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  • 2. Zero hunger
  • 15. Life on land
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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: de Andrade Evangelista, Ana Carolina; Garcia Ferreira, Eduarda; Ferrari da Silva, Rafael; Gomes Ilha, Júlia; +1 Authors

    Lagoa dos Patos is one of the largest coastal lagoons in the world, having socio-environmental and socioeconomic relevance for Rio Grande do Sul. The territory is historically occupied by traditional artisanal fishing communities that (re)produce their ways of life socially, materially and symbolically. In December 2021, the State Department of Environment and Infrastructure published the project to grant the use of public assets for the installation of wind farms in the lagoon. This article seeks to debate this Project, expanding the discussion on its sustainability and investigating impacts on artisanal fisheries. As a methodology, we used the Discourse Analysis, through the Public Hearing, forums and other meetings with agents concerning artisanal fishing in the state. We noticed the lack of consultation and the instrumentalization of environmental issues to legitimize the process before civil society, making the communities involved vulnerable and excluded, in addition to impacting adjacent environmental protection areas. A Lagoa dos Patos é uma das maiores lagoas costeiras mundiais, possuindo relevância socioambiental e socioeconômica para o Rio Grande do Sul. O território é ocupado, historicamente, por comunidades tradicionais de pesca artesanal que (re)produzem seus modos de vida social, material e simbolicamente. Em dezembro de 2021, a Secretaria Estadual de Meio Ambiente e Infraestrutura publicou o projeto de concessão de uso de bem público para instalação de parques eólicos na Lagoa. Este artigo busca debater esse Projeto, ampliando o diálogo sobre sua sustentabilidade e investigando os impactos na pesca artesanal. Como metodologia, utilizamos a Análise de Discurso, por meio da Audiência Pública, fóruns e outras reuniões com agentes concernentes à pesca artesanal no estado. Percebemos a ausência de consulta e a instrumentalização das questões ambientais para legitimar o processo perante a sociedade civil, vulnerabilizando e excluindo as comunidades envolvidas, além de impactar áreas de proteção ambiental adjacentes.

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    Authors: Lima, Valdeci Candido de;

