómica y secuenciación del genoma completo, revelamos que el microbioma del jardín de hongos de las hormigas cortadoras de hojas está compuesto por una comunidad diversa de bacterias con alta capacidad de degradación de la biomasa vegetal. La comparación del perfil enzimático de degradación de carbohidratos predicho de este microbioma con otros metagenomas muestra la mayor similitud con el rumen bovino, lo que indica una convergencia evolutiva del potencial de degradación de la biomasa vegetal entre dos animales herbívoros importantes. La caracterización genómica y fisiológica de dos bacterias dominantes en el microbioma del jardín de hongos proporciona evidencia de su capacidad para degradar la celulosa. Dado el reciente interés en los biocombustibles celulósicos, la comprensión de cómo se produce la degradación rápida y a gran escala de la biomasa vegetal en un insecto herbívoro altamente evolucionado es de particular relevancia para la bioenergía. Herbivores can gain indirect access to recalcitrant carbon present in plant cell walls through symbiotic associations with lignocellulolytic microbes. A paradigmatic example is the leaf-cutter ant (Tribe: Attini), which uses fresh leaves to cultivate a fungus for food in specialized gardens. Using a combination of sugar composition analyses, metagenomics, and whole-genome sequencing, we reveal that the fungus garden microbiome of leaf-cutter ants is composed of a diverse community of bacteria with high plant biomass-degrading capacity. Comparison of this microbiome's predicted carbohydrate-degrading enzyme profile with other metagenomes shows closest similarity to the bovine rumen, indicating evolutionary convergence of plant biomass degrading potential between two important herbivorous animals. Genomic and physiological characterization of two dominant bacteria in the fungus garden microbiome provides evidence of their capacity to degrade cellulose. Given the recent interest in cellulosic biofuels, understanding how large-scale and rapid plant biomass degradation occurs in a highly evolved insect herbivore is of particular relevance for bioenergy. يمكن للحيوانات العاشبة الوصول بشكل غير مباشر إلى الكربون المتمرد الموجود في جدران الخلايا النباتية من خلال الارتباطات التكافلية مع الميكروبات المحللة للخلايا. ومن الأمثلة النموذجية على ذلك نملة قطع الأوراق (القبيلة: أتيني)، التي تستخدم أوراقًا طازجة لزراعة فطر للطعام في الحدائق المتخصصة. باستخدام مزيج من تحليلات تركيبة السكر، وعلم الوراثة، وتسلسل الجينوم الكامل، نكشف أن ميكروبيوم حديقة الفطريات من النمل القاطع للأوراق يتكون من مجموعة متنوعة من البكتيريا ذات القدرة العالية على تحلل الكتلة الحيوية للنبات. تُظهر مقارنة ملف تعريف إنزيم تحلل الكربوهيدرات المتوقع لهذا الميكروبيوم مع الميتاجينومات الأخرى أقرب تشابه مع الكرش البقري، مما يشير إلى التقارب التطوري لإمكانات تحلل الكتلة الحيوية النباتية بين اثنين من الحيوانات العاشبة المهمة. يوفر التوصيف الجيني والفسيولوجي لبكتيريا مهيمنة في ميكروبيوم حديقة الفطريات دليلاً على قدرتها على تحلل السليلوز. بالنظر إلى الاهتمام الأخير بالوقود الحيوي السليولوزي، فإن فهم كيفية حدوث تدهور الكتلة الحيوية النباتية على نطاق واسع وسريع في الحيوانات العاشبة الحشرية المتطورة للغاية له أهمية خاصة بالنسبة للطاقة الحيوية.
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For further information contact us at helpdesk@openaire.euAccess RoutesGreen gold 207 citations 207 popularity Top 1% influence Top 10% impulse Top 1% Powered by BIP!
