Hydropower affects fish trophic structure both downstream of the dam and upstream of the reservoir

Detalhes bibliográficos
Autor(a) principal: Fráguas, Patrícia Santos
Data de Publicação: 2021
Outros Autores: Pompeu, Paulo Santos
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFLA
Texto Completo: http://repositorio.ufla.br/jspui/handle/1/50169
Resumo: Dams often cause drastic changes in freshwater environments and can compromise the quality and availability of food resources in rivers. This study aims to analyze the influence of a dam on the trophic structure of fish assemblages in lotic areas located both upstream and downstream of the Irapé Hydroelectric Power Plant. Fish sampling occurred before (2003 to 2005) and after (2011 to 2017) the impoundment, which began in 2006. The trophic structure and species composition before dam construction were similar upstream of the reservoir and downstream of the dam. After the building of the dam, both aspects of the assemblages changed along the lotic stretches - the upstream incurred an increase in biomass of detritivores and a decrease of piscivores and omnivores, while downstream went exactly the opposite, causing a differentiation between the two assemblages. Because lotic areas upstream of reservoirs are also impacted by river damming, efforts for impact mitigation should also focus on these areas.
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spelling Hydropower affects fish trophic structure both downstream of the dam and upstream of the reservoirFish assemblageTrophic guildAssembleia de peixesGuilda tróficaFish - FeedingDams often cause drastic changes in freshwater environments and can compromise the quality and availability of food resources in rivers. This study aims to analyze the influence of a dam on the trophic structure of fish assemblages in lotic areas located both upstream and downstream of the Irapé Hydroelectric Power Plant. Fish sampling occurred before (2003 to 2005) and after (2011 to 2017) the impoundment, which began in 2006. The trophic structure and species composition before dam construction were similar upstream of the reservoir and downstream of the dam. After the building of the dam, both aspects of the assemblages changed along the lotic stretches - the upstream incurred an increase in biomass of detritivores and a decrease of piscivores and omnivores, while downstream went exactly the opposite, causing a differentiation between the two assemblages. Because lotic areas upstream of reservoirs are also impacted by river damming, efforts for impact mitigation should also focus on these areas.Barragens causam mudanças drásticas em ambientes de água doce e podem comprometer a qualidade e a disponibilidade de recursos alimentares nos rios. Este estudo teve como objetivo analisar a influência de uma barragem na estrutura trófica da assembleia de peixes em áreas lóticas localizadas a montante e a jusante da usina hidrelétrica de Irapé. A amostragem de peixes ocorreu antes (2003 a 2005) e após (2011 a 2017) o fechamento das comportas, iniciado em 2006. A estrutura trófica e a composição das espécies antes da construção da barragem eram semelhantes a montante do reservatório e a jusante da barragem. Após a construção da barragem, ambos os aspectos das assembleias mudaram ao longo dos trechos lóticos - a montante ocorreu um aumento na biomassa de detritívoros e diminuição de piscívoros e onívoros, enquanto a jusante ocorreu exatamente o oposto, causando uma diferenciação entre as duas assembleias. Como as áreas lóticas a montante dos reservatórios também são impactadas por barramentos, esforços para mitigação de impactos também devem se concentrar nessas áreas.Sociedade Brasileira de Ictiologia2022-06-09T21:03:40Z2022-06-09T21:03:40Z2021info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfFRÁGUAS, P. S.; POMPEU, P. S. Hydropower affects fish trophic structure both downstream of the dam and upstream of the reservoir. Neotropical Ichthyology, Porto Alegre, v. 19, n. 1, e200071, 2021. DOI: 10.1590/1982-0224-2020-0071 .http://repositorio.ufla.br/jspui/handle/1/50169Neotropical Ichthyologyreponame:Repositório Institucional da UFLAinstname:Universidade Federal de Lavras (UFLA)instacron:UFLAAttribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessFráguas, Patrícia SantosPompeu, Paulo Santoseng2022-06-09T21:03:40Zoai:localhost:1/50169Repositório InstitucionalPUBhttp://repositorio.ufla.br/oai/requestnivaldo@ufla.br || repositorio.biblioteca@ufla.bropendoar:2022-06-09T21:03:40Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA)false