    Este artículo, con área de concentración en Tecnología de las Construcciones, se propone investigar e identificar la sostenibilidad de la casa del cauchero amazónico, en las zonas caucheras de estado de Acre, en Brasil, a partir del final del siglo 19 hasta la segunda mitad del siglo 20. Se buscó traer subsidios bibliográficos e históricos, y factores constructivos determinantes, los que han atribuido significados a ese modelo de construcción, y lo han identificado como habitación sostenible. El cauchero, hombre tosco, en su mayoría migrantes, empujados por la sequía del Nordeste brasileño, en busca de riquezas, al llegar a las regiones de la Amazonia para cortar caucho y producir el látex, se introdujo en la enmarañada selva abundante en fauna y flora, un territorio rico en árboles de siringas, castañas, bambúes, palmeras y toda especie de maderas nobles. Era un mundo desconocido. Fue en ese momento, como resultado de la batalla por el control del látex, que el Acre surgió para Brasil y el mundo. Los nordestinos, sin ninguna condición financiera y con las necesidades del inicio de la ocupación, han tomado como modelo la habitación indígena amazónica, a la que han mezclado los recuerdos de las viviendas de sus lugares de origen. Así, fue utilizando técnicas rudimentales que han construido sus casas, cerca de las matas de caucho, con materiales retirados de la selva, tales como la madera y la paja de las palmeras, los bejucos y el bambú, todo sin agredir el medio ambiente. Aprendió a proteger su casa de la intemperie imprimiendo a esta habitación una interacción con la naturaleza, aprovechando los espacios abiertos, integrados y ventilados. Esos datos han sido recogidos de la historia de la creación del Acre, que trae descripciones del modelo arquitectónico de las viviendas que, al final, van a diseñar la casa del cauchero acreano como una habitación sostenible. Este artigo, com área de concentração em tecnologia das construções, propõe-se a pesquisar e identificar a sustentabilidade da casa do seringueiro amazônico, construída nos seringais acreanos, a partir do final do século 19 e segunda metade do século 20. Busca trazer subsídios bibliográficos, históricos e fatores construtivos determinantes, os quais atribuíram significados a esse modelo de construção, identificando-o como habitação sustentável. O seringueiro, homem rude, migrante em sua maioria, tangido pelas secas dos sertões nordestinos, em busca de riquezas, ao chegar às regiões da Amazônia, para cortar seringa e produzir a borracha, embrenhou-se nas densas florestas, ricas em fauna e flora. Um território abundante em seringueiras, castanheiras, bambus, palmeiras e toda espécie de madeiras nobres, um mundo desconhecido. A partir dessa ocupação passa a ser conhecido em decorrência da batalha pelo controle da borracha. Assim, o Acre surge para o Brasil e para o mundo. A população nordestina, sem condição financeira, e considerando as necessidades iniciais na época da ocupação, toma como modelo de habitação a oca indígena, misturando-a às lembranças das casas de seus locais de origem. Desse modo, com técnicas rudimentares construíram, nas colocações dos seringais, suas casas, com matéria-prima retirada da floresta, tais como a madeira, paxiúba, a palha da palmeira, o cipó, o bambu, tudo sem agredir o meio ambiente. Aprendeu a protegê-la das intempéries, imprimindo a essa habitação uma interação com a natureza, por meio de espaços abertos, integrados e ventilados. Esses dados têm como fonte a história de formação do Acre, cujas descrições apresentam o modelo arquitetônico das moradias que, ao final, vão desenhar a casa do seringueiro acreano como habitação sustentável. This article, focusing on construction technology, investigates and identifies the sustainability of the Amazon rubber tapper's home, built within the rubber tree forest of the Brazilian State of Acre from the late 19th century to the second half of the 20th century. This study also surveys bibliographical information, historical, determinant and constructive facts that attributed meanings to this model of construction, identifying it as sustainable housing. The latex collector was a crude individual, usually a migrant from the country's Northeast, driven by the droughts in the Northeastern backwoods, in search of wealth. When these people reached the Amazon regions to tap rubber trees and produce rubber, they entered the dense and lush forests, rich in rubber trees, Brazil nut trees, bamboo, palm trees and all types of hardwood. It was an unknown world. As a result of a war for latex hegemony, Acre emerged as important to Brazil and the whole world. Lacking a good financial situation and due to the basic needs and memories of their homeland, the rubber tappers built their houses similar to the Amazon native's housing, using raw materials from the forest - such as wood, paxiúba, palm straws, cipó and bamboo - without destroying the environment. They learned how to protect their homes from the storms by interacting with nature through open, integrated and windy spaces. These findings are based on the history of Acre's settlement, and the descriptions of the tappers' homes are evidence of dwellings that are fully self-sustainable.

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    Authors: Zachow, Marlowa; Coutinho, Alan Denizzar Limeira; Grisa, Jaqueline Gomes Demarchi; Barboza, Márcia Andréia; +2 Authors