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Report , Other literature type 1984 United StatesPublisher:Office of Scientific and Technical Information (OSTI) Authors: Oliver, R.L.; Youngberg, A.D.;doi: 10.2172/5237516
The Hanna Underground Coal Gasification (UCG) study area consists of the SW1/4 of Section 29 and the E1/2SE1/4 of Section 30 in Township 22 North, Range 81 West, Wyoming. Regionally, this is located in the coal-bearing Hanna Syncline of the Hanna Basin in southeast Wyoming. The structure of the site is characterized by beds dipping gently to the northeast. An east-west fault graben complex interrupts this basic trend in the center of the area. The target coal bed of the UCG experiments was the Hanna No. 1 coal in the Hanna Formation. Sedimentary rocks comprising the Hanna Formation consist of a sequence of nonmarine shales, sandstones, coals and conglomerates. The overburden of the Hanna No. 1 coal bed at the Hanna UCG site was divided into four broad local stratigraphic units. Analytical studies were made on overburden and coal samples taken from cores to determine their mineralogical composition. Textural and mineralogical characteristics of sandstones from local stratigraphic units A, B, and C were analyzed and compared. Petrographic analyses were done on the coal including oxides, forms of sulfur, pyrite types, maceral composition, and coal rank. Semi-quantitative spectrographic and analytic geochemical analyses were done on the overburden and coal and relativemore » element concentrations were compared. Trends within each stratigraphic unit were also presented and related to depositional environments. The spectrographic analysis was also done by lithotype. 34 references, 60 figures, 18 tables.« less
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For further information contact us at helpdesk@openaire.eu2 citations 2 popularity Average influence Average impulse Average Powered by BIP!
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Other literature type 2023 United KingdomPublisher:Informa UK Limited Funded by:UKRI | Can tropical Montane fore...UKRI| Can tropical Montane forest Acclimate to high temperature? Montane-AcclimLászló Nagy; Cleiton B. Eller; Lina M. Mercado; Francisco Cuesta; Luis Daniel Llambí; Erika Buscardo; Luiz E. O. C. Aragão; Carlos García‐Núñez; Rafael S. Oliveira; Milton Barbosa; Sergio Javier Ceballos; Marco Calderón-Loor; Geraldo Wilson Fernandes; Ezequiel Aráoz; Ariadna M. Q. Muñoz; Ricardo Rozzi; Francisco Aguirre; Esteban Álvarez-Dávila; Norma Salinas; Stephen Sitch;Contexte : La surveillance basée sur des placettes a fourni de nombreuses informations sur la diversité taxonomique et le stockage du carbone (C) dans les forêts tropicales de plaine du bassin amazonien. Cela a permis de mieux comprendre la relation entre la dynamique de la biomasse forestière des plaines et les facteurs du changement mondial, tels que le changement climatique et la concentration atmosphérique de CO 2. Beaucoup moins d'attention a été accordée aux écosystèmes montagneux d'Amérique du Sud qui comprennent les forêts montagnardes et la végétation alpine (páramo, puna, prairies des hautes Andes, zones humides et bruyère alpine).Ce complexe de végétation fournit une variété de services écosystémiques et forme un laboratoire naturel le long de divers gradients d'histoire/biogéographie physiographique, géologique et évolutive, et d'histoire de l'utilisation des terres.Images : Ici, nous passons en revue la compréhension empirique existante et les approches basées sur des modèles pour quantifier la contribution des écosystèmes de montagne à la fourniture de services écosystémiques dans le contexte socio-écologique en évolution rapide des montagnes sud-américaines.L' objectif de cet article est de définir une feuille de route générale pour la mise en œuvre de la végétation de montagne dans des modèles dynamiques de végétation mondiale (DGVM) à utiliser dans les modèles du système terrestre (ESM), sur la base de notre compréhension actuelle de leur structure et de leur fonction et de leur réactivité aux facteurs du changement global.Nous identifions également les processus de la limite des arbres, critiques dans les écosystèmes de montagne, comme des