Journal of Plankton Research Vol.22 no.1 pp.63-76, 2000
© Oxford University Press 2000
Phytoplankton in an Amazonian flood-plain lake (Lago Batata, Brasil): diel variation and species strategies
Laboratório de Ficologia, Depto. de Botânica, Museu Nacional, Universidade Federal do Rio de Janeiro, Quinta da Boa Vista, São Cristovão, Rio de Janeiro, 20 940–040, Brasil
1 Present address: Laboratório de Ecologia do Plâncton, Depto. de Ecologia, Instituto de Biologia, Universidade Federal do Rio de Janeiro, Ilha do Fundão, Rio de Janeiro, 21940–540, Brasil
Phytoplankton diel variations in an Amazonian flood-plain lake (Lago Batata) were studied quarterly for 1 year, according to the hydrometric level fluctuation of the Trombetas river (39.7–47.0 m over sea level), to which the lake is permanently connected. Hydrological and hydrographic conditions determined mixing patterns of the water column and phytoplankton distribution. When the lake is deep (>4.0 m), sparse phytoplankton communities are found at the bottom, by thermal discontinuities, and may remain so for a short duration (days). When the lake is shallow (<4.0 m), mixing of the waters ensures a nearly even distribution of organisms throughout the water column. The weak stability of stratification is a major influence on the distribution of phytoplankton population densities in this shallow flushed lake. The highest phytoplankton densities during the second part of the day, mentioned in the literature, are observed only during decreasing water level. During the other phases of the hydrological cycle (increasing, high and low water levels), no differences in phytoplankton population density were observed throughout the diel cycle. Assemblages, or groups of descriptor species of systems having similar features, have recently been proposed. Assemblages of flushing-tolerant nano-algae (X1) and of mixing-dependent species (T, S) have shown that the physical properties of the environment were often the strongest determinants of the phytoplankton strategies.
CiteULike 
Connotea 
Del.icio.us What's this?
This article has been cited by other articles:
|
|
 |
|
  J. C. Nabout, I. S. Nogueira, and L. G. Oliveira Phytoplankton community of floodplain lakes of the Araguaia River, Brazil, in the rainy and dry seasons J. Plankton Res., February 1, 2006; 28(2): 181 - 193. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
S. Romo and M.-J. Villena Phytoplankton strategies and diversity under different nutrient levels and planktivorous fish densities in a shallow Mediterranean lake J. Plankton Res., December 1, 2005; 27(12): 1273 - 1286. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
C. S. Reynolds, V. Huszar, C. Kruk, L. Naselli-Flores, and S. Melo Towards a functional classification of the freshwater phytoplankton J. Plankton Res., May 1, 2002; 24(5): 417 - 428. [Abstract] [Full Text] [PDF]
|
|