Autor(es):
Bordignon, Carolina Rodrigues [UNESP] ; Casatti, Lilian [UNESP] ; Pérez-Mayorga, María Angélica [UNESP] ; Teresa, Fabrício Barreto ; Brejão, Gabriel Lourenço [UNESP]
Data: 2018
Identificador Persistente: http://hdl.handle.net/11449/177506
Origem: Oasisbr
Assunto(s): Amazon forest; Conservation; Ecomorphology; Functional diversity; Habitat use; Amazon forest; Amazon forest; Conservation; Conservation; Ecomorphology; Ecomorphology; Functional diversity; Functional diversity; Habitat use; Habitat use
Descrição
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The functional structure of communities is commonly measured by the variability in functional traits, which may demonstrate complementarity or redundancy patterns. In this study, we tested the influence of environmental variables on the functional structure of fish assemblages in Amazonian streams within a deforestation gradient. We calculated six ecomorphological traits related to habitat use from each fish species, and used them to calculate the net relatedness index (NRI) and the nearest taxon index (NTI). The set of species that used the habitat differently (complementary or overdispersed assemblages) occurred in sites with a greater proportion of forests. The set of species that used the habitat in a similar way (redundant or clustered assemblages) occurred in sites with a greater proportion of grasses in the stream banks. Therefore, the deforestation of entire watersheds, which has occurred in many Amazonian regions, may be a central factor for the functional homogenization of fish fauna.
Universidade Estadual Paulista (UNESP), Departamento de Zoologia e Botânica, Rua Cristóvão Colombo 2.265
Universidade Estadual de Goiás (UEG), Unidade Universitária de Ciências Exatas e Tecnológicas, BR-153, 3.105
Universidade Estadual Paulista (UNESP), Departamento de Zoologia e Botânica, Rua Cristóvão Colombo 2.265