éléments manquants clés dans les DGVM/mes, et explorons ainsi en outre un modèle de limite des arbres.Méthodes : Un bilan de la disponibilité des données empiriques a été entrepris à partir de huit sites de recherche le long des Andes et dans le sud-est du Brésil.Parmi huit sites, deux (un au Venezuela et un au Brésil) avaient potentiellement des données climatiques, écologiques et écophysiologiques convenant au paramétrage d'une DGVM.Les données sur la biomasse des arbres étaient disponibles pour six sites.Une évaluation préliminaire de la DGVM du Joint UK Land Environment Simulator (JULES) a été réalisée pour identifier les lacunes dans les données disponibles et leurs impacts sur le paramétrage et l'étalonnage du modèle.En outre, l'élévation potentielle de la limite des arbres déterminée par le climat a été modélisée pour vérifier la DGVM quant à sa capacité à identifier la transition entre la forêt montagnarde et la végétation alpine.Résultats : Les résultats de l'évaluation du modèle de surface terrestre JULES ont identifié les processus clés suivants dans les forêts montagnardes : diminution liée à la température de la production primaire nette, respiration et allocation à la biomasse aérienne et augmentation des stocks de C dans le sol avec l'altitude.Il y avait un accord variable entre la biomasse simulée et celles dérivées des mesures sur le terrain via des équations allométriques.Conclusions : Nous avons identifié des écarts majeurs entre la disponibilité des données et les besoins de modélisation basée sur les processus de la végétation de montagne sud-américaine et de sa dynamique dans les DGVM.Pour combler cet écart, nous proposons un réseau transdisciplinaire, composé de membres des communautés théoriques/de modélisation et scientifiques empiriques, pour étudier la dynamique naturelle des écosystèmes de montagne et leurs réponses aux facteurs de changement mondiaux au niveau local, régional et continental, dans un cadre de système socio-écologique.Les travaux présentés ici constituent la base de la conception de la collecte de données à partir des mesures sur le terrain et des stations de surveillance instrumentales pour paramétrer et vérifier les DGVM.Le réseau est conçu pour collaborer et compléter les recherches à long terme existantes Antecedentes: El monitoreo basado en parcelas ha arrojado mucha información sobre la diversidad taxonómica y el almacenamiento de carbono (C) en los bosques tropicales de tierras bajas de la cuenca amazónica. Esto ha resultado en una mejor comprensión de la relación entre la dinámica de la biomasa forestal de las tierras bajas y los impulsores del cambio global, como el cambio climático y la concentración atmosférica de CO 2. Se ha prestado mucha menos atención a los ecosistemas de montaña de América del Sur que comprenden bosques montanos y vegetación alpina (páramo, puna, pastizales altoandinos, humedales y brezales alpinos).Este complejo de vegetación proporciona una variedad de servicios ecosistémicos y forma un laboratorio natural a lo largo de varios gradientes fisiográficos, geológicos y evolutivos de historia/biogeografía e historia del uso de la tierra. Objetivos: Aquí, revisamos la comprensión empírica existente y los enfoques basados en modelos para cuantificar la contribución de los ecosistemas de montaña a la prestación de servicios ecosistémicos en el entorno socioecológico rápidamente cambiante de las montañas sudamericanas. El objetivo de este documento es esbozar una amplia hoja de ruta para la implementación de la vegetación de montaña en modelos dinámicos de vegetación global (DGVM) para su uso en Modelos del Sistema Terrestre (ESM), basados en nuestra comprensión actual de su estructura y función y de su capacidad de respuesta a los impulsores del cambio global. También identificamos los procesos arbóreos, críticos en los ecosistemas de montaña, como elementos clave que faltan en las DGVM/ESM, y por lo tanto exploramos además un modelo arbóreo. Métodos: Se realizó un inventario de la disponibilidad de datos empíricos de ocho sitios de investigación a lo largo de los Andes y en el sureste de Brasil. De los ocho sitios, dos (uno en Venezuela y otro en Brasil) tenían algunos datos climáticos, ecológicos y ecofisiológicos