TEMPORAL CHANGES ON THE FUNCTIONAL STRUCTURE OF THE FISH ASSEMBLAGES DURING ELEVEN YEARS OF FORMATION OF A RESERVOIR OF THE MIDDLE TOCANTINS RIVER, BRAZIL
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Biota Amazônia |
Texto Completo: | https://periodicos.unifap.br/index.php/biota/article/view/4412 |
Resumo: | The damming of rivers for the construction of hydroelectric dams represents an important generator of environmental impact in the aquatic ecosystem, affecting the composition and the diversity of the fish fauna. This work aims to evaluate the temporal changes in the functional structure of fish assemblages in the Tocantins River before and after the construction of the Lajeado dam. Were used fourteen functional attributes measured from the fauna of fish collected with gillnet during eleven hydrological periods. Functional attributes related to size, body size, habitat use and reproductive strategy were more sensitive to the formation of fifteen functional groups. In general, there was an increase in the abundance of all groups after the reservoir, with more occurrence of small species, fusiform or compressed body and pelagic or benthopelagic habitat. Demersal habitat species, long-distance migrators and body size large were the most affected by the reservoir, with a strong reduction of abundance (less than 1% of the total). The analysis based on the construction of functional groups helps to identify the traits that are more sensitive to the new condition imposed by the reservoirs. So that the upstream area, of lotic nature, are recognized the priority conservation areas and free of new hydroelectric projects, in order to ensure the survival of species that share the most sensitive traits.Keywords: Tocantins River; reservoirs; environmental impact; neotropical fish; functional diversity. |
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Biota Amazônia |
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TEMPORAL CHANGES ON THE FUNCTIONAL STRUCTURE OF THE FISH ASSEMBLAGES DURING ELEVEN YEARS OF FORMATION OF A RESERVOIR OF THE MIDDLE TOCANTINS RIVER, BRAZILALTERAÇÕES TEMPORAIS SOBRE A ESTRUTURA FUNCIONAL DAS ASSEMBLEIAS DE PEIXES DURANTE ONZE ANOS DE FORMAÇÃO DE UM RESERVATÓRIO DO MÉDIO RIO TOCANTINS, BRASILreservatórios, peixes, diversidade funcional, atributos, rios amazônicosThe damming of rivers for the construction of hydroelectric dams represents an important generator of environmental impact in the aquatic ecosystem, affecting the composition and the diversity of the fish fauna. This work aims to evaluate the temporal changes in the functional structure of fish assemblages in the Tocantins River before and after the construction of the Lajeado dam. Were used fourteen functional attributes measured from the fauna of fish collected with gillnet during eleven hydrological periods. Functional attributes related to size, body size, habitat use and reproductive strategy were more sensitive to the formation of fifteen functional groups. In general, there was an increase in the abundance of all groups after the reservoir, with more occurrence of small species, fusiform or compressed body and pelagic or benthopelagic habitat. Demersal habitat species, long-distance migrators and body size large were the most affected by the reservoir, with a strong reduction of abundance (less than 1% of the total). The analysis based on the construction of functional groups helps to identify the traits that are more sensitive to the new condition imposed by the reservoirs. So that the upstream area, of lotic nature, are recognized the priority conservation areas and free of new hydroelectric projects, in order to ensure the survival of species that share the most sensitive traits.Keywords: Tocantins River; reservoirs; environmental impact; neotropical fish; functional diversity.O represamento de rios para a construção de hidrelétricas representa um importante gerador de impacto ambiental no ecossistema aquático, afetando a composição e a diversidade da fauna de peixes. Este trabalho tem como objetivo avaliar as mudanças temporais na estrutura