    El Movimiento Sin Tierra (MST) surgió como una forma de luchar por la tierra y la reforma agraria, así como para promover el desarrollo sostenible. Las Naciones Unidas, por su parte, han estado trabajando en 17 objetivos para el desarrollo sostenible. Mediante un estudio de caso, buscamos comprender cómo la reforma agraria puede promover el desarrollo rural sostenible en el asentamiento Valmir Mota de Oliveira, en la ciudad de Cascavel, en el oeste de Paraná. Se descubrió que el Assentamiento estudiado desarrolla diversas prácticas de sostenibilidad, cumpliendo 8 de los 17 objetivos de desarrollo sostenible propuestos por la ONU. O Movimento sem terra (MST) surgiu como forma de lutar pela terra e pela reforma agrária, bem como promover o desenvolvimento sustentável. A Organização das Nações Unidas (ONU), por sua vez, tem trabalhado em 17 objetivos para o desenvolvimento sustentável. Através de um estudo de caso, buscou-se entender como a reforma agrária pode promover o desenvolvimento rural sustentável no Assentamento Valmir Mota de Oliveira, na cidade de Cascavel no Oeste do Paraná. Foi verificado que o Assentamento desenvolve várias práticas de sustentabilidade, atendendo 8 dos 17 objetivos do desenvolvimento sustentável propostos pela ONU. The Landless Movement (MST) emerged as a way to fight for land and land reform, as well as to promote sustainable development. The United Nations (UN), for its part, has been working on 17 goals for sustainable development. Through a case study, we sought to understand how land reform can promote sustainable rural development in the Valmir Mota de Oliveira Settlement, in the city of Cascavel in western Paraná. It was found that the Settlement studied develops various sustainability practices, meeting 8 of the 17 goals of sustainable development proposed by the UN.

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    Authors: Gomes, Pedro Rafael Sá Fernandes;

    A crescente frequência e gravidade dos desastres relacionados com mudanças climáticas têm causado danos económicos e perda de vidas. Em 2018 foram documentados no International Disaster Database 315 desastres relacionados com o clima, que tiveram impacto em cerca de 68 milhões de pessoas, provocando a morte de 11.804 e causando cerca de 132 mil milhões de dólares em danos e prejuízos por todo o mundo. O processo de urbanização, em concreto o crescimento das grandes cidades, é um problema atual para a sociedade, que já se sente e se fará sentir com um aumento significativo nas próximas décadas do valor da população mundial a viver em cidades em contraposição ao êxodo rural, que se traduzirá noutra tipologia de problemas como a desertificação dessas áreas. Assim, conjugando estes processos de urbanização com uma maior frequência e aumento da gravidade dos desastres relacionados com clima e ambiente torna-se necessário desenvolver e preparar os sistemas para melhorar a resiliência desses sistemas e do meio urbano em geral. Como tal, há um crescente interesse no desenvolvimento de avaliação rigorosa dos sistemas urbanos que envolvem os componentes físicos (por exemplo, edifícios e redes de transporte) e os componentes biológicos (por exemplo, plantas, animais e população humana). Essas avaliações podem revelar o nível de recuperação e o grau de adaptação e preparação, assim como, a velocidade de reação e ação das cidades a eventos disruptivos associados a um futuro assolado por um clima incerto. Assim, neste trabalho, pretende-se estudar o conceito de resiliência urbana e desenvolver um modelo de avaliação da resiliência assente em cinco dimensões: infraestrutural, ambiental, governança, económica e social, tendo por base modelos já existentes e utilizados na literatura. Para esse efeito apresenta-se uma análise mais abrangente sobre o desempenho dos municípios da Região Norte de Portugal e uma análise mais especifica para os municípios do quadrilátero urbano do Minho, com particular incidência na análise das subdimensões e dos indicadores que compõem cada dimensão da avaliação. The increasing frequency and severity of climate change-related disasters have caused economic damage and loss of life. In 2018, 315 climate-related disasters were documented in the International Disaster Database, which impacted around 68 million people, killing 11,804 and causing around US$132 billion in damages and losses worldwide. The urbanization process, specifically the growth of large cities, is a current problem for society, which is already felt and will be felt with a significant increase in the coming decades of the value of the world population living in cities as opposed to the rural exodus, which will translate into another type of problem such as the desertification of these areas. Thus, combining these urbanization processes with a greater frequency and increased severity of disasters related to climate and environment, it becomes necessary to develop and prepare systems to improve the resilience of these systems and of the urban environment in general. As such, there is growing interest in developing rigorous assessment of urban systems that involve both physical components (eg buildings and transport networks) and biological components (eg plants, animals and human population). These assessments can reveal the level of recovery and the degree of adaptation and preparation, as well as the speed of reaction and action of cities to disruptive events associated with a future plagued by an uncertain climate. Thus, in this work, we intend to study the concept of urban resilience and develop a model for assessing resilience based on five dimensions: infrastructural, environmental, governance, economic and social, based on models that already exist and are used in the literature. For this purpose, a more comprehensive analysis of the performance of the municipalities in the North of Portugal and a more specific analysis for the municipalities of the urban quadrilateral of Minho are presented, with particular focus on the analysis of the sub-dimensions and indicators that make up each dimension of the evaluation. Dissertação de mestrado de Engenharia Urbana