potencialmente adecuado para parametrizar una DGVM. Se disponía de datos de biomasa de árboles para seis sitios. Se realizó una evaluación preliminar de la DGVM del Simulador Conjunto de Medio Ambiente Terrestre del Reino Unido (JULES) para identificar lagunas en los datos disponibles y sus impactos en la parametrización y calibración del modelo. Además, se modeló la posible elevación determinada por el clima de la línea de árboles para verificar la DGVM en cuanto a su capacidad para identificar la transición entre el bosque montano y la vegetación alpina. Resultados: Los resultados de la evaluación del modelo de superficie terrestre de JULES identificaron los siguientes procesos clave en los bosques montanos: disminución relacionada con la temperatura en la producción primaria neta, la respiración y la asignación a la biomasa sobre el suelo y aumento de las poblaciones de suelo C con elevación. Hubo un acuerdo variable entre la biomasa simulada y las derivadas de las mediciones de campo a través de ecuaciones alométricas. Conclusiones: Identificamos grandes brechas entre la disponibilidad de datos y las necesidades de modelado basado en procesos de la vegetación de montaña sudamericana y su dinámica en las DGVM. Para cerrar esta brecha, proponemos una red transdisciplinaria, compuesta por miembros de las comunidades científicas teóricas/de modelado y empíricas, para estudiar la dinámica natural de los ecosistemas de montaña y sus respuestas a los impulsores del cambio global a nivel local, regional y continental, dentro de un marco de sistema socioecológico. El trabajo presentado aquí forma la base para el diseño de la recopilación de datos a partir de mediciones de campo y estaciones de monitoreo instrumental para parametrizar y verificar las DGVM. La red está diseñada para colaborar y complementar la investigación existente a largo plazo. Background: Plot-based monitoring has yielded much information on the taxonomic diversity and carbon (C) storage in tropical lowland forests of the Amazon basin.This has resulted in an improved understanding of the relationship between lowland forest biomass dynamics and global change drivers, such as climate change and atmospheric CO 2 concentration.Much less attention has been paid to the mountain ecosystems of South America that comprise montane forests and alpine vegetation (páramo, puna, high Andean grasslands, wetlands, and alpine heath).This vegetation complex provides a variety of ecosystem services and forms a natural laboratory along various physiographic, geological and evolutionary history/biogeography, and land use history gradients.Aims: Here, we review existing empirical understanding and model-based approaches to quantify the contribution of mountain ecosystems to ecosystem service provision in the rapidly changing socioecological setting of the South American mountains.The objective of this paper is to outline a broad road map for the implementation of mountain vegetation into dynamic global vegetation models (DGVM) for use in Earth System Models (ESM), based on our current understanding of their structure and function and of their responsiveness to global change drivers.We also identify treeline processes, critical in mountain ecosystems, as key missing elements in DGVMs/ESMs, and thus explore in addition a treeline model.Methods: Stocktaking of the availability of empirical data was undertaken from eight research sites along the Andes and in south-eastern Brazil.Out of eight sites, two (one each in Venezuela and Brazil) had some climate, ecological and ecophysiological data potentially suitable to parametrise a DGVM.Tree biomass data were available for six sites.A preliminary assessment of the Joint UK Land Environment Simulator (JULES) DGVM was made to identify gaps in available data and their impacts on model parametrisation and calibration.Additionally, the potential climate-determined elevation of the treeline was modelled to check the DGVM for its ability to identify the transition between the montane forest and alpine vegetation.Results: Outcomes of the evaluation of the JULES land surface model identified the following key processes in montane forests: temperature-related decrease in net primary production, respiration, and