Composição do zooplâncton em cinco lagos da Amazônia Central

Abstract

A study of the species composition, satnding-stock and diversity of the zooplancton groups Rotifera. Cladocera and Copepoda. was conducted in five lakes In the Central Amazonian region. The lakes present distinct physical, chemical and biological parameters which allows for distinguishing two groups: On the first group, caracterized by the lakes which present greater concentration of ions, greater availability of nutrients, and greater diversity of zooplancton species are the "várzea" lakes. Castanho, Redondo and Jacaretinga. On the second group, caracterized by the lakes which present low concentrations of ions, few nutrients, and a low diversity of zooplancton species are the "terra-firme" lakes, Cristalino and tarumã-Mirim. The structure of the zooplancton comunities in Amazonian lakes is periodically altered by the inundation of the rivers.