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description Publicationkeyboard_double_arrow_right Article 2024 SpainPublisher:Wiley Funded by:FCT | CBMA, FCT | ARNET, EC | JUNIOR LEADERFCT| CBMA ,FCT| ARNET ,EC| JUNIOR LEADERAuthors: Gutiérrez‐Cánovas, Cayetano; von Schiller, Daniel; Pace, Giorgio; Gómez‐Gener, Lluís; +1 AuthorsGutiérrez‐Cánovas, Cayetano; von Schiller, Daniel; Pace, Giorgio; Gómez‐Gener, Lluís; Pascoal, Cláudia;AbstractStreams are significant contributors of greenhouse gases (GHG) to the atmosphere, and the increasing number of stressors degrading freshwaters may exacerbate this process, posing a threat to climatic stability. However, it is unclear whether the influence of multiple stressors on GHG concentrations in streams results from increases of in‐situ metabolism (i.e., local processes) or from changes in upstream and terrestrial GHG production (i.e., distal processes). Here, we hypothesize that the mechanisms controlling multiple stressor effects vary between carbon dioxide (CO2) and methane (CH4), with the latter being more influenced by changes in local stream metabolism, and the former mainly responding to distal processes. To test this hypothesis, we measured stream metabolism and the concentrations of CO2 (pCO2) and CH4 (pCH4) in 50 stream sites that encompass gradients of nutrient enrichment, oxygen depletion, thermal stress, riparian degradation and discharge. Our results indicate that these stressors had additive effects on stream metabolism and GHG concentrations, with stressor interactions explaining limited variance. Nutrient enrichment was associated with higher stream heterotrophy and pCO2, whereas pCH4 increased with oxygen depletion and water temperature. Discharge was positively linked to primary production, respiration and heterotrophy but correlated negatively with pCO2. Our models indicate that CO2‐equivalent concentrations can more than double in streams that experience high nutrient enrichment and oxygen depletion, compared to those with oligotrophic and oxic conditions. Structural equation models revealed that the effects of nutrient enrichment and discharge on pCO2 were related to distal processes rather than local metabolism. In contrast, pCH4 responses to nutrient enrichment, discharge and temperature were related to both local metabolism and distal processes. Collectively, our study illustrates potential climatic feedbacks resulting from freshwater degradation and provides insight into the processes mediating stressor impacts on the production of GHG in streams.
Global Change Biolog... arrow_drop_down Recolector de Ciencia Abierta, RECOLECTAArticle . 2024License: CC BY NCData sources: Recolector de Ciencia Abierta, RECOLECTAadd 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 1 citations 1 popularity Average influence Average impulse Average Powered by BIP!
more_vert Global Change Biolog... arrow_drop_down Recolector de Ciencia Abierta, RECOLECTAArticle . 2024License: CC BY NCData sources: Recolector de Ciencia Abierta, RECOLECTAadd 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/gcb.17301&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal , Other literature type 2016 PortugalPublisher:Elsevier BV Funded by:FCT | FreshBioFun: Biodiversity..., FCT | BIOTEST-Marine biotest-sy...FCT| FreshBioFun: Biodiversity and the functioning of detritus food-webs in freshwaters ,FCT| BIOTEST-Marine biotest-systems for real time oil toxicity detectionAuthors: Diana Barros; Patrícia Oliveira; Cláudia Pascoal; Fernanda Cássio;Fungi, particularly aquatic hyphomycetes, have been recognized as playing a dominant role in microbial decomposition of plant litter in streams. In this study, we used a microcosm experiment with different levels of fungal diversity (species number and identity) using monocultures and combinations with up to five aquatic hyphomycete species (Articulospora tetracladia, Tricladium splendens, Heliscus submersus, Tetrachaetum elegans and Flagellospora curta) to assess the effects of ethanol and phenanthrene on three functional measures: plant litter decomposition, fungal biomass accrual and reproduction. Alder leaves were conditioned by fungi for 7days and then were exposed to phenanthrene (1mgL(-1)) dissolved in ethanol (0.1% final concentration) or ethanol (at the concentration used to solubilise phenanthrene) for further 24days. Exposure to ethanol alone or in combination with phenanthrene decreased leaf decomposition and fungal reproduction, but increased fungal biomass produced. All aspects of fungal activity varied with species number. Fungal activity in polycultures was generally higher than that expected from the sum of the weighted performances of participating species in monoculture, suggesting complementarity between species. However, the activity of fungi in polycultures did not exceed the activity of the most productive species either in the absence or presence of ethanol alone or with phenanthrene.
Universidade do Minh... arrow_drop_down Universidade do Minho: RepositoriUMOther literature type . 2016Data sources: Universidade do Minho: RepositoriUMThe Science of The Total EnvironmentArticle . 2016 . Peer-reviewedLicense: Elsevier TDMData 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=10.1016/j.scitotenv.2016.04.190&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu4 citations 4 popularity Top 10% influence Average impulse Average Powered by BIP!
visibility 1visibility views 1 Powered bymore_vert Universidade do Minh... arrow_drop_down Universidade do Minho: RepositoriUMOther literature type . 2016Data sources: Universidade do Minho: RepositoriUMThe Science of The Total EnvironmentArticle . 2016 . Peer-reviewedLicense: Elsevier TDMData 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=10.1016/j.scitotenv.2016.04.190&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal , Other literature type 2016 PortugalPublisher:Elsevier BV Authors: Francisco Carvalho; Cláudia Pascoal; Fernanda Cássio; Ronaldo Sousa;Invasive alien species (IAS) can disrupt important ecological functions in aquatic ecosystems; however, many of these effects are not quantified and remain speculative. In this study, we assessed the effects of the invasive crayfish Procambarus clarkii (Girard, 1852) on leaf litter decomposition (a key ecosystem process) and associated invertebrates using laboratory and field manipulative experiments. The crayfish had significant impacts on leaf decomposition due to direct consumption of leaf litter and production of fine particulate organic matter, and indirectly due to consumption of invertebrate shredders. The invertebrate community did not appear to recognize P. clarkii as a predator, at least in the first stages after its introduction in the system; but this situation might change with time. Overall, results suggested that the omnivore invader P. clarkii has the potential to affect detritus-based food webs through consumption of basal resources (leaf litter) and/or consumers. Recognizing that this IAS is widespread in Europe, Asia and Africa, and may attain high density and biomass in aquatic ecosystems, our results are important to develop strategies for improving stream ecosystem functioning and to support management actions aiming to control the invasive omnivore P. clarkii.