allocation to above-ground biomass and increase in soil C stocks with elevation.There was a variable agreement between simulated biomass and those derived from field measurements via allometric equations.Conclusions: We identified major gaps between data availability and the needs for process-based modelling of South American mountain vegetation and its dynamics in DGVMs.To bridge this gap, we propose a transdisciplinary network, composed of members of the theoretical/modelling and empirical scientific communities, to study the natural dynamics of mountain ecosystems and their responses to global change drivers locally, regionally and at the continental scale, within a social-ecological system framework.The work presented here forms the basis for the design of data collection from field measurements and instrumental monitoring stations to parametrise and verify DGVMs.The network is designed to collaborate with and complement existing long-term research معلومات أساسية: أسفر الرصد القائم على قطعة الأرض عن الكثير من المعلومات حول التنوع التصنيفي وتخزين الكربون (C) في غابات الأراضي المنخفضة الاستوائية في حوض الأمازون. وقد أدى ذلك إلى فهم أفضل للعلاقة بين ديناميات الكتلة الحيوية للغابات المنخفضة ومحركات التغير العالمي، مثل تغير المناخ وتركيز ثاني أكسيد الكربون في الغلاف الجوي. وقد تم إيلاء اهتمام أقل بكثير للنظم الإيكولوجية الجبلية في أمريكا الجنوبية التي تشمل الغابات الجبلية والغطاء النباتي في جبال الألب (بارامو، بونا، الأراضي العشبية في أعالي الأنديز، الأراضي الرطبة، وصحة جبال الألب). يوفر مجمع الغطاء النباتي هذا مجموعة متنوعة من خدمات النظام الإيكولوجي ويشكل مختبرًا طبيعيًا على طول مختلف التاريخ الفيزيائي والجيولوجي والتطوري/الجغرافيا الحيوية، وتدرجات تاريخ استخدام الأراضي. الأهداف: نستعرض هنا الفهم التجريبي الحالي والنهج القائمة على النماذج لقياس مساهمة النظم الإيكولوجية الجبلية في توفير خدمات النظام الإيكولوجي في البيئة الاجتماعية والبيئية المتغيرة بسرعة لجبال أمريكا الجنوبية. الهدف من هذه الورقة هو تحديد خريطة طريق واسعة لتنفيذ الغطاء النباتي الجبلي في نماذج نباتية عالمية ديناميكية (DGVM) لاستخدامها في نماذج نظام الأرض (ESM)، بناءً على فهمنا الحالي من هيكلها ووظيفتها واستجابتها لمحركات التغير العالمي. كما نحدد عمليات خطوط الأشجار، الحرجة في النظم الإيكولوجية الجبلية، كعناصر رئيسية مفقودة في DGVMs/ESMs، وبالتالي نستكشف بالإضافة إلى ذلك نموذج خط الأشجار. الأساليب: تم إجراء جرد لتوافر البيانات التجريبية من ثمانية مواقع بحثية على طول جبال الأنديز وفي جنوب شرق البرازيل. من بين ثمانية مواقع، كان لدى موقعين (واحد في كل من فنزويلا والبرازيل) بعض البيانات المناخية والبيئية والفسيولوجية البيئية المحتملة مناسبة لتحديد معالم DGVM. كانت بيانات الكتلة الحيوية الثلاثية متاحة لستة مواقع. تم إجراء تقييم أولي لمحاكي بيئة الأراضي المشترك في المملكة المتحدة (JULES) DGVM لتحديد الثغرات في البيانات المتاحة وتأثيراتها على تحديد معالم النموذج ومعايرته. بالإضافة إلى ذلك، تم نمذجة الارتفاع المحتمل المحدد بالمناخ لخط الأشجار للتحقق من DGVM لقدرته على تحديد الانتقال بين الغابة الجبلية والغطاء النباتي في جبال الألب. النتائج: حددت نتائج تقييم نموذج سطح الأرض JULES العمليات الرئيسية التالية في الغابات الجبلية: الانخفاض المرتبط بدرجة الحرارة في صافي الإنتاج الأولي، والتنفس، والتخصيص للكتلة الحيوية فوق الأرض و زيادة مخزونات التربة C مع الارتفاع. كان هناك اتفاق متغير بين الكتلة الحيوية المحاكية وتلك المستمدة من القياسات الميدانية عبر المعادلات المتجانسة. الاستنتاجات: حددنا الفجوات الرئيسية بين توافر البيانات والاحتياجات إلى النمذجة القائمة على العمليات للغطاء النباتي الجبلي في أمريكا الجنوبية وديناميكياته في DGVM. لسد هذه الفجوة، نقترح شبكة متعددة التخصصات، تتألف من أعضاء المجتمعات العلمية النظرية/النمذجة والتجريبية، لدراسة الديناميكيات الطبيعية للنظم الإيكولوجية الجبلية واستجاباتها لمحركات التغيير العالمي محليًا وإقليميًا وعلى المستوى القاري، ضمن إطار النظام الاجتماعي الإيكولوجي. يشكل العمل المقدم هنا الأساس لتصميم جمع البيانات من القياسات الميدانية ومحطات المراقبة الآلية إلى بارامتير والتحقق من DGVM. تم تصميم الشبكة للتعاون مع البحوث القائمة طويلة الأجل واستكمالها
Natural Environment ... arrow_drop_down Natural Environment Research Council: NERC Open Research ArchiveArticle . 2023License: CC BYData sources: Bielefeld Academic Search Engine (BASE)add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess RoutesGreen hybrid 6 citations 6 popularity Top 10% influence Average impulse Top 10% Powered by BIP!
