Effect of waterfalls and the flood pulse on the structure of fish assemblages of the middle Xingu River in the eastern Amazon basin

BARBOSA, Thiago Augusto Pedroso; BENONE, Naraiana Loureiro; RUFFEIL, Tiago Octavio Begot; GONÇALVES, Alany Pedrosa; SOUSA, Leandro Melo de; GIARRIZZO, Tommaso; JUEN, Leandro; MONTAG, Luciano Fogaça de Assis

Artigo

Effect of waterfalls and the flood pulse on the structure of fish assemblages of the middle Xingu River in the eastern Amazon basin

The structure of fish assemblages in Neotropical rivers is influenced by a series of environmental, spatial and/or temporal factors, given that different species will occupy the habitats that present the most favourable conditions to their survival. The present study aims to identify the principal f...

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Autor principal:	BARBOSA, Thiago Augusto Pedroso
Outros Autores:	BENONE, Naraiana Loureiro, RUFFEIL, Tiago Octavio Begot, GONÇALVES, Alany Pedrosa, SOUSA, Leandro Melo de, GIARRIZZO, Tommaso, JUEN, Leandro, MONTAG, Luciano Fogaça de Assis
Grau:	Artigo
Idioma:	por
Publicado em:	Instituto Internacional de Ecologia 2017
Assuntos:	Ictiofauna Ecologia aquática Região Neotropical Rio Xingu (Médio) Natural barriers Connectivity Hydrological periods Community ecology Impacts of hydroelectric dams
Acesso em linha:	http://repositorio.ufpa.br/jspui/handle/2011/8206 http://dx.doi.org/10.1590/1519-6984.00214BM