Universidade do Minh... arrow_drop_down Universidade do Minho: RepositoriUMOther literature type . 2016Data sources: Universidade do Minho: RepositoriUMThe Science of The Total EnvironmentArticle . 2016 . Peer-reviewedLicense: Elsevier TDMData 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=10.1016/j.scitotenv.2015.09.125&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu18 citations 18 popularity Top 10% influence Average impulse Top 10% Powered by BIP!
visibility 2visibility views 2 download downloads 1 Powered bymore_vert Universidade do Minh... arrow_drop_down Universidade do Minho: RepositoriUMOther literature type . 2016Data sources: Universidade do Minho: RepositoriUMThe Science of The Total EnvironmentArticle . 2016 . Peer-reviewedLicense: Elsevier TDMData 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=10.1016/j.scitotenv.2015.09.125&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euResearch data keyboard_double_arrow_right Dataset 2021Publisher:CORA.Repositori de Dades de Recerca Authors: Arias del Real, Rebeca; Gutiérrez-Cánovas, Cayetano; Muñoz Gràcia, Isabel; Pascoal, Cláudia; +1 AuthorsArias del Real, Rebeca; Gutiérrez-Cánovas, Cayetano; Muñoz Gràcia, Isabel; Pascoal, Cláudia; Menéndez López, Margarita;Data set of 15 low-order streams in which we characterized drying (intermittence descriptors), environmental descriptors, fungal richness, organic matter decomposition and fungal biomass for each stream.
Recolector de Cienci... arrow_drop_down Recolector de Ciencia Abierta, RECOLECTADataset . 2021Data sources: Recolector de Ciencia Abierta, RECOLECTACORA. Repositori de Dades de RecercaDataset . 2021License: CC BYData sources: CORA. Repositori de Dades de Recercaadd 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=dedup_wf_002::96b2153b70916cb5682b7ba5263635f2&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu0 citations 0 popularity Average influence Average impulse Average Powered by BIP!
more_vert Recolector de Cienci... arrow_drop_down Recolector de Ciencia Abierta, RECOLECTADataset . 2021Data sources: Recolector de Ciencia Abierta, RECOLECTACORA. Repositori de Dades de RecercaDataset . 2021License: CC BYData sources: CORA. Repositori de Dades de Recercaadd 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=dedup_wf_002::96b2153b70916cb5682b7ba5263635f2&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal , Other literature type 2006 PortugalPublisher:Springer Science and Business Media LLC Funded by:FCT | SFRH/BD/13482/2003FCT| SFRH/BD/13482/2003Authors: Duarte, Sofia Alexandra Ferreira; Pascoal, Cláudia; Cássio, Fernanda; Barlocher, F.;We conducted a microcosm experiment with monocultures and all possible combinations of four aquatic hyphomycete species, Articulospora tetracladia, Flagellospora curta, Geniculospora grandis and Heliscus submersus, to examine the potential effects of species richness on three functional aspects: leaf litter decomposition (leaf mass loss), fungal production (ergosterol buildup) and reproductive effort (released spores). Both species richness and identity significantly affected fungal biomass and conidial production (number and biomass of released spores), whereas only species identity had a significant effect on leaf mass loss. In mixed cultures, all measures of fungal functions were greater than expected from the weighted performances of participating species in monoculture. Mixed cultures outperformed the most active monoculture for biomass accumulation but not for leaf mass loss and conidial production. The three examined aspects of aquatic hyphomycete activity tended to increase with species richness, and a complementary effect was unequivocally demonstrated for fungal biomass. Our results also suggest that specific traits of certain species may have a greater influence on ecosystem functioning than species number.
Universidade do Minh... arrow_drop_down Universidade do Minho: RepositoriUMOther literature type . 2006Data sources: Universidade do Minho: RepositoriUMadd 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=10.1007/s00442-005-0300-4&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu161 citations 161 popularity Top 1% influence Top 10% impulse Top 1% Powered by BIP!
visibility 1visibility views 1 Powered bymore_vert Universidade do Minh... arrow_drop_down Universidade do Minho: RepositoriUMOther literature type . 2006Data sources: Universidade do Minho: RepositoriUMadd 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=10.1007/s00442-005-0300-4&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal 2021 Spain, PortugalPublisher:Springer Science and Business Media LLC Funded by:FCT | STREAMECOFCT| STREAMECOAuthors: Cayetano Gutiérrez-Cánovas; Cayetano Gutiérrez-Cánovas; Rebeca Arias-Real; Isabel Muñoz; +2 AuthorsCayetano Gutiérrez-Cánovas; Cayetano Gutiérrez-Cánovas; Rebeca Arias-Real; Isabel Muñoz; Margarita Menéndez; Cláudia Pascoal;handle: 10261/249380 , 1822/90611
AbstractInvestigating the influence of biodiversity on ecosystem functioning over environmental gradients is needed to anticipate ecosystem responses to global change. However, our understanding of the functional role of freshwater biodiversity, especially for microbes, is mainly based on manipulative experiments, where biodiversity and environmental variability are minimized. Here, we combined observational and manipulative experiments to analyse how fungal biodiversity responds to and mediates the impacts of drying on two key ecosystem processes: organic matter decomposition and fungal biomass accrual. Our observational data set consists of fungal biodiversity and ecosystem processes from 15 streams spanning a natural gradient of flow intermittence. Our manipulative design evaluates the responses of ecosystem processes to two fungal richness levels crossed with three levels of drying. For the observational experiment, we found that increasing the duration of drying reduced fungal species richness and caused compositional changes. Changes in species composition were driven by species turnover, suggesting resistance mechanisms to cope with drying. We also found that fungal richness had a positive effect on organic matter decomposition and fungal biomass accrual. Positive effects of fungal biodiversity were consistent when controlling for the effects of drying duration on richness by means of structural equation modelling. In addition, our results for the manipulative experiment showed that the positive effects of higher richness on both ecosystem processes were evident even when exposed to short or long simulated drying. Overall, our study suggests that maintaining high levels of biodiversity is crucial for maintaining functional freshwater ecosystems in response to ongoing and future environmental changes.