more_vert Natural Environment ... arrow_drop_down Natural Environment Research Council: NERC Open Research ArchiveArticle . 2023License: CC BYData sources: Bielefeld Academic Search Engine (BASE)add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal 2020 United StatesPublisher:Elsevier BV Snow, D. D.; Chakraborty, P.; Uralbekov, B.; Satybaldiev, B.; Sallach, J. B.; Thornton Hampton, L. M.; Jeffries, M.; Kolok, A. S.; Bartelt-Hunt, S. B.;pmid: 32784075
The Syr Darya is one of two major rivers in Central Asia supplying critical fresh water to the Aral Sea. In spite of the river's importance and agriculturally-intensive history, few studies have provided a modern evaluation of and the occurrence of pesticide residues potential effects to aquatic life. The primary goal of this investigation was to determine seasonal variations in ambient concentrations of modern and legacy pesticides in bottom sediment and water of the Syr Darya in Kazakhstan (KZ) downstream from an agriculturally-intensive watershed in Uzbekistan. Grab samples and passive samplers were used at five remote sampling stations during June 2015 to provide a baseline for ecotoxicological evaluation. Results were compared with samples collected during and after the agricultural growing season. Polar organic chemical integrative samplers (POCIS) were used in June and calibrated for time-weighted average concentrations of current use pesticides. Among legacy chlorinated pesticides measured in grab samples from the river, lindane (γ-HCH) was detected most frequently with the highest concentrations occurring during June. For all the sampling events, residues of lindane (γ-HCH) ranged from 0.014 to 0.24 μg/L detected in water samples, are among the highest concentrations reported for rivers globally. Concentrations of γ-HCH, p,p'-DDE and dieldrin were highest in October when dieldrin concentrations approached 0.4 μg/L. Sources of legacy pesticides may be either illicit upstream use or evidence of previous atmospheric contamination of glacial meltwater. Chronic exposure to these residues may lead to ecological risk to lower order organisms in both the sediment and water column.
add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.watres.2020.116141&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen bronze 31 citations 31 popularity Top 10% influence Top 10% impulse Top 10% Powered by BIP!
visibility 3visibility views 3 download downloads 94 Powered bymore_vert add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.watres.2020.116141&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal 2007Publisher:Wiley Authors: R. L. Peterson; K. J. Stevens;pmid: 17538864
Abstract: Three pathways for resource acquisition exist in the emergent aquatic plant, Lythrum salicaria (L.); a subterranean root system, a free‐floating adventitious root system, and arbuscular mycorrhiza (AM) fungal hyphae colonizing subterranean roots. This study examined the relationship(s) among these pathways and their contribution to plant performance. If the free‐floating adventitious root system and/or AM fungi contribute to plant growth in wetland habitats, we predicted that their absence would result in a significant reduction in plant performance. Furthermore, if a reduction in resource uptake, effected by an absence of free‐floating adventitious roots and/or AM fungi, is compensated for by increased allocation to remaining pathway(s) for resource uptake, we predicted altered patterns of resource allocation among shoots and the remaining pathway(s) for resource uptake. Contrary to our predications, plants experiencing adventitious root removal and/or grown in the absence of AM fungi generally had greater biomass and total shoot height than controls. Similarly, while levels of AM colonization and subterranean root biomass displayed a treatment effect, the observed responses did not correspond with our predictions. This was also true for shoot: subterranean root dry weight ratios. Our results indicate that there is interaction among the 3 pathways for resource acquisition in L. salicaria and an effect on plant performance. The adaptive significance of these characteristics is unclear, highlighting the potential difficulties in extrapolating from terrestrial to aquatic plant species and among aquatic plant species with potentially different life history strategies.
