Produção Nacional
Revisado por pares
Ephemeroptera, Plecoptera and Trichoptera assemblages from riffles in mountain streams of Central Brazil: environmental factors influencing the distribution and abundance of immatures
2006; Instituto Internacional de Ecologia (Brazil); Volume: 66; Issue: 2b Linguagem: Inglês
10.1590/s1519-69842006000400005
ISSN1678-4375
AutoresPitágoras C. Bispo, Leandro Gonçalves Oliveira, Luis Maurício Bini, Kuillder Sousa,
Tópico(s)Fish biology, ecology, and behavior
ResumoThe influence of environmental factors on the distribution of Ephemeroptera, Plecoptera and Trichoptera (EPT) immatures was investigated in streams of the Brazilian Center-West (Serra do Pireneus, Pirenópolis, State of Goiás). The insects were sampled by lifting the stones in front of a sieve (0.5 mm mesh) and then removing the insects from both the stone and the sieve. Sampling was carried out for 1 h at 5 collection sites over a period of 14 months. Air and water temperature (degrees C), water velocity (m/s), discharge (m(3)/s), electric conductivity (microS/cm), pH, and rainfall (mm) were also recorded. In general, we may state that altitude, hydrologic classification (order) and vegetation cover were the most important factors explaining the distribution of Ephemeroptera, Plecoptera and Trichoptera immatures. The influence of the rainfall on the temporal variation of the abundance of insects was stronger in stream segments of medium order (3rd, 4th order) compared to smaller streams (first order).
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