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Journal Article

Numbers of bacteria and algae and their interrelations in some Amazonian waters


Schmidt,  Gottfried W.
Working Group Tropical Ecology, Max Planck Institute for Limnology, Max Planck Institute for Evolutionary Biology, Max Planck Society;

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Schmidt, G. W. (1970). Numbers of bacteria and algae and their interrelations in some Amazonian waters. Amazoniana: Limnologia et Oecologia Regionalis Systematis Fluminis Amazonas, 2(4), 393-400.

Cite as: http://hdl.handle.net/21.11116/0000-0004-4F90-1
In the Rio Solimões (Amazon River), in the Rio Negro and várzea lake (Lago do Castanho) in a three-monthly turn in the course of a year, the total numbers of bacteria and algae and the numbers of saprobiont bacteria (number of bacteria colonies) were determined and the relation between these numbers was studied. In the Rio Negro the numbers of algae and bacteria, and thus as well the relation between them, remained relatively constant and showed no significant fluctuations. The absolute quantities of these organisms were always very small. The latter was also the case in the Rio Solimões, however here, during the investigation period, more distinct alterations of the population densities of bacteria and algae occurred which were closely related to the situations in the lake. At the time of sinking water level the content in bacteria and algae which practically can originate only in the lakes connected to the river, increased considerably in the Solimões water.