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    Universidade do Minho: RepositoriUM
    Other literature type . 2023
    License: CC BY
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      Universidade do Minho: RepositoriUM
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    Authors: Barbosa, Xênia de Castro; Chediak, Sheylla; Cardozo, Ivaneide Bandeira;

    La expansión de la frontera agrícola brasileña en la Amazonía ha generado profundos cambios en las formas de vida de los pueblos y comunidades tradicionales y en su relación con los recursos naturales. Los grandes proyectos de infraestructura implementados en la Amazonía, a raíz del desarrollismo, promovieron usos de la tierra desiguales e insostenibles, volviendo vulnerables a las poblaciones indígenas y sus territorios. En este artículo buscamos analizar las transformaciones en la concepción y uso de los recursos forestales por parte del pueblo indígena Paiter Suruí, en la Tierra Indígena Sete de Setembro. El estudio se basó en el método documental y los análisis se realizaron en base al Ecosocialismo (LÖWY, 2013; 2014). Los resultados apuntan a una comprensión cada vez mayor, por parte del pueblo Paiter Suruí, del valor del bosque “en pie” para la generación de ingresos, principalmente a través del uso de biomasa forestal para la captura de carbono; también indican la introducción de esta etnia en el debate internacional sobre la crisis ambiental y el calentamiento global. The Brazilian agricultural border expansion across the Amazon has triggered profound changes in the traditional people and communities’ lives and in their relationships with natural resources. Large infrastructure projects have been implemented in the Amazon under the heading of developmentalism promote unequal and unsustainable land uses, making indigenous populations and their territories vulnerable. In this paper we aim at analyzing transformations in the conception and use of forest resources by the Paiter Suruí indigenous people, in Sete de Setembro Indigenous Territory. The study was based on the documentary method and the analyses was carried out on the basis of Ecosocialism (LÖWY, 2013; 2014). The results point to a growing understanding, by the Paiter Suruí people, of the “standing” forest value for income generation, especially through the use of forest biomass for carbon sequestration; they also indicate the ethnic group introduction into the international debate on the environmental crisis and global warming. A expansão da fronteira agrícola brasileira na Amazônia gerou profundas mudanças nos modos de vida de povos e comunidades tradicionais e em suas relações com os recursos naturais. Os grandes projetos de infraestrutura implementados na Amazônia, na esteira do desenvolvimentismo, promoveram usos desiguais e insustentáveis do solo, tornando vulneráveis as populações indígenas e seus territórios. Neste artigo buscamos analisar as transformações na concepção e uso dos recursos florestais pelo povo indígena Paiter Suruí, na Terra Indígena Sete de Setembro. O estudo baseou-se no método documental e as análises foram conduzidas com base no Ecossocialismo (LÖWY, 2013; 2014). Os resultados apontam para uma compreensão crescente, por parte do povo Paiter Suruí, do valor da floresta em “pé” para geração de renda, principalmente por meio do uso da biomassa florestal para sequestro de carbono; indicam também a introdução dessa etnia no debate internacional sobre a crise ambiental e o aquecimento global.