Ecosystems arrow_drop_down Recolector de Ciencia Abierta, RECOLECTAArticle . 2021 . Peer-reviewedData sources: Recolector de Ciencia Abierta, RECOLECTADiposit Digital de la Universitat de BarcelonaArticle . 2021License: CC BYData sources: Diposit Digital de la Universitat de BarcelonaRecolector de Ciencia Abierta, RECOLECTAArticle . 2021Data sources: Recolector de Ciencia Abierta, RECOLECTAadd 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=10.1007/s10021-021-00683-z&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen hybrid 10 citations 10 popularity Top 10% influence Average impulse Top 10% Powered by BIP!
visibility 96visibility views 96 download downloads 104 Powered bymore_vert Ecosystems arrow_drop_down Recolector de Ciencia Abierta, RECOLECTAArticle . 2021 . Peer-reviewedData sources: Recolector de Ciencia Abierta, RECOLECTADiposit Digital de la Universitat de BarcelonaArticle . 2021License: CC BYData sources: Diposit Digital de la Universitat de BarcelonaRecolector de Ciencia Abierta, RECOLECTAArticle . 2021Data sources: Recolector de Ciencia Abierta, RECOLECTAadd 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=10.1007/s10021-021-00683-z&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Other literature type 2022 PortugalPublisher:Springer Science and Business Media LLC Funded by:FCT | SFRH/BD/119957/2016, FCT | CBMA, FCT | STREAMECOFCT| SFRH/BD/119957/2016 ,FCT| CBMA ,FCT| STREAMECOAuthors: Francisco Carvalho; Ronaldo Sousa; Fernanda Cássio; Cláudia Pascoal;handle: 1822/83092
Climate change is expected to alter impacts of invasive alien species (IAS). As omnivores and ectotherms, invasive crayfish species (ICS) can be particularly influenced by altered thermal regimes with possible impacts on native species and key ecosystem processes, such as leaf-litter breakdown. We performed a controlled study using a multi-trophic approach to assess the individual and combined effects between two ICS (Pacifastacus leniusculus and Procambarus clarkii) on leaf-litter breakdown under temperature increase (15 and 18 °C). We used aquaria with one or two species combinations of ICS (2-individuals per aquarium); each aquarium contained transparent cages with three individuals of a native invertebrate detritivore (Sericostoma sp.). All aquaria had a fine-mesh bag containing microbially-colonized oak leaves to assess direct and indirect impacts of crayfish on leaf-litter breakdown and fine particulate organic matter (FPOM) production. Leaf-litter breakdown driven by microbes and Sericostoma was affected by temperature. Increasing temperature enhanced leaf-litter breakdown and FPOM production by P. clarkii, but not by P. leniusculus. At 15 °C, leaf breakdown was lower in treatments with both ICS than the expected from their individual performances, which may suggest competitive interactions between crayfish species. FPOM production was significantly correlated with leaf-litter breakdown, but not in treatments with both ICS. Our results suggest that competitive interactions between ICS may occur and potentially attenuate their impacts on key ecological processes. However, predicted increases in temperature may change the performance of IAS and increase the magnitude of their combined effects. This work was supported by the strategic programme UIDB/04050/2020 funded by the Portuguese Foundation for Science and Technology (FCT). FCT supported this work through the Streameco Project PTDC/CTA-AMB/31245/2017 and the SFRH/BD/119957/2016 scholarship (F. Carvalho).
Universidade do Minh... arrow_drop_down Universidade do Minho: RepositoriUMOther literature type . 2022Data sources: Universidade do Minho: RepositoriUMadd 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=10.1007/s10530-022-02875-7&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu4 citations 4 popularity Average influence Average impulse Average Powered by BIP!
visibility 6visibility views 6 download downloads 2 Powered bymore_vert Universidade do Minh... arrow_drop_down Universidade do Minho: RepositoriUMOther literature type . 2022Data sources: Universidade do Minho: RepositoriUMadd 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=10.1007/s10530-022-02875-7&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal , Other literature type 2009 France, PortugalPublisher:American Society for Microbiology Funded by:FCT | SFRH/BD/13482/2003FCT| SFRH/BD/13482/2003Duarte, Sofia; Pascoal, Claudia; Garabétian, Frédéric; Cassio, Fernanda; Charcosset, Jean-Yves;ABSTRACTIn streams, the release of nitrogen and phosphorus is reported to affect microbial communities and the ecological processes they govern. Moreover, the type of inorganic nitrogen (NO3, NO2, or NH4) may differently impact microbial communities. We aimed to identify the environmental factors that structure aquatic microbial communities and drive leaf litter decomposition along a gradient of eutrophication. We selected five circumneutral (Portuguese) and five alkaline (French) streams differing in nutrient concentrations to monitor mass loss of alder leaves, bacterial and fungal diversity by PCR-denaturing gradient gel electrophoresis, fungal biomass and reproduction, and bacterial biomass during 11 weeks of leaf immersion. The concentrations of inorganic nutrients in the stream water ranged from 5 to 300 μg liter−1soluble reactive phosphorus, 0.30 to 5.50 mg liter−1NO3-N, 2 to 103 μg liter−1NO2-N, and <4 to 7,100 μg liter−1NH4-N. Species richness was maximum in moderately anthropized (eutrophic) streams but decreased in the most anthropized (hypertrophic) streams. Different species assemblages were found in subsets of streams with different trophic statuses. In both geographic areas, the limiting nutrient, either nitrate or phosphate, stimulated the microbial activity in streams of intermediate trophic status. In the hypertrophic streams, fungal biomass and reproduction were significantly lower, and bacterial biomass dramatically decreased at the site with the highest ammonium concentration. The limiting nutrients that defined the trophic status were the main factor structuring fungal and bacterial communities, whatever the geographic area. A very high ammonium concentration in stream water most probably has negative impacts on microbial decomposer communities.
Open Archive Toulous... arrow_drop_down Open Archive Toulouse Archive OuverteArticle . 2009 . Peer-reviewedData sources: Open Archive Toulouse Archive OuverteINRIA a CCSD electronic archive serverArticle . 2009Data sources: INRIA a CCSD electronic archive serverInstitut National Polytechnique de Toulouse (Theses)Article . 2009 . Peer-reviewedData sources: Institut National Polytechnique de Toulouse (Theses)OATAO (Open Archive Toulouse Archive Ouverte - Université de Toulouse)Article . 2009Data sources: Bielefeld Academic Search Engine (BASE)Institut national des sciences de l'Univers: HAL-INSUArticle . 2009Full-Text: https://hal.science/hal-00954957Data sources: Bielefeld Academic Search Engine (BASE)INRIA a CCSD electronic archive serverArticle . 2009Data sources: INRIA a CCSD electronic archive serverINRIA a CCSD electronic archive serverArticle . 2009 . Peer-reviewedData sources: INRIA a CCSD electronic archive serverINRIA a CCSD electronic archive serverArticle . 2009Data sources: INRIA a CCSD electronic archive serverUniversidade do Minho: RepositoriUMOther literature type . 2009Data sources: Universidade do Minho: RepositoriUMApplied and Environmental MicrobiologyArticle . 2009 . Peer-reviewedLicense: ASM Journals Non-Commercial TDMData 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=10.1128/aem.00971-09&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen bronze 63 citations 63 popularity Top 10% influence Top 10% impulse Top 10% Powered by BIP!
