Comparative study of the zooplankton composition of two lacustrine ecosystems in Southwestern Amazonia

The zooplankton communities of two lacustrine ecosystems in southwestern Amazonia (Lago Amapá and Lago Pirapora) were studied based on samples collected over an 11-month period. The general aim of the present work was to contribute to the knowledge of the zooplankton fauna in southwestern Amazonia,...

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Bibliographic Details
Published in:Acta Scientiarum. Biological Sciences
Main Author: Keppeler, Erlei Cassiano
Other Authors: Universidade Estadual Paulista (UNESP)
Format: Other/Unknown Material
Language:English
Published: 2014
Subjects:
Amazonia
Composition
Zooplankton
rain
Brazil
lake ecosystem
limnology
nonhuman
river ecosystem
seasonal variation
species differentiation
taxonomic identification
Brachionidae
Ceriodaphnia cornuta
Copepoda
Diaphanosoma
Filinia
Filinia opoliensis
Hexarthra intermedia
Keratella cochlearis
Moina minuta
Rotifera
Copepods
Rotifer
Online Access:http://acervodigital.unesp.br/handle/11449/67347
http://hdl.handle.net/11449/67347
https://doi.org/10.4025/actascibiolsci.v25i2.2042
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Summary:The zooplankton communities of two lacustrine ecosystems in southwestern Amazonia (Lago Amapá and Lago Pirapora) were studied based on samples collected over an 11-month period. The general aim of the present work was to contribute to the knowledge of the zooplankton fauna in southwestern Amazonia, by studying the occurrence of certain species; and to improve the knowledge of the Rio Acre tributaries. The total number of taxa included 38 species of rotifers, 6 cladocerans and 7 copepods. Most of the species were from the rotifer family Brachionidae. Jaccard's similarity index was similar for the two lakes at 0.6964 The constancy index defined the species Keratella cochlearis, Filinia cf. terminate, Filinia opoliensis, Hexarthra intermedia braziliensis, Ceriodaphnia cornuta, Moina minuta, Diaphanosoma spinulosnm, and immature forms (nauplii and copepodites) as the constant in these lakes. The presence of zooplankton with higher number of species occupying the middle depths, during morning and night periods.

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