Plant Biology arrow_drop_down Plant BiologyArticle . 2007 . Peer-reviewedLicense: Wiley Online Library User AgreementData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1055/s-2007-965079&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routesbronze 11 citations 11 popularity Top 10% influence Average impulse Average Powered by BIP!
more_vert Plant Biology arrow_drop_down Plant BiologyArticle . 2007 . Peer-reviewedLicense: Wiley Online Library User AgreementData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1055/s-2007-965079&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal 2009 United StatesPublisher:American Geophysical Union (AGU) Sonia M. Kreidenweis; Wei Min Hao; William C. Malm; Judith C. Chow; Amanda S. Holden; Hans Moosmüller; Cyle Wold; Stephen Baker; Christian M. Carrico; Amy P. Sullivan; Jeffrey L. Collett; Thomas W. Kirchstetter; Gavin R. McMeeking; Gavin R. McMeeking;doi: 10.1029/2009jd011836
We characterized the gas‐ and speciated aerosol‐phase emissions from the open combustion of 33 different plant species during a series of 255 controlled laboratory burns during the Fire Laboratory at Missoula Experiments (FLAME). The plant species we tested were chosen to improve the existing database for U.S. domestic fuels: laboratory‐based emission factors have not previously been reported for many commonly burned species that are frequently consumed by fires near populated regions and protected scenic areas. The plants we tested included the chaparral species chamise, manzanita, and ceanothus, and species common to the southeastern United States (common reed, hickory, kudzu, needlegrass rush, rhododendron, cord grass, sawgrass, titi, and wax myrtle). Fire‐integrated emission factors for gas‐phase CO2, CO, CH4, C2–4hydrocarbons, NH3, SO2, NO, NO2, HNO3, and particle‐phase organic carbon (OC), elemental carbon (EC), SO42−, NO3−, Cl−, Na+, K+, and NH4+generally varied with both fuel type and with the fire‐integrated modified combustion efficiency (MCE), a measure of the relative importance of flaming‐ and smoldering‐phase combustion to the total emissions during the burn. Chaparral fuels tended to emit less particulate OC per unit mass of dry fuel than did other fuel types, whereas southeastern species had some of the largest observed emission factors for total fine particulate matter. Our measurements spanned a larger range of MCE than prior studies, and thus help to improve estimates of the variation of emissions with combustion conditions for individual fuels.
Journal of Geophysic... arrow_drop_down Journal of Geophysical Research AtmospheresArticle . 2009 . Peer-reviewedLicense: Wiley Online Library User AgreementData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1029/2009jd011836&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routesbronze 338 citations 338 popularity Top 1% influence Top 1% impulse Top 1% Powered by BIP!
more_vert Journal of Geophysic... arrow_drop_down Journal of Geophysical Research AtmospheresArticle . 2009 . Peer-reviewedLicense: Wiley Online Library User AgreementData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1029/2009jd011836&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Report , Other literature type , Book 1978 United Kingdom, United Kingdom, United Kingdom, United StatesPublisher:Office of Scientific and Technical Information (OSTI) Authors: White, William A.; McGraw, Maryann; Gustavson, Thomas C.;doi: 10.2172/6031331
handle: 1969.3/19551
Preliminary environmental data, including current land use, substrate lithology, soils, natural hazards, water resources, biological assemblages, meteorological data, and regulatory considerations have been collected and analyzed for approximately 150 km/sup 2/ of land: (1) near Chocolate Bayou, Brazoria County, Texas, where a geopressured-geothermal test well was drilled in 1978, and (2) near the rural community of Armstrong, Kenedy County, Texas, where future geopressured-geothermal test well development may occur. The study was designed to establish an environmental data base and to determine, within spatial constraints set by subsurface reservoir conditions, environmentally suitable sites for geopressured-geothermal wells.
add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.2172/6031331&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu1 citations 1 popularity Average influence Average impulse Average Powered by BIP!