visibility 15visibility views 15 download downloads 18 Powered bymore_vert Open Archive Toulous... arrow_drop_down Open Archive Toulouse Archive OuverteArticle . 2009 . Peer-reviewedData sources: Open Archive Toulouse Archive OuverteINRIA a CCSD electronic archive serverArticle . 2009Data sources: INRIA a CCSD electronic archive serverInstitut National Polytechnique de Toulouse (Theses)Article . 2009 . Peer-reviewedData sources: Institut National Polytechnique de Toulouse (Theses)OATAO (Open Archive Toulouse Archive Ouverte - Université de Toulouse)Article . 2009Data sources: Bielefeld Academic Search Engine (BASE)Institut national des sciences de l'Univers: HAL-INSUArticle . 2009Full-Text: https://hal.science/hal-00954957Data sources: Bielefeld Academic Search Engine (BASE)INRIA a CCSD electronic archive serverArticle . 2009Data sources: INRIA a CCSD electronic archive serverINRIA a CCSD electronic archive serverArticle . 2009 . Peer-reviewedData sources: INRIA a CCSD electronic archive serverINRIA a CCSD electronic archive serverArticle . 2009Data sources: INRIA a CCSD electronic archive serverUniversidade do Minho: RepositoriUMOther literature type . 2009Data sources: Universidade do Minho: RepositoriUMApplied and Environmental MicrobiologyArticle . 2009 . Peer-reviewedLicense: ASM Journals Non-Commercial TDMData 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.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal , Other literature type 2016 PortugalPublisher:Oxford University Press (OUP) Funded by:FCT | SFRH/BPD/47574/2008, FCT | CENTRE OF MOLECULAR AND E...FCT| SFRH/BPD/47574/2008 ,FCT| CENTRE OF MOLECULAR AND ENVIRONMENTAL BIOLOGYAuthors: Mora-Gomez, Juanita; Elosegi, Arturo; Duarte, Sofia Alexandra Ferreira; Cássio, Fernanda; +2 AuthorsMora-Gomez, Juanita; Elosegi, Arturo; Duarte, Sofia Alexandra Ferreira; Cássio, Fernanda; Pascoal, Cláudia; Romani, Anna M.;Microorganisms are key drivers of leaf litter decomposition; however, the mechanisms underlying the dynamics of different microbial groups are poorly understood. We investigated the effects of seasonal variation and invertebrates on fungal and bacterial dynamics, and on leaf litter decomposition. We followed the decomposition of Populus nigra litter in a Mediterranean stream through an annual cycle, using fine and coarse mesh bags. Irrespective of the season, microbial decomposition followed two stages. Initially, bacterial contribution to total microbial biomass was higher compared to later stages, and it was related to disaccharide and lignin degradation; in a later stage, bacteria were less important and were associated with hemicellulose and cellulose degradation, while fungi were related to lignin decomposition. The relevance of microbial groups in decomposition differed among seasons: fungi were more important in spring, whereas in summer, water quality changes seemed to favour bacteria and slowed down lignin and hemicellulose degradation. Invertebrates influenced litter-associated microbial assemblages (especially bacteria), stimulated enzyme efficiencies and reduced fungal biomass. We conclude that bacterial and fungal assemblages play distinctive roles in microbial decomposition and differ in their sensitivity to environmental changes, ultimately affecting litter decomposition, which might be particularly relevant in highly seasonal ecosystems, such as intermittent streams.
FEMS Microbiology Ec... arrow_drop_down Universidade do Minho: RepositoriUMOther literature type . 2016Data sources: Universidade do Minho: RepositoriUMadd 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 52 citations 52 popularity Top 10% influence Top 10% impulse Top 10% Powered by BIP!
more_vert FEMS Microbiology Ec... arrow_drop_down Universidade do Minho: RepositoriUMOther literature type . 2016Data sources: Universidade do Minho: RepositoriUMadd 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 , Journal 2014Publisher:Elsevier BV Dirk Dobritzsch; Fernanda Cássio; Dietmar Schlosser; Gerd-Joachim Krauss; Katharina Gerth; Stefan Helm; Arunava Pradhan; Melanie Dobritzsch; Sahadevan Seena; Cláudia Pascoal;pmid: 23955249
Nanocopper oxide (nanoCuO) is among the most widely used metal oxide nanoparticles which increases their chance of being released into freshwaters. Fungi are the major microbial decomposers of plant litter in streams. Fungal laccases are multicopper oxidase enzymes that are involved in the degradation of lignin and various xenobiotic compounds. We investigated the effects of nanoCuO (5 levels, ≤ 200 mg L(-1)) on four fungal isolates collected from metal-polluted and non-polluted streams by analyzing biomass production, changes in mycelial morphology, laccase activity, and quantifying copper adsorbed to mycelia, and ionic and nanoparticulate copper in the growth media. The exposure to nanoCuO decreased the biomass produced by all fungi in a concentration- and time-dependent manner. Inhibition of biomass production was stronger in fungi from non-polluted (EC₅₀(10 days) ≤ 31 mg L(-1)) than from metal-polluted streams (EC₅₀(10 days) ≥ 65.2 mg L(-1)). NanoCuO exposure led to cell shrinkage and mycelial degeneration, particularly in fungi collected from non-polluted streams. Adsorption of nanoCuO to fungal mycelia increased with the concentration of nanoCuO in the medium and was higher in fungi from non-polluted streams. Extracellular laccase activity was induced by nanoCuO in two fungal isolates in a concentration-dependent manner, and was highly correlated with adsorbed Cu and/or ionic Cu released by dissolution from nanoCuO. Putative laccase gene fragments were also detected in these fungi. Lack of substantial laccase activity in the other fungal isolates was corroborated by the absence of laccase-like gene fragments.
