Data/hora: 02/06/2024 16:24:42

Provedor de dados: | 83
País: | Brazil
Título: | From forests to cattail: how does the riparian zone influence stream fish?
Autores: | Casatti,Lilian; Teresa,Fabrício Barreto; Gonçalves-Souza,Thiago; Bessa,Eduardo; Manzotti,Angelo Rodrigo; Gonçalves,Cristina da Silva; Zeni,Jaquelini de Oliveira.
Data: | 2012-01-01
Ano: | 2012
Palavras-chave: | Biotic homogenization; CWM analysis; Functional composition; Riparian forest; Species composition.
Resumo: | The aim of this study was to verify whether taxonomic and functional composition of stream fishes vary under three different preservation conditions of riparian zone: preserved (PRE), intermediate condition (INT), and degraded (DEG). Five stream stretches representing each condition were selected. Samples were taken from each stream in three occasions during the dry seasons from 2004 to 2007. Electro fishing (PRE and INT), sieves, dip nets, and hand seines (DEG) were used according to the characteristics of each sampled site. Overall, 46 species were registered. Differences in the taxonomic and functional species composition among groups were found, following the condition of riparian zones. The ichthyofauna recorded in the PRE was typical to pristine environments, consisting of species with specialized habits, notably benthic insectivores, intolerant, and rheophilics. In the INT group, replacement of riparian forest with shrubs and/or grasses created environmental conditions which favor the occurrence of tolerant species but also harbor a residual fauna of sensitive species. DEG streams presented mostly detritivores, tolerant, small sized fishes which occupy the surface and preferred slow water flux. Changes in the species composition were represented by the occurrence and dominance of tolerant species in detriment of the more sensitive and specialist species, following the gradient of degradation in the riparian zone. Forested streams act as unique habitats to many specialized species and it can be presumable that the degradation of riparian vegetation can generate biotic homogenization which may reduce species diversity and ecosystem services.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252012000100020
Editor: | Sociedade Brasileira de Ictiologia
Relação: | 10.1590/S1679-62252012000100020
Formato: | text/html
Fonte: | Neotropical Ichthyology  v.10 n.1 2012
Fonte: | info:eu-repo/semantics/openAccess