SciELO - Scientific Electronic Library Online

 
vol.66 número2BEfeito da competição local por acasalamentos na razão sexual de vespas de figoDistribuição espaço-temporal de macroinvertebrados bentônicos em um rio do sudeste brasileiro índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Journal

Artigo

Indicadores

Links relacionados

Compartilhar


Brazilian Journal of Biology

versão impressa ISSN 1519-6984versão On-line ISSN 1678-4375

Resumo

BISPO, P. C.; OLIVEIRA, L. G.; BINI, L. M.  e  SOUSA, K. G.. Ephemeroptera, Plecoptera and Trichoptera assemblages from riffles in mountain streams of Central Brazil: environmental factors influencing the distribution and abundance of immatures. Braz. J. Biol. [online]. 2006, vol.66, n.2b, pp.611-622. ISSN 1519-6984.  http://dx.doi.org/10.1590/S1519-69842006000400005.

The 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 (°C), water velocity (m/s), discharge (m3/s), electric conductivity (µS/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).

Palavras-chave : Ephemeroptera; Plecoptera; Trichoptera; lotic environments; larval distribution.

        · resumo em Português     · texto em Inglês     · Inglês ( pdf )

 

Creative Commons License Todo o conteúdo deste periódico, exceto onde está identificado, está licenciado sob uma Licença Creative Commons