The Science of The T... arrow_drop_down The Science of The Total EnvironmentArticle . 2014 . Peer-reviewedLicense: Elsevier TDMData sources: Crossrefadd 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.eu31 citations 31 popularity Top 10% influence Top 10% impulse Top 10% Powered by BIP!
more_vert The Science of The T... arrow_drop_down The Science of The Total EnvironmentArticle . 2014 . Peer-reviewedLicense: Elsevier TDMData sources: Crossrefadd 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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description Publicationkeyboard_double_arrow_right Article 2024 SpainPublisher:Wiley Funded by:FCT | CBMA, FCT | ARNET, EC | JUNIOR LEADERFCT| CBMA ,FCT| ARNET ,EC| JUNIOR LEADERAuthors: Gutiérrez‐Cánovas, Cayetano; von Schiller, Daniel; Pace, Giorgio; Gómez‐Gener, Lluís; +1 AuthorsGutiérrez‐Cánovas, Cayetano; von Schiller, Daniel; Pace, Giorgio; Gómez‐Gener, Lluís; Pascoal, Cláudia;AbstractStreams are significant contributors of greenhouse gases (GHG) to the atmosphere, and the increasing number of stressors degrading freshwaters may exacerbate this process, posing a threat to climatic stability. However, it is unclear whether the influence of multiple stressors on GHG concentrations in streams results from increases of in‐situ metabolism (i.e., local processes) or from changes in upstream and terrestrial GHG production (i.e., distal processes). Here, we hypothesize that the mechanisms controlling multiple stressor effects vary between carbon dioxide (CO2) and methane (CH4), with the latter being more influenced by changes in local stream metabolism, and the former mainly responding to distal processes. To test this hypothesis, we measured stream metabolism and the concentrations of CO2 (pCO2) and CH4 (pCH4) in 50 stream sites that encompass gradients of nutrient enrichment, oxygen depletion, thermal stress, riparian degradation and discharge. Our results indicate that these stressors had additive effects on stream metabolism and GHG concentrations, with stressor interactions explaining limited variance. Nutrient enrichment was associated with higher stream heterotrophy and pCO2, whereas pCH4 increased with oxygen depletion and water temperature. Discharge was positively linked to primary production, respiration and heterotrophy but correlated negatively with pCO2. Our models indicate that CO2‐equivalent concentrations can more than double in streams that experience high nutrient enrichment and oxygen depletion, compared to those with oligotrophic and oxic conditions. Structural equation models revealed that the effects of nutrient enrichment and discharge on pCO2 were related to distal processes rather than local metabolism. In contrast, pCH4 responses to nutrient enrichment, discharge and temperature were related to both local metabolism and distal processes. Collectively, our study illustrates potential climatic feedbacks resulting from freshwater degradation and provides insight into the processes mediating stressor impacts on the production of GHG in streams.
Global Change Biolog... arrow_drop_down Recolector de Ciencia Abierta, RECOLECTAArticle . 2024License: CC BY NCData sources: Recolector de Ciencia Abierta, RECOLECTAadd 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 1 citations 1 popularity Average influence Average impulse Average Powered by BIP!
more_vert Global Change Biolog... arrow_drop_down Recolector de Ciencia Abierta, RECOLECTAArticle . 2024License: CC BY NCData sources: Recolector de Ciencia Abierta, RECOLECTAadd 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/gcb.17301&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal , Other literature type 2016 PortugalPublisher:Elsevier BV Funded by:FCT | FreshBioFun: Biodiversity..., FCT | BIOTEST-Marine biotest-sy...FCT| FreshBioFun: Biodiversity and the functioning of detritus food-webs in freshwaters ,FCT| BIOTEST-Marine biotest-systems for real time oil toxicity detectionAuthors: Diana Barros; Patrícia Oliveira; Cláudia Pascoal; Fernanda Cássio;Fungi, particularly aquatic hyphomycetes, have been recognized as playing a dominant role in microbial decomposition of plant litter in streams. In this study, we used a microcosm experiment with different levels of fungal diversity (species number and identity) using monocultures and combinations with up to five aquatic hyphomycete species (Articulospora tetracladia, Tricladium splendens, Heliscus submersus, Tetrachaetum elegans and Flagellospora curta) to assess the effects of ethanol and phenanthrene on three functional measures: plant litter decomposition, fungal biomass accrual and reproduction. Alder leaves were conditioned by fungi for 7days and then were exposed to phenanthrene (1mgL(-1)) dissolved in ethanol (0.1% final concentration) or ethanol (at the concentration used to solubilise phenanthrene) for further 24days. Exposure to ethanol alone or in combination with phenanthrene decreased leaf decomposition and fungal reproduction, but increased fungal biomass produced. All aspects of fungal activity varied with species number. Fungal activity in polycultures was generally higher than that expected from the sum of the weighted performances of participating species in monoculture, suggesting complementarity between species. However, the activity of fungi in polycultures did not exceed the activity of the most productive species either in the absence or presence of ethanol alone or with phenanthrene.
Universidade do Minh... arrow_drop_down Universidade do Minho: RepositoriUMOther literature type . 2016Data sources: Universidade do Minho: RepositoriUMThe Science of The Total EnvironmentArticle . 2016 . Peer-reviewedLicense: Elsevier TDMData 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.
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For further information contact us at helpdesk@openaire.eu4 citations 4 popularity Top 10% influence Average impulse Average Powered by BIP!
visibility 1visibility views 1 Powered bymore_vert Universidade do Minh... arrow_drop_down Universidade do Minho: RepositoriUMOther literature type . 2016Data sources: Universidade do Minho: RepositoriUMThe Science of The Total EnvironmentArticle . 2016 . Peer-reviewedLicense: Elsevier TDMData 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=10.1016/j.scitotenv.2016.04.190&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal , Other literature type 2016 PortugalPublisher:Elsevier BV Authors: Francisco Carvalho; Cláudia Pascoal; Fernanda Cássio; Ronaldo Sousa;Invasive alien species (IAS) can disrupt important ecological functions in aquatic ecosystems; however, many of these effects are not quantified and remain speculative. In this study, we assessed the effects of the invasive crayfish Procambarus clarkii (Girard, 1852) on leaf litter decomposition (a key ecosystem process) and associated invertebrates using laboratory and field manipulative experiments. The crayfish had significant impacts on leaf decomposition due to direct consumption of leaf litter and production of fine particulate organic matter, and indirectly due to consumption of invertebrate shredders. The invertebrate community did not appear to recognize P. clarkii as a predator, at least in the first stages after its introduction in the system; but this situation might change with time. Overall, results suggested that the omnivore invader P. clarkii has the potential to affect detritus-based food webs through consumption of basal resources (leaf litter) and/or consumers. Recognizing that this IAS is widespread in Europe, Asia and Africa, and may attain high density and biomass in aquatic ecosystems, our results are important to develop strategies for improving stream ecosystem functioning and to support management actions aiming to control the invasive omnivore P. clarkii.