funcional das assembleias de peixes no rio Tocantins antes e após a construção da barragem de Lajeado. Foram utilizados quatorze atributos funcionais mensurados da fauna de peixes coletadas com malhadeira durante 11 períodos hidrológicos. Os atributos funcionais relacionados ao tamanho, forma do corpo, uso do habitat e estratégia reprodutiva foram mais sensíveis à formação de 15 grupos funcionais. Em geral, houve um incremento na abundância de todos os grupos após o barramento, com maior ocorrência de espécies de pequeno porte, corpo fusiforme ou comprimido e habitat pelágico ou bentopelágico. Os táxons de habitat demersal, migradores de longa distância e de grande porte foram os mais afetados pelo barramento, com forte redução da abundância (menos de 1% do total). A análise baseada na construção de grupos funcionais auxilia na identificação dos atributos que são mais sensíveis à nova condição imposta pelos reservatórios. De modo que as regiões a montante, de natureza lótica, sejam reconhecidas como áreas prioritárias de conservação e livres de novos projetos hidrelétricos, com intuito de garantir a sobrevivência de espécies que compartilham os atributos mais sensíveis.Palavras-chave: rio Tocantins, reservatórios, impacto ambiental, peixes neotropicais, diversidade funcional.Universidade Federal do AmapáNúcleo de Estudos Ambientais (Neamb/UFT)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Pinto, Mac David da SilvaDória, Carolina Rodrigues da CostaMarques, Elineide Eugênio2019-03-31info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArtigo Avaliado pelos Paresapplication/pdfhttps://periodicos.unifap.br/index.php/biota/article/view/441210.18561/2179-5746/biotaamazonia.v9n1p17-21Biota Amazônia (Biote Amazonie, Biota Amazonia, Amazonian Biota); v. 9, n. 1 (2019); 17-212179-5746reponame:Biota Amazôniainstname:Universidade Federal do Amapá (UNIFAP)instacron:UNIFAPporhttps://periodicos.unifap.br/index.php/biota/article/view/4412/v9n1p17-21.pdfhttps://periodicos.unifap.br/index.php/biota/article/downloadSuppFile/4412/705Amazônia Legal; rio TocantinscronologicaQuantitativaDireitos autorais 2019 Biota Amazônia (Biote Amazonie, Biota Amazonia, Amazonian Biota)http://creativecommons.org/licenses/by/4.0info:eu-repo/semantics/openAccess2019-05-28T18:48:42Zoai:ojs.pkp.sfu.ca:article/4412Revistahttp://periodicos.unifap.br/index.php/biotaONGhttps://periodicos.unifap.br/index.php/biota/oai||juliosa@unifap.br2179-57462179-5746opendoar:2019-05-28T18:48:42Biota Amazônia - Universidade Federal do Amapá (UNIFAP)false |
dc.title.none.fl_str_mv |
TEMPORAL CHANGES ON THE FUNCTIONAL STRUCTURE OF THE FISH ASSEMBLAGES DURING ELEVEN YEARS OF FORMATION OF A RESERVOIR OF THE MIDDLE TOCANTINS RIVER, BRAZIL ALTERAÇÕES TEMPORAIS SOBRE A ESTRUTURA FUNCIONAL DAS ASSEMBLEIAS DE PEIXES DURANTE ONZE ANOS DE FORMAÇÃO DE UM RESERVATÓRIO DO MÉDIO RIO TOCANTINS, BRASIL |
title |
TEMPORAL CHANGES ON THE FUNCTIONAL STRUCTURE OF THE FISH ASSEMBLAGES DURING ELEVEN YEARS OF FORMATION OF A RESERVOIR OF THE MIDDLE TOCANTINS RIVER, BRAZIL |
spellingShingle |
TEMPORAL CHANGES ON THE FUNCTIONAL STRUCTURE OF THE FISH ASSEMBLAGES DURING ELEVEN YEARS OF FORMATION OF A RESERVOIR OF THE MIDDLE TOCANTINS RIVER, BRAZIL Pinto, Mac David da Silva reservatórios, peixes, diversidade funcional, atributos, rios amazônicos |
title_short |
TEMPORAL CHANGES ON THE FUNCTIONAL STRUCTURE OF THE FISH ASSEMBLAGES DURING ELEVEN YEARS OF FORMATION OF A RESERVOIR OF THE MIDDLE TOCANTINS RIVER, BRAZIL |
title_full |
TEMPORAL CHANGES ON THE FUNCTIONAL STRUCTURE OF THE FISH ASSEMBLAGES DURING ELEVEN YEARS OF FORMATION OF A RESERVOIR OF THE MIDDLE TOCANTINS RIVER, BRAZIL |
title_fullStr |
TEMPORAL CHANGES ON THE FUNCTIONAL STRUCTURE OF THE FISH ASSEMBLAGES DURING ELEVEN YEARS OF FORMATION OF A RESERVOIR OF THE MIDDLE TOCANTINS RIVER, BRAZIL |
title_full_unstemmed |
TEMPORAL CHANGES ON THE FUNCTIONAL STRUCTURE OF THE FISH ASSEMBLAGES DURING ELEVEN YEARS OF FORMATION OF A RESERVOIR OF THE MIDDLE TOCANTINS RIVER, BRAZIL |
title_sort |
TEMPORAL CHANGES ON THE FUNCTIONAL STRUCTURE OF THE FISH ASSEMBLAGES DURING ELEVEN YEARS OF FORMATION OF A RESERVOIR OF THE MIDDLE TOCANTINS RIVER, BRAZIL |
