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JPR Advance Access originally published online on December 1, 2005
Journal of Plankton Research 2006 28(2):181-193; doi:10.1093/plankt/fbi111
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© The Author 2005. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

Phytoplankton community of floodplain lakes of the Araguaia River, Brazil, in the rainy and dry seasons

J. C. Nabout*, I. S. Nogueira and L. G. Oliveira

Departamento de Biologia, Laboratório de Limnologia, ICB I, Universidade Federal de Goiás, C.P. 131 Campus II, Goiânia, GO 74001-970, Brazil

* Corresponding Author: naboutjc{at}hotmail.com

Received July 21, 2005; accepted in principle October 12, 2005; accepted for publication November 30, 2005; published online December 1, 2005
Communicating editor: K. J. Flynn

This work analyses the attributes of the phytoplankton community (species richness, biovolume, diversity, equitability, abundance, dominance and size structure) associated with some physical, chemical and climatic variables of floodplain lakes of the Araguaia River, central Brazil, in the rainy and dry seasons of 2000 and 2001. The lakes in 2000 and 2001 presented different limnological characteristics between the periods of high and low water. The phytoplankton comprised 292 taxa, mainly Chlorophyceae and nanoplankton. In the dry seasons of both years, the functional group Y (Cryptophyceae) was the most prominent association. In high-water periods, different functional groups dominated the lakes. The canonical correspondence analysis (CCA) demonstrated a separation between the rainy and dry seasons of both years. The high and low water presented different dynamics in 2 years due to the influence of the flood pulse.


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