Universidade do Minh... arrow_drop_down Universidade do Minho: RepositoriUMOther literature type . 2016Data sources: Universidade do Minho: RepositoriUMThe Science of The Total EnvironmentArticle . 2016 . Peer-reviewedLicense: Elsevier TDMData 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=10.1016/j.scitotenv.2015.09.125&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu18 citations 18 popularity Top 10% influence Average impulse Top 10% Powered by BIP!
visibility 2visibility views 2 download downloads 1 Powered bymore_vert Universidade do Minh... arrow_drop_down Universidade do Minho: RepositoriUMOther literature type . 2016Data sources: Universidade do Minho: RepositoriUMThe Science of The Total EnvironmentArticle . 2016 . Peer-reviewedLicense: Elsevier TDMData 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=10.1016/j.scitotenv.2015.09.125&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euResearch data keyboard_double_arrow_right Dataset 2021Publisher:CORA.Repositori de Dades de Recerca Authors: Arias del Real, Rebeca; Gutiérrez-Cánovas, Cayetano; Muñoz Gràcia, Isabel; Pascoal, Cláudia; +1 AuthorsArias del Real, Rebeca; Gutiérrez-Cánovas, Cayetano; Muñoz Gràcia, Isabel; Pascoal, Cláudia; Menéndez López, Margarita;Data set of 15 low-order streams in which we characterized drying (intermittence descriptors), environmental descriptors, fungal richness, organic matter decomposition and fungal biomass for each stream.
Recolector de Cienci... arrow_drop_down Recolector de Ciencia Abierta, RECOLECTADataset . 2021Data sources: Recolector de Ciencia Abierta, RECOLECTACORA. Repositori de Dades de RecercaDataset . 2021License: CC BYData sources: CORA. Repositori de Dades de Recercaadd 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=dedup_wf_002::96b2153b70916cb5682b7ba5263635f2&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu0 citations 0 popularity Average influence Average impulse Average Powered by BIP!
more_vert Recolector de Cienci... arrow_drop_down Recolector de Ciencia Abierta, RECOLECTADataset . 2021Data sources: Recolector de Ciencia Abierta, RECOLECTACORA. Repositori de Dades de RecercaDataset . 2021License: CC BYData sources: CORA. Repositori de Dades de Recercaadd 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=dedup_wf_002::96b2153b70916cb5682b7ba5263635f2&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal , Other literature type 2006 PortugalPublisher:Springer Science and Business Media LLC Funded by:FCT | SFRH/BD/13482/2003FCT| SFRH/BD/13482/2003Authors: Duarte, Sofia Alexandra Ferreira; Pascoal, Cláudia; Cássio, Fernanda; Barlocher, F.;We conducted a microcosm experiment with monocultures and all possible combinations of four aquatic hyphomycete species, Articulospora tetracladia, Flagellospora curta, Geniculospora grandis and Heliscus submersus, to examine the potential effects of species richness on three functional aspects: leaf litter decomposition (leaf mass loss), fungal production (ergosterol buildup) and reproductive effort (released spores). Both species richness and identity significantly affected fungal biomass and conidial production (number and biomass of released spores), whereas only species identity had a significant effect on leaf mass loss. In mixed cultures, all measures of fungal functions were greater than expected from the weighted performances of participating species in monoculture. Mixed cultures outperformed the most active monoculture for biomass accumulation but not for leaf mass loss and conidial production. The three examined aspects of aquatic hyphomycete activity tended to increase with species richness, and a complementary effect was unequivocally demonstrated for fungal biomass. Our results also suggest that specific traits of certain species may have a greater influence on ecosystem functioning than species number.
Universidade do Minh... arrow_drop_down Universidade do Minho: RepositoriUMOther literature type . 2006Data sources: Universidade do Minho: RepositoriUMadd 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=10.1007/s00442-005-0300-4&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu161 citations 161 popularity Top 1% influence Top 10% impulse Top 1% Powered by BIP!
visibility 1visibility views 1 Powered bymore_vert Universidade do Minh... arrow_drop_down Universidade do Minho: RepositoriUMOther literature type . 2006Data sources: Universidade do Minho: RepositoriUMadd 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=10.1007/s00442-005-0300-4&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal 2021 Spain, PortugalPublisher:Springer Science and Business Media LLC Funded by:FCT | STREAMECOFCT| STREAMECOAuthors: Cayetano Gutiérrez-Cánovas; Cayetano Gutiérrez-Cánovas; Rebeca Arias-Real; Isabel Muñoz; +2 AuthorsCayetano Gutiérrez-Cánovas; Cayetano Gutiérrez-Cánovas; Rebeca Arias-Real; Isabel Muñoz; Margarita Menéndez; Cláudia Pascoal;handle: 10261/249380 , 1822/90611
AbstractInvestigating the influence of biodiversity on ecosystem functioning over environmental gradients is needed to anticipate ecosystem responses to global change. However, our understanding of the functional role of freshwater biodiversity, especially for microbes, is mainly based on manipulative experiments, where biodiversity and environmental variability are minimized. Here, we combined observational and manipulative experiments to analyse how fungal biodiversity responds to and mediates the impacts of drying on two key ecosystem processes: organic matter decomposition and fungal biomass accrual. Our observational data set consists of fungal biodiversity and ecosystem processes from 15 streams spanning a natural gradient of flow intermittence. Our manipulative design evaluates the responses of ecosystem processes to two fungal richness levels crossed with three levels of drying. For the observational experiment, we found that increasing the duration of drying reduced fungal species richness and caused compositional changes. Changes in species composition were driven by species turnover, suggesting resistance mechanisms to cope with drying. We also found that fungal richness had a positive effect on organic matter decomposition and fungal biomass accrual. Positive effects of fungal biodiversity were consistent when controlling for the effects of drying duration on richness by means of structural equation modelling. In addition, our results for the manipulative experiment showed that the positive effects of higher richness on both ecosystem processes were evident even when exposed to short or long simulated drying. Overall, our study suggests that maintaining high levels of biodiversity is crucial for maintaining functional freshwater ecosystems in response to ongoing and future environmental changes.