author |
Pinto, Mac David da Silva |
author_facet |
Pinto, Mac David da Silva Dória, Carolina Rodrigues da Costa Marques, Elineide Eugênio |
author_role |
author |
author2 |
Dória, Carolina Rodrigues da Costa Marques, Elineide Eugênio |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Núcleo de Estudos Ambientais (Neamb/UFT) Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) |
dc.contributor.author.fl_str_mv |
Pinto, Mac David da Silva Dória, Carolina Rodrigues da Costa Marques, Elineide Eugênio |
dc.subject.none.fl_str_mv |
|
dc.subject.por.fl_str_mv |
reservatórios, peixes, diversidade funcional, atributos, rios amazônicos |
topic |
reservatórios, peixes, diversidade funcional, atributos, rios amazônicos |
description |
The damming of rivers for the construction of hydroelectric dams represents an important generator of environmental impact in the aquatic ecosystem, affecting the composition and the diversity of the fish fauna. This work aims to evaluate the temporal changes in the functional structure of fish assemblages in the Tocantins River before and after the construction of the Lajeado dam. Were used fourteen functional attributes measured from the fauna of fish collected with gillnet during eleven hydrological periods. Functional attributes related to size, body size, habitat use and reproductive strategy were more sensitive to the formation of fifteen functional groups. In general, there was an increase in the abundance of all groups after the reservoir, with more occurrence of small species, fusiform or compressed body and pelagic or benthopelagic habitat. Demersal habitat species, long-distance migrators and body size large were the most affected by the reservoir, with a strong reduction of abundance (less than 1% of the total). The analysis based on the construction of functional groups helps to identify the traits that are more sensitive to the new condition imposed by the reservoirs. So that the upstream area, of lotic nature, are recognized the priority conservation areas and free of new hydroelectric projects, in order to ensure the survival of species that share the most sensitive traits.Keywords: Tocantins River; reservoirs; environmental impact; neotropical fish; functional diversity. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-03-31 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Artigo Avaliado pelos Pares |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://periodicos.unifap.br/index.php/biota/article/view/4412 10.18561/2179-5746/biotaamazonia.v9n1p17-21 |
url |
https://periodicos.unifap.br/index.php/biota/article/view/4412 |
identifier_str_mv |
10.18561/2179-5746/biotaamazonia.v9n1p17-21 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://periodicos.unifap.br/index.php/biota/article/view/4412/v9n1p17-21.pdf https://periodicos.unifap.br/index.php/biota/article/downloadSuppFile/4412/705 |
dc.rights.driver.fl_str_mv |
Direitos autorais 2019 Biota Amazônia (Biote Amazonie, Biota Amazonia, Amazonian Biota) http://creativecommons.org/licenses/by/4.0 info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Direitos autorais 2019 Biota Amazônia (Biote Amazonie, Biota Amazonia, Amazonian Biota) http://creativecommons.org/licenses/by/4.0 |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.coverage.none.fl_str_mv |
Amazônia Legal; rio Tocantins cronologica Quantitativa |
dc.publisher.none.fl_str_mv |
Universidade Federal do Amapá |
publisher.none.fl_str_mv |
Universidade Federal do Amapá |
dc.source.none.fl_str_mv |
Biota Amazônia (Biote Amazonie, Biota Amazonia, Amazonian Biota); v. 9, n. 1 (2019); 17-21 2179-5746 reponame:Biota Amazônia instname:Universidade Federal do Amapá (UNIFAP) instacron:UNIFAP |
instname_str |
Universidade Federal do Amapá (UNIFAP) |
instacron_str |
UNIFAP |
institution |
UNIFAP |
reponame_str |
Biota Amazônia |
collection |
Biota Amazônia |
repository.name.fl_str_mv |
Biota Amazônia - Universidade Federal do Amapá (UNIFAP) |
repository.mail.fl_str_mv |
||juliosa@unifap.br |
_version_ |
1800218371229220864 |