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    Authors: MVA Barros; orcid bw Kieling, AC;
    Kieling, AC
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    -The main objective of this work was to apply the indicators of Ecological Footprint to measure the current state of the art company studied the Industrial Pole of Manaus. For this, there was a comprehensive review of existing methodologies for adaptation on a smaller scale .Then the consumption variables necessary for the calculation of the Ecological Footprint in Corporate Environment were identified .It was used at first exploratory research and approach the second moment of theoretical and descriptive research by collecting primary data within an enterprise PIM . The literature for composition of a theoretical and documentary research for access to secondary data required for calculation of the indicators were also used .Data collection was conducted through a questionnaire , with explanatory text at the beginning , which was answered by those responsible for the requested data. The quantitative method is related to the use of quantification of variables ,use of formulas for the calculation of indicators and statistical techniques to ensure accurate results . As a result of the research, it was found that the Ecological Footprint Company (-894.62 gha) is within the standards set nationally (2.9 gha) and that may encourage more consumption of fish instead of beef . It is relevant attention to the sustainability of our green areas, because of the 44 hectares of the Urban Zone of Manaus, 28 000 have been deforested. Cite as: MVA Barros, AC Kieling. "ECOLOGICAL FOOTPRINT: APPROXIMATE FOR A STUDY ON APPLICABILITY OF INDUSTRIAL INDUSTRIES POLO MANAUS FREE ZONE – PIM (BRAZIL)". In: REVIEW OF RESEARCH, Vol. 4, Issue 6/March 2015, pp. 1-11.

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    Climate change already affects everyone. Anthropogenic actions produce planetary impacts and accelerate global warming. Municipalities around the world have been suffering from heat waves, prolonged droughts, torrential rains, tornadoes, cyclones, hurricanes, among others, which are increasingly recurrent. The objective of this essay is to show that cities have a strategic role, both in facing these atmospheric changes that we are experiencing, as well as in the decision-making power for coping actions. For this, we use the concept of geographic scale as a methodology, as a conceptual tool to articulate the different conflicting and complex levels of the current climate crisis. Identifying urban singularities, through a closer approximation of people's spatial reality, using this concept, is necessary to mitigate the social consequences of the process. The results elucidated that cities have unique characteristics to generate adaptations to these current climate changes, through a closer and more effective look at the local scale.

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    Authors: Pereira, Atailson Campos; Anjos, Alex Soares dos; Oliveira, Emerson Palermo de; Siqueira, Thalyson Ade; +4 Authors