Ecosystems arrow_drop_down Recolector de Ciencia Abierta, RECOLECTAArticle . 2021 . Peer-reviewedData sources: Recolector de Ciencia Abierta, RECOLECTADiposit Digital de la Universitat de BarcelonaArticle . 2021License: CC BYData sources: Diposit Digital de la Universitat de BarcelonaRecolector de Ciencia Abierta, RECOLECTAArticle . 2021Data sources: Recolector de Ciencia Abierta, RECOLECTAadd 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=10.1007/s10021-021-00683-z&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen hybrid 10 citations 10 popularity Top 10% influence Average impulse Top 10% Powered by BIP!
visibility 96visibility views 96 download downloads 104 Powered bymore_vert Ecosystems arrow_drop_down Recolector de Ciencia Abierta, RECOLECTAArticle . 2021 . Peer-reviewedData sources: Recolector de Ciencia Abierta, RECOLECTADiposit Digital de la Universitat de BarcelonaArticle . 2021License: CC BYData sources: Diposit Digital de la Universitat de BarcelonaRecolector de Ciencia Abierta, RECOLECTAArticle . 2021Data sources: Recolector de Ciencia Abierta, RECOLECTAadd 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=10.1007/s10021-021-00683-z&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Other literature type 2022 PortugalPublisher:Springer Science and Business Media LLC Funded by:FCT | SFRH/BD/119957/2016, FCT | CBMA, FCT | STREAMECOFCT| SFRH/BD/119957/2016 ,FCT| CBMA ,FCT| STREAMECOAuthors: Francisco Carvalho; Ronaldo Sousa; Fernanda Cássio; Cláudia Pascoal;handle: 1822/83092
Climate change is expected to alter impacts of invasive alien species (IAS). As omnivores and ectotherms, invasive crayfish species (ICS) can be particularly influenced by altered thermal regimes with possible impacts on native species and key ecosystem processes, such as leaf-litter breakdown. We performed a controlled study using a multi-trophic approach to assess the individual and combined effects between two ICS (Pacifastacus leniusculus and Procambarus clarkii) on leaf-litter breakdown under temperature increase (15 and 18 °C). We used aquaria with one or two species combinations of ICS (2-individuals per aquarium); each aquarium contained transparent cages with three individuals of a native invertebrate detritivore (Sericostoma sp.). All aquaria had a fine-mesh bag containing microbially-colonized oak leaves to assess direct and indirect impacts of crayfish on leaf-litter breakdown and fine particulate organic matter (FPOM) production. Leaf-litter breakdown driven by microbes and Sericostoma was affected by temperature. Increasing temperature enhanced leaf-litter breakdown and FPOM production by P. clarkii, but not by P. leniusculus. At 15 °C, leaf breakdown was lower in treatments with both ICS than the expected from their individual performances, which may suggest competitive interactions between crayfish species. FPOM production was significantly correlated with leaf-litter breakdown, but not in treatments with both ICS. Our results suggest that competitive interactions between ICS may occur and potentially attenuate their impacts on key ecological processes. However, predicted increases in temperature may change the performance of IAS and increase the magnitude of their combined effects. This work was supported by the strategic programme UIDB/04050/2020 funded by the Portuguese Foundation for Science and Technology (FCT). FCT supported this work through the Streameco Project PTDC/CTA-AMB/31245/2017 and the SFRH/BD/119957/2016 scholarship (F. Carvalho).
Universidade do Minh... arrow_drop_down Universidade do Minho: RepositoriUMOther literature type . 2022Data sources: Universidade do Minho: RepositoriUMadd 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=10.1007/s10530-022-02875-7&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu4 citations 4 popularity Average influence Average impulse Average Powered by BIP!
visibility 6visibility views 6 download downloads 2 Powered bymore_vert Universidade do Minh... arrow_drop_down Universidade do Minho: RepositoriUMOther literature type . 2022Data sources: Universidade do Minho: RepositoriUMadd 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=10.1007/s10530-022-02875-7&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal , Other literature type 2009 France, PortugalPublisher:American Society for Microbiology Funded by:FCT | SFRH/BD/13482/2003FCT| SFRH/BD/13482/2003Duarte, Sofia; Pascoal, Claudia; Garabétian, Frédéric; Cassio, Fernanda; Charcosset, Jean-Yves;ABSTRACTIn streams, the release of nitrogen and phosphorus is reported to affect microbial communities and the ecological processes they govern. Moreover, the type of inorganic nitrogen (NO3, NO2, or NH4) may differently impact microbial communities. We aimed to identify the environmental factors that structure aquatic microbial communities and drive leaf litter decomposition along a gradient of eutrophication. We selected five circumneutral (Portuguese) and five alkaline (French) streams differing in nutrient concentrations to monitor mass loss of alder leaves, bacterial and fungal diversity by PCR-denaturing gradient gel electrophoresis, fungal biomass and reproduction, and bacterial biomass during 11 weeks of leaf immersion. The concentrations of inorganic nutrients in the stream water ranged from 5 to 300 μg liter−1soluble reactive phosphorus, 0.30 to 5.50 mg liter−1NO3-N, 2 to 103 μg liter−1NO2-N, and <4 to 7,100 μg liter−1NH4-N. Species richness was maximum in moderately anthropized (eutrophic) streams but decreased in the most anthropized (hypertrophic) streams. Different species assemblages were found in subsets of streams with different trophic statuses. In both geographic areas, the limiting nutrient, either nitrate or phosphate, stimulated the microbial activity in streams of intermediate trophic status. In the hypertrophic streams, fungal biomass and reproduction were significantly lower, and bacterial biomass dramatically decreased at the site with the highest ammonium concentration. The limiting nutrients that defined the trophic status were the main factor structuring fungal and bacterial communities, whatever the geographic area. A very high ammonium concentration in stream water most probably has negative impacts on microbial decomposer communities.
Open Archive Toulous... arrow_drop_down Open Archive Toulouse Archive OuverteArticle . 2009 . Peer-reviewedData sources: Open Archive Toulouse Archive OuverteINRIA a CCSD electronic archive serverArticle . 2009Data sources: INRIA a CCSD electronic archive serverInstitut National Polytechnique de Toulouse (Theses)Article . 2009 . Peer-reviewedData sources: Institut National Polytechnique de Toulouse (Theses)OATAO (Open Archive Toulouse Archive Ouverte - Université de Toulouse)Article . 2009Data sources: Bielefeld Academic Search Engine (BASE)Institut national des sciences de l'Univers: HAL-INSUArticle . 2009Full-Text: https://hal.science/hal-00954957Data sources: Bielefeld Academic Search Engine (BASE)INRIA a CCSD electronic archive serverArticle . 2009Data sources: INRIA a CCSD electronic archive serverINRIA a CCSD electronic archive serverArticle . 2009 . Peer-reviewedData sources: INRIA a CCSD electronic archive serverINRIA a CCSD electronic archive serverArticle . 2009Data sources: INRIA a CCSD electronic archive serverUniversidade do Minho: RepositoriUMOther literature type . 2009Data sources: Universidade do Minho: RepositoriUMApplied and Environmental MicrobiologyArticle . 2009 . Peer-reviewedLicense: ASM Journals Non-Commercial TDMData 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=10.1128/aem.00971-09&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen bronze 63 citations 63 popularity Top 10% influence Top 10% impulse Top 10% Powered by BIP!