dc.title.none.fl_str_mv Hydropower affects fish trophic structure both downstream of the dam and upstream of the reservoir
title Hydropower affects fish trophic structure both downstream of the dam and upstream of the reservoir
spellingShingle Hydropower affects fish trophic structure both downstream of the dam and upstream of the reservoir
Fráguas, Patrícia Santos
Fish assemblage
Trophic guild
Assembleia de peixes
Guilda trófica
Fish - Feeding
title_short Hydropower affects fish trophic structure both downstream of the dam and upstream of the reservoir
title_full Hydropower affects fish trophic structure both downstream of the dam and upstream of the reservoir
title_fullStr Hydropower affects fish trophic structure both downstream of the dam and upstream of the reservoir
title_full_unstemmed Hydropower affects fish trophic structure both downstream of the dam and upstream of the reservoir
title_sort Hydropower affects fish trophic structure both downstream of the dam and upstream of the reservoir
author Fráguas, Patrícia Santos
author_facet Fráguas, Patrícia Santos
Pompeu, Paulo Santos
author_role author
author2 Pompeu, Paulo Santos
author2_role author
dc.contributor.author.fl_str_mv Fráguas, Patrícia Santos
Pompeu, Paulo Santos
dc.subject.por.fl_str_mv Fish assemblage
Trophic guild
Assembleia de peixes
Guilda trófica
Fish - Feeding
topic Fish assemblage
Trophic guild
Assembleia de peixes
Guilda trófica
Fish - Feeding
description Dams often cause drastic changes in freshwater environments and can compromise the quality and availability of food resources in rivers. This study aims to analyze the influence of a dam on the trophic structure of fish assemblages in lotic areas located both upstream and downstream of the Irapé Hydroelectric Power Plant. Fish sampling occurred before (2003 to 2005) and after (2011 to 2017) the impoundment, which began in 2006. The trophic structure and species composition before dam construction were similar upstream of the reservoir and downstream of the dam. After the building of the dam, both aspects of the assemblages changed along the lotic stretches - the upstream incurred an increase in biomass of detritivores and a decrease of piscivores and omnivores, while downstream went exactly the opposite, causing a differentiation between the two assemblages. Because lotic areas upstream of reservoirs are also impacted by river damming, efforts for impact mitigation should also focus on these areas.
publishDate 2021
dc.date.none.fl_str_mv 2021
2022-06-09T21:03:40Z
2022-06-09T21:03:40Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv FRÁGUAS, P. S.; POMPEU, P. S. Hydropower affects fish trophic structure both downstream of the dam and upstream of the reservoir. Neotropical Ichthyology, Porto Alegre, v. 19, n. 1, e200071, 2021. DOI: 10.1590/1982-0224-2020-0071 .
http://repositorio.ufla.br/jspui/handle/1/50169
identifier_str_mv FRÁGUAS, P. S.; POMPEU, P. S. Hydropower affects fish trophic structure both downstream of the dam and upstream of the reservoir. Neotropical Ichthyology, Porto Alegre, v. 19, n. 1, e200071, 2021. DOI: 10.1590/1982-0224-2020-0071 .
url http://repositorio.ufla.br/jspui/handle/1/50169
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Sociedade Brasileira de Ictiologia
publisher.none.fl_str_mv Sociedade Brasileira de Ictiologia
dc.source.none.fl_str_mv Neotropical Ichthyology
reponame:Repositório Institucional da UFLA
instname:Universidade Federal de Lavras (UFLA)
instacron:UFLA
instname_str Universidade Federal de Lavras (UFLA)
instacron_str UFLA
institution UFLA
reponame_str Repositório Institucional da UFLA
collection Repositório Institucional da UFLA
repository.name.fl_str_mv Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA)
repository.mail.fl_str_mv nivaldo@ufla.br || repositorio.biblioteca@ufla.br
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