    El sorgo dulce [Sorghum bicolor (L.) Moench, pertenece a la familia Poaceae, tiene tallos suculentos con alto contenido de azúcares fermentables. La búsqueda de alternativas para el sector azucarero-alcohólico y energético brasileño, el cultivo de sorgo dulce se presenta al mercado con ventajas, apuntando su uso con fines energéticos tales como: ciclo rápido y cultivo totalmente mecanizado. Esta investigación tiene como objetivo evaluar el comportamiento agronómico de diferentes cultivares de sorgo dulce en condiciones ambientales en la región de Cáceres, con el fin de brindar a la industria azucarera y alcohólica el mejor cultivar para la producción de etanol. El experimento se realizó en la cosecha 2019/20 en el área experimental del Laboratorio de Recursos Genéticos y Biotecnología (LRG & B) de la UNEMAT, en Cáceres. Se evaluaron veinticinco genotipos de sorgo dulce, proporcionados por EMBRAPA. El experimento se instaló en un diseño de bloques al azar, con tres repeticiones. Las características evaluadas fueron: floración, altura, peso de la masa verde, peso de la masa seca, peso del caldo, volumen promedio del caldo, sólidos solubles totales y tonelada de brix por hectárea. Sometido a análisis de varianza y comparación de medias mediante la prueba de agrupación de medias de Scott-Knott. Los coeficientes de variación presentados para las características oscilaron entre 1,63 y 39,69%, en este sentido el coeficiente de variación puede verse influenciado por las condiciones edafoclimáticas del cultivo. Los cultivares que más se destacaron obteniendo mejores resultados para esta región fueron CMSXS5035, CMSXS5036 y CMSXS5037 en volumen promedio de caldo, peso de caldo, peso de masa verde, peso de masa seca y obtuvieron buenos resultados en tonelada de Brix por hectárea. The sweet sorghum [Sorghum bicolor (L.) Moench, belongs to the Poaceae family, has succulent stalks with high contents of fermentable sugars. The search for alternatives for the Brazilian sugar-alcohol and energy sector, the cultivation of sweet sorghum presents itself to the market with advantages, aiming its use for energy purposes such as: fast cycle and fully mechanized culture. This research aims to evaluate the agronomic performance of different cultivars of sweet sorghum under environmental conditions in the region of Cáceres, in order to provide the sugar and alcohol industry with the best cultivar for ethanol production. The experiment was conducted in the 2019/20 harvest in the experimental area of the Laboratory of Genetic Resources & Biotechnology (LRG&B) at UNEMAT, in Cáceres. Twenty-five sweet sorghum genotypes, provided by EMBRAPA, were evaluated. The experiment was installed in a random block design, with three replications. The characteristics evaluated were flowering, height, green mass weight, dry mass weight, broth weight, average broth volume, total soluble solids and ton of brix per hectare. Submitted to analysis of variance and comparison of means by the Scott-Knott grouping of means test. The coefficients of variation presented for the characteristics ranged from 1.63 to 39.69%, in this sense, the coefficient of variation can be influenced by the edaphoclimatic conditions of the crop. The cultivars that most stood out obtaining better results for this region were CMSXS5035, CMSXS5036 and CMSXS5037 in average broth volume, broth weight, green mass weight, dry mass weight and obtained good results in a ton of Brix per hectare. O sorgo sacarino [Sorghum bicolor (L.) Moench, pertence à família das Poaceae, apresenta colmos suculentos com altos teores de açúcares fermentescíveis. A busca de alternativas para o setor sucroalcooleiro e energético brasileiro o cultivo de sorgo sacarino apresenta-se ao mercado com vantagens, visando sua utilização para fins energéticos como: ciclo rápido e cultura totalmente mecanizável. Esta pesquisa tem objetivo avaliar a performance agronômica de diferentes cultivares de sorgo sacarino sob condições ambientais da região de Cáceres, com intuito de proporcionar à indústria sucroalcooleira a melhor cultivar para produção de etanol. O experimento foi conduzido na safra 2019/20 na área experimental do Laboratório de Recursos Genéticos & Biotecnologia (LRG&B) da UNEMAT, em Cáceres. Foram avaliados 25 genótipos de sorgo sacarino, cedidos pela EMBRAPA. O experimento foi instalado em delineamento blocos casualizado, com três repetições. As características avaliadas foram: florescimento, altura, peso de massa verde, peso de massa seca, peso de caldo, volume médio de caldo, sólidos solúveis totais e tonelada de brix por hectare. Submetidos à análise de variância e a comparação de médias pelo teste de agrupamento de médias Scott-Knott. Os coeficientes de variação apresentados para as características variaram de 1,63 a 39,69%. As cultivares que mais se destacaram obtendo melhores resultados para esta região foram CMSXS5035, CMSXS5036 e CMSXS5037 em volume médio de caldo, peso de caldo, peso de massa verde, peso de massa seca e obteve bom resultado em tonelada de Brix por hectare.

