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Brazilian Journal of Biology

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

Resumo

PICAPEDRA, P. H. S.; FERNANDES, C.  e  LANSAC-TOHA, F. A.. Zooplankton community in the Upper Parnaíba River (Northeastern, Brazil). Braz. J. Biol. [online]. 2017, vol.77, n.2, pp.402-412.  Epub 15-Ago-2016. ISSN 1519-6984.  http://dx.doi.org/10.1590/1519-6984.20215.

The objective of the present work is to evaluate the seasonal patterns of species richness and abundance of the zooplankton community in a semi-arid river, Northeastern of Brazil. Zooplankton samples were taken in four hydrological periods along the Upper Parnaíba River: April (low), August (dry), November (rising) 2013 and January (flood) 2014. The zooplankton community consisted of 125 species; the testate amoebae was the most species-rich (56 species) and the most abundant group (71.5%) of total zooplankton abundance. Season-specific differences were highly significant. The overall zooplankton richness and abundance was significantly higher during the low (71 species) and flood (878.47 ind.m–3) period, respectively. The hydrological regime was important in structuring the zooplankton community, emphasising the importance of the Parnaíba River and its seasonal variation for biodiversity conservation in the Brazilian semi-arid region.

Palavras-chave : potamoplankton; large rivers; semi-arid; environmental variables; seasonality.

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