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Journal Article

Bacterial biodynamics in Lago Tupé, a Central Amazonian black water "Ria Lake


Rai,  Hakumat
Department Ecophysiology, Max Planck Institute for Limnology, Max Planck Institute for Evolutionary Biology, Max Planck Society;

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Rai, H., & Hill, G. (1981). Bacterial biodynamics in Lago Tupé, a Central Amazonian black water "Ria Lake. Archiv für Hydrobiologie / Supplementband, 58(4), 420-468.

Cite as: https://hdl.handle.net/21.11116/0000-0005-6BF7-D
Bacteriological studies on Lago Tupé, a black water "Ria Lake" (blocked valley lake)'
are presented here as a conclusion to the physical and chemical studies (Rai and Hill, 1980). Heavy rains and the Rio Negro brings in the labile nutrients which are utilized by the bacteria (mostly oligocarbophils). Algal growth is bimodal and occurs at low water levels when solar intensity increases. As the algal death produces an autochthonous carbon source, the heterotrophic activity increases. The lake is seen as a pool of regeneration that supplies the river with a microbiologically dynamic population during the annual periodic rise. This ongoing process of growth and exchange is apparently a defining characteristic of the central Amazonian Ria lake and undercovers the importance of the systemic approach. Lago Tupé is compared with polar and temperate systems in order to point out those characteristics which are unique to the Central Amazon.