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    Authors: Neutzling, Alexandre Schneid;

    Este estudo explora os efeitos multiestressores do ambiente sobre as propriedades estruturais da biodiversidade e estabilidade do funcionamento de ecossistemas bromelícolas. Através de um experimento de colonização em habitat conservado, simulamos diferentes cenários pluviométricos em duas áreas, extremos de um gradiente de cobertura de dossel de restinga. Nosso objetivo foi verificar se diferentes condições ambientais resultam em diferentes importâncias relativas dos parâmetros de redes tróficas sobre o funcionamento global de ecossistemas. Nossos resultados evidenciam que os parâmetros de redes tróficas têm diferentes importâncias para o multifuncionamento do processamento da matéria orgânica quando os ecossistemas estão sujeitos a diferentes condições ambientais. A conectância aliada à variação de temperatura determinam o multifuncionamento em áreas de menor estresse ambiental. Em áreas de maior variação ambiental, a riqueza de espécies é o único fator que determina o multifuncionamento. Além disso, quando consideramos cenários de mudanças climáticas, como chuvas acentuadas, os ecossistemas em áreas de menor variação ambiental aparentam perder os efeitos positivos da conectância. Nossos resultados evidenciam a necessidade de considerar parâmetros gerais de redes ecológicas e a variação ambiental nos futuros estudos de biodiversidade e funcionamento ecossistêmico (B-EF). Este estudo avança na compreensão da teoria B-EF e fornece informações importantes sobre os efeitos das mudanças climáticas sobre a organização e funcionamento da biodiversidade. This study explores the multi-stressor effects of the environment on the structural properties and functioning stability of bromeliad ecosystems. Through a controlled colonization experiment in a natural habitat, we simulated different rainfall scenarios across a restinga canopy cover gradient. Our goal was to verify whether distinct environmental conditions could result in different relative importances of food web parameters when determining multiple ecosystem functions. Our results indicate that food web parameters have distinct importances in the organic matter processing chain when ecosystems are subjected to varying environmental conditions. Connectance and temperature variation determine ecosystem multifunctioning in less stressful habitats, such as closed restingas and forests. In habitats with more variation in environmental conditions (open restinga), only species richness was correlated with the multifunctionality of bromeliad ecosystems. Additionally, when we consider scenarios of climate change, ecosystems in less variable conditions (closed restinga) seem to lose the positive effects of connectance on ecosystem multifunctionality. Our results underscore the need to consider general food web parameters and environmental variation in future studies of biodiversity and ecosystem functioning (B-EF). This study advances the understanding of B-EF theory and provides important information about the effects of climate change on the organization and functioning of ecosystems. Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) Pós-graduação em Biologia Animal - IBILCE Capes: 001

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    Authors: Araújo, Humberto Sampaio; Oliveira Júnior, Manoel Xavier de; Magro, Felipe Oliveira; Cardoso, Antonio Ismael Inacio;

    O objetivo do trabalho foi estudar a influência de doses de potássio em cobertura na produção de frutos de abobrinha italiana, em duas épocas de cultivo. O delineamento experimental utilizado foi o de blocos ao acaso, com cinco doses de potássio em cobertura (0, 50, 100, 200 e 400 kg K O ha-1) e quatro repetições. Foram avaliadas as características químicas do solo ao final do cultivo, a altura, o número de folhas, a massa fresca e seca da parte vegetativa, a produção total e comercial e o número de frutos totais e comerciais. Os dados foram submetidos à análise de variância e de regressão. Para comparação entre as duas épocas de experimentação foi realizada a análise estatística conjunta. As aplicações crescentes de doses de potássio em cobertura resultaram em aumento linear no teor de potássio do solo no outono e na primavera. Não foram observadas diferenças significativas para as outras características avaliadas. A análise conjunta mostrou que na primavera as características de massa fresca e seca, número de frutos total e comercial foram superiores em relação às condições de outono, enquanto que o número de folhas por planta foi superior no outono. O acúmulo de matéria orgânica no solo foi maior no outono que na primavera. Para as condições destes experimentos, as doses de potássio utilizadas em cobertura não resultaram em ganhos de produtividade na cultura de abobrinha italiana Revista de Ciências Agrárias, vol. 36 n.º 3 (2013)

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