id	ir-2011-8206
recordtype	dspace
spelling	ir-2011-82062019-12-27T05:49:31Z Effect of waterfalls and the flood pulse on the structure of fish assemblages of the middle Xingu River in the eastern Amazon basin Efeito das cachoeiras e do pulso de inundação na estrutura das assembleias de peixes do Médio Rio Xingu, Amazônia oriental BARBOSA, Thiago Augusto Pedroso BENONE, Naraiana Loureiro RUFFEIL, Tiago Octavio Begot GONÇALVES, Alany Pedrosa SOUSA, Leandro Melo de GIARRIZZO, Tommaso JUEN, Leandro MONTAG, Luciano Fogaça de Assis Ictiofauna Ecologia aquática Região Neotropical Rio Xingu (Médio) Natural barriers Connectivity Hydrological periods Community ecology Impacts of hydroelectric dams The structure of fish assemblages in Neotropical rivers is influenced by a series of environmental, spatial and/or temporal factors, given that different species will occupy the habitats that present the most favourable conditions to their survival. The present study aims to identify the principal factors responsible for the structuring of the fish assemblages found in the middle Xingu River, examining the influence of environmental, spatial, and temporal factors, in addition to the presence of natural barriers (waterfalls). For this, data were collected every three months between July 2012 and April 2013, using gillnets of different sizes and meshes. In addition to biotic data, 17 environmental variables were measured. A total of 8,485 fish specimens were collected during the study, representing 188 species. Total dissolved solids, conductivity, total suspended matter, and dissolved oxygen concentrations were the variables that had the greatest influence on the characteristics of the fish fauna of the middle Xingu. Only the barriers and hydrological periods played a significant deterministic role, resulting in both longitudinal and lateral gradients. This emphasizes the role of the connectivity of the different habitats found within the study area in the structuring of its fish assemblages. A estrutura da ictiofauna em rios neotropicais é constantemente influenciada por fatores ambientais, espaciais e/ou temporais, uma vez que as espécies tendem a ocupar ambientes com condições favoráveis à sua sobrevivência. Dessa forma, esta pesquisa tem como objetivo responder qual o principal fator responsável pela estruturação das assembleias de peixes no Médio Rio Xingu, testando a influência dos fatores ambientais, espaciais e temporais, além da presença de barreiras naturais (cachoeiras). Os dados foram coletados, trimestralmente, entre os meses de julho de 2012 e abril de 2013, utilizando redes de emalhe de tamanhos de malha variados. Foram mensuradas 17 variáveis ambientais. Foram coletados 8.485 indivíduos distribuídos em 188 espécies. Observou-se que sólidos dissolvidos totais, condutividade, material em suspensão total e oxigênio dissolvido foram as variáveis que mais influenciaram a ictiofauna do médio Rio Xingu. Observou-se que apenas as barreiras naturais e os períodos hidrológicos foram determinantes, ocorrendo tanto variação longitudinal quanto lateral, ficando claro que a conectividade entre os diferentes trechos do médio rio Xingu é de suma importância na estruturação das assembleias de peixes. BENONE, N. L.; SOUSA, L. M.; JUEN, L.; MONTAG, L. F. A. Universidade Federal do Pará 2017-04-19T13:57:07Z 2017-04-19T13:57:07Z 2015-08 Artigo de Periódico BARBOSA, Thiago Augusto Pedroso et al. Effect of waterfalls and the flood pulse on the structure of fish assemblages of the middle Xingu River in the eastern Amazon basin. Brazilian Journal Biology, São Carlos, v. 75, n. 3, supl. 1, p. 78-94, Aug. 2015. DOI: http://dx.doi.org/10.1590/1519-6984.00214BM. Disponível em: http://repositorio.ufpa.br/jspui/handle/2011/8206. Acesso em:. 1678-4375 http://repositorio.ufpa.br/jspui/handle/2011/8206 http://dx.doi.org/10.1590/1519-6984.00214BM por Brazilian Journal of Biology Acesso Aberto application/pdf Instituto Internacional de Ecologia Brasil IIE http://ref.scielo.org/qk84d9
institution	Repositório Institucional - Universidade Federal do Pará
collection	RI-UFPA
language	por
topic	Ictiofauna Ecologia aquática Região Neotropical Rio Xingu (Médio) Natural barriers Connectivity Hydrological periods Community ecology Impacts of hydroelectric dams
spellingShingle	Ictiofauna Ecologia aquática Região Neotropical Rio Xingu (Médio) Natural barriers Connectivity Hydrological periods Community ecology Impacts of hydroelectric dams BARBOSA, Thiago Augusto Pedroso Effect of waterfalls and the flood pulse on the structure of fish assemblages of the middle Xingu River in the eastern Amazon basin
topic_facet	Ictiofauna Ecologia aquática Região Neotropical Rio Xingu (Médio) Natural barriers Connectivity Hydrological periods Community ecology Impacts of hydroelectric dams
description	The structure of fish assemblages in Neotropical rivers is influenced by a series of environmental, spatial and/or temporal factors, given that different species will occupy the habitats that present the most favourable conditions to their survival. The present study aims to identify the principal factors responsible for the structuring of the fish assemblages found in the middle Xingu River, examining the influence of environmental, spatial, and temporal factors, in addition to the presence of natural barriers (waterfalls). For this, data were collected every three months between July 2012 and April 2013, using gillnets of different sizes and meshes. In addition to biotic data, 17 environmental variables were measured. A total of 8,485 fish specimens were collected during the study, representing 188 species. Total dissolved solids, conductivity, total suspended matter, and dissolved oxygen concentrations were the variables that had the greatest influence on the characteristics of the fish fauna of the middle Xingu. Only the barriers and hydrological periods played a significant deterministic role, resulting in both longitudinal and lateral gradients. This emphasizes the role of the connectivity of the different habitats found within the study area in the structuring of its fish assemblages.
format	Artigo
author	BARBOSA, Thiago Augusto Pedroso
author2	BENONE, Naraiana Loureiro RUFFEIL, Tiago Octavio Begot GONÇALVES, Alany Pedrosa SOUSA, Leandro Melo de GIARRIZZO, Tommaso JUEN, Leandro MONTAG, Luciano Fogaça de Assis
author2Str	BENONE, Naraiana Loureiro RUFFEIL, Tiago Octavio Begot GONÇALVES, Alany Pedrosa SOUSA, Leandro Melo de GIARRIZZO, Tommaso JUEN, Leandro MONTAG, Luciano Fogaça de Assis
title	Effect of waterfalls and the flood pulse on the structure of fish assemblages of the middle Xingu River in the eastern Amazon basin
title_short	Effect of waterfalls and the flood pulse on the structure of fish assemblages of the middle Xingu River in the eastern Amazon basin
title_full	Effect of waterfalls and the flood pulse on the structure of fish assemblages of the middle Xingu River in the eastern Amazon basin
title_fullStr	Effect of waterfalls and the flood pulse on the structure of fish assemblages of the middle Xingu River in the eastern Amazon basin
title_full_unstemmed	Effect of waterfalls and the flood pulse on the structure of fish assemblages of the middle Xingu River in the eastern Amazon basin
title_sort	effect of waterfalls and the flood pulse on the structure of fish assemblages of the middle xingu river in the eastern amazon basin
publisher	Instituto Internacional de Ecologia
publishDate	2017
url	http://repositorio.ufpa.br/jspui/handle/2011/8206 http://dx.doi.org/10.1590/1519-6984.00214BM
_version_	1832604030038179840
score	11.755432

Effect of waterfalls and the flood pulse on the structure of fish assemblages of the middle Xingu River in the eastern Amazon basin

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