more_vert add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.2172/6031331&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article 2022 Australia, United StatesPublisher:Wiley Susan L. Prescott; Alan C. Logan; Jamie Bristow; Ricardo Rozzi; Rob Moodie; Nicole Redvers; Tari Haahtela; Sara Warber; Blake Poland; Trevor Hancock; Brian Berman;AbstractPlanetary health provides a perspective of ecological interdependence that connects the health and vitality of individuals, communities, and Earth's natural systems. It includes the social, political, and economic ecosystems that influence both individuals and whole societies. In an era of interconnected grand challenges threatening health of all systems at all scales, planetary health provides a framework for cross‐sectoral collaboration and unified systems approaches to solutions. The field of allergy is at the forefront of these efforts. Allergic conditions are a sentinel measure of environmental impact on human health in early life—illuminating how ecological changes affect immune development and predispose to a wider range of inflammatory noncommunicable diseases (NCDs). This shows how adverse macroscale ecology in the Anthropocene penetrates to the molecular level of personal and microscale ecology, including the microbial systems at the foundations of all ecosystems. It provides the basis for more integrated efforts to address widespread environmental degradation and adverse effects of maladaptive urbanization, food systems, lifestyle behaviors, and socioeconomic disadvantage. Nature‐based solutions and efforts to improve nature‐relatedness are crucial for restoring symbiosis, balance, and mutualism in every sense, recognizing that both personal lifestyle choices and collective structural actions are needed in tandem. Ultimately, meaningful ecological approaches will depend on placing greater emphasis on psychological and cultural dimensions such as mindfulness, values, and moral wisdom to ensure a sustainable and resilient future.
The University of Me... arrow_drop_down The University of Melbourne: Digital RepositoryArticle . 2022License: CC BY NCFull-Text: http://hdl.handle.net/11343/318304Data sources: Bielefeld Academic Search Engine (BASE)University of North Texas: UNT Digital LibraryArticle . 2022Data sources: Bielefeld Academic Search Engine (BASE)add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1111/all.15419&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routeshybrid 34 citations 34 popularity Top 10% influence Top 10% impulse Top 1% Powered by BIP!
more_vert The University of Me... arrow_drop_down The University of Melbourne: Digital RepositoryArticle . 2022License: CC BY NCFull-Text: http://hdl.handle.net/11343/318304Data sources: Bielefeld Academic Search Engine (BASE)University of North Texas: UNT Digital LibraryArticle . 2022Data sources: Bielefeld Academic Search Engine (BASE)add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1111/all.15419&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article 2023 United StatesPublisher:American Geophysical Union (AGU) Ricardo Rozzi; Ricardo Álvarez; Victoria Castro; David Núñez; Jaime Ojeda; Alejandra Tauro; Francisca Massardo;AbstractSince the mid‐20th century, the so‐called Great Acceleration (sensu Steffen et al., 2007, https://doi.org/10.1579/0044-7447(2007)36[614:TAAHNO]2.0.CO;2) has amplified processes of ecosystem degradation, extinction of biological species, displacement of local peoples, losses of languages, and cultural diversity. These losses are still underperceived by the academic community, and by a global society that is disconnected from biocultural diversity. To reconnect society with biocultural diversity, we integrate temporal and spatial dimensions of seasonal cycles, by combining two conceptual frameworks: ecological calendars and the “3Hs” model of the biocultural ethic (sensu Rozzi, 2012, https://doi.org/10.5840/enviroethics20123414). The latter values the vital links between human and other‐than‐human co‐inhabitants, their life habits (e.g., cultural practices of humans or life cycles of other‐than‐human species), and the structure and processes of their shared habitats. This integration enhances an understanding of links between cultural practices and the life cycles of biocultural keystone species. As a synthesis, we use the term biocultural calendars to emphasize their co‐constitutive nature that result from interactions between dynamic biophysical and cultural processes embedded in specific ecosystems and cultures. These calendars link astronomical, biological, and cultural seasonal cycles that sustain life and enhance the integration of Indigenous and scientific knowledge to confront challenges of climate change faced from local to global scales. To illustrate this integration, we examine cultural practices and socio‐environmental changes across four contrasting ethnolinguistic communities in southwestern South America, from southern to northern Chile along a marked climatic gradient to show the broad application of the concept of biocultural calendars.
GeoHealth arrow_drop_down University of North Texas: UNT Digital LibraryArticle . 2023Data sources: Bielefeld Academic Search Engine (BASE)add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess Routesgold 2 citations 2 popularity Top 10% influence Average impulse Average Powered by BIP!
more_vert GeoHealth arrow_drop_down University of North Texas: UNT Digital LibraryArticle . 2023Data sources: Bielefeld Academic Search Engine (BASE)add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1029/2022gh000623&type=result"></script>'); --> </script>
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