Phylogenetic diversity of archaea and bacteria in the anoxic zone of a Meromictic lake (Lake Pavin, France)

Article Abstract:

A study was carried out to determine the compositions of archaeal and bacterial populations at different depths in the anoxic zone of the water column in Lake Pavin, a freshwater permanently stratified mountain lake in France. The findings have disclosed that the anoxic communities have evolved since the formation of Lake Pavin 6,000 years ago, which is not much influenced by the external environment except for the sedimentation fluxes, and the microbial communities that inhabit the anoxic zone of Lake Pavin are rich in new types of bacteria.

Analysis, Evaluation, Physiological aspects, Phylogeny, Microbial colonies

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Anaerobic microbial communities in Lake Pavin, a unique meromictic Lake in France

Article Abstract:

The Bacteria and Archaea from the meromictic Lake Pavin are analyzed in samples collected along a vertical profile in the anoxic monimolimnion and are compared to those in samples from the oxic mixolimnion. Results demonstrate significant differences in the compositions of microbial assemblages at different depths under stratified conditions and reveal distinct diversity patterns in oxic versus anoxic water zones of the lake and within the anoxic depth profile.

Anaerobiosis