visibility 15visibility views 15 download downloads 18 Powered bymore_vert Open Archive Toulous... arrow_drop_down Open Archive Toulouse Archive OuverteArticle . 2009 . Peer-reviewedData sources: Open Archive Toulouse Archive OuverteINRIA a CCSD electronic archive serverArticle . 2009Data sources: INRIA a CCSD electronic archive serverInstitut National Polytechnique de Toulouse (Theses)Article . 2009 . Peer-reviewedData sources: Institut National Polytechnique de Toulouse (Theses)OATAO (Open Archive Toulouse Archive Ouverte - Université de Toulouse)Article . 2009Data sources: Bielefeld Academic Search Engine (BASE)Institut national des sciences de l'Univers: HAL-INSUArticle . 2009Full-Text: https://hal.science/hal-00954957Data sources: Bielefeld Academic Search Engine (BASE)INRIA a CCSD electronic archive serverArticle . 2009Data sources: INRIA a CCSD electronic archive serverINRIA a CCSD electronic archive serverArticle . 2009 . Peer-reviewedData sources: INRIA a CCSD electronic archive serverINRIA a CCSD electronic archive serverArticle . 2009Data sources: INRIA a CCSD electronic archive serverUniversidade do Minho: RepositoriUMOther literature type . 2009Data sources: Universidade do Minho: RepositoriUMApplied and Environmental MicrobiologyArticle . 2009 . Peer-reviewedLicense: ASM Journals Non-Commercial TDMData 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=10.1128/aem.00971-09&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal , Other literature type 2016 PortugalPublisher:Oxford University Press (OUP) Funded by:FCT | SFRH/BPD/47574/2008, FCT | CENTRE OF MOLECULAR AND E...FCT| SFRH/BPD/47574/2008 ,FCT| CENTRE OF MOLECULAR AND ENVIRONMENTAL BIOLOGYAuthors: Mora-Gomez, Juanita; Elosegi, Arturo; Duarte, Sofia Alexandra Ferreira; Cássio, Fernanda; +2 AuthorsMora-Gomez, Juanita; Elosegi, Arturo; Duarte, Sofia Alexandra Ferreira; Cássio, Fernanda; Pascoal, Cláudia; Romani, Anna M.;Microorganisms are key drivers of leaf litter decomposition; however, the mechanisms underlying the dynamics of different microbial groups are poorly understood. We investigated the effects of seasonal variation and invertebrates on fungal and bacterial dynamics, and on leaf litter decomposition. We followed the decomposition of Populus nigra litter in a Mediterranean stream through an annual cycle, using fine and coarse mesh bags. Irrespective of the season, microbial decomposition followed two stages. Initially, bacterial contribution to total microbial biomass was higher compared to later stages, and it was related to disaccharide and lignin degradation; in a later stage, bacteria were less important and were associated with hemicellulose and cellulose degradation, while fungi were related to lignin decomposition. The relevance of microbial groups in decomposition differed among seasons: fungi were more important in spring, whereas in summer, water quality changes seemed to favour bacteria and slowed down lignin and hemicellulose degradation. Invertebrates influenced litter-associated microbial assemblages (especially bacteria), stimulated enzyme efficiencies and reduced fungal biomass. We conclude that bacterial and fungal assemblages play distinctive roles in microbial decomposition and differ in their sensitivity to environmental changes, ultimately affecting litter decomposition, which might be particularly relevant in highly seasonal ecosystems, such as intermittent streams.
FEMS Microbiology Ec... arrow_drop_down Universidade do Minho: RepositoriUMOther literature type . 2016Data sources: Universidade do Minho: RepositoriUMadd 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=10.1093/femsec/fiw121&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routesgold 52 citations 52 popularity Top 10% influence Top 10% impulse Top 10% Powered by BIP!
more_vert FEMS Microbiology Ec... arrow_drop_down Universidade do Minho: RepositoriUMOther literature type . 2016Data sources: Universidade do Minho: RepositoriUMadd 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=10.1093/femsec/fiw121&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal 2014Publisher:Elsevier BV Dirk Dobritzsch; Fernanda Cássio; Dietmar Schlosser; Gerd-Joachim Krauss; Katharina Gerth; Stefan Helm; Arunava Pradhan; Melanie Dobritzsch; Sahadevan Seena; Cláudia Pascoal;pmid: 23955249
Nanocopper oxide (nanoCuO) is among the most widely used metal oxide nanoparticles which increases their chance of being released into freshwaters. Fungi are the major microbial decomposers of plant litter in streams. Fungal laccases are multicopper oxidase enzymes that are involved in the degradation of lignin and various xenobiotic compounds. We investigated the effects of nanoCuO (5 levels, ≤ 200 mg L(-1)) on four fungal isolates collected from metal-polluted and non-polluted streams by analyzing biomass production, changes in mycelial morphology, laccase activity, and quantifying copper adsorbed to mycelia, and ionic and nanoparticulate copper in the growth media. The exposure to nanoCuO decreased the biomass produced by all fungi in a concentration- and time-dependent manner. Inhibition of biomass production was stronger in fungi from non-polluted (EC₅₀(10 days) ≤ 31 mg L(-1)) than from metal-polluted streams (EC₅₀(10 days) ≥ 65.2 mg L(-1)). NanoCuO exposure led to cell shrinkage and mycelial degeneration, particularly in fungi collected from non-polluted streams. Adsorption of nanoCuO to fungal mycelia increased with the concentration of nanoCuO in the medium and was higher in fungi from non-polluted streams. Extracellular laccase activity was induced by nanoCuO in two fungal isolates in a concentration-dependent manner, and was highly correlated with adsorbed Cu and/or ionic Cu released by dissolution from nanoCuO. Putative laccase gene fragments were also detected in these fungi. Lack of substantial laccase activity in the other fungal isolates was corroborated by the absence of laccase-like gene fragments.
The Science of The T... arrow_drop_down The Science of The Total EnvironmentArticle . 2014 . Peer-reviewedLicense: Elsevier TDMData 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=10.1016/j.scitotenv.2013.07.073&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu31 citations 31 popularity Top 10% influence Top 10% impulse Top 10% Powered by BIP!
more_vert The Science of The T... arrow_drop_down The Science of The Total EnvironmentArticle . 2014 . Peer-reviewedLicense: Elsevier TDMData 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=10.1016/j.scitotenv.2013.07.073&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu