Variation of α and β Diversity of Fish Assemblages in an UpstreamDownstream Gradient of a Tropical River, Central Brazil
Journal Title: Fronteiras: Journal of Social, Technological and Environmental Science - Year 2014, Vol 3, Issue 1
Abstract
This study was developed along the main channel of João Leite River, Upper Paraná River Basin, Goiás State. Three stretches with 500m length were predetermined and fish species sampled in each on them Fish sampling was carried during dry season using a set of nets with different mesh sizes (12, 15, 20, 25, 30, 35, 40 and 50mm between knots) and five traps. The α diversity was verified through ecological descriptors such as species richness, abundance, Shannon-Wiener index and evenness while β diversity by Morisita-Horn index. Species richness and diversity increased towards upstream-downstream as expected by river continuum concept. Species composition turnover between the stretch localized in the headwater (JL1) and that in the river mouth (JL3) may be related with hydrological and morphological conditions of the environment and with the habitat type explored by species.
Authors and Affiliations
Andréia Oliveira de Santana| Mestre em Ecologia e Evolução pela Universidade Federal de Goiás (Goiás/Brasil), Francisco Leonardo Tejerina-Garro| Doutor em Ecologia de Sistemas Aquáticos Continentais pela Université Montpellier 2 - Sciences et Techniques (França). Docente da Pontifícia Universidade Católica de Goiás, do Centro Universitário de Anápolis – UniEVANGÉLICA e da Universidade Federal de Goiás (Goiás/Brasil), Rodrigo Assis de Carvalho| Doutor em Ecologia e Evolução pela Universidade Federal de Goiás (Goiás/Brasil)
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- EP ID EP15384
- DOI 10.21664/2238-8869.2014v3i1.p106-118
- Views 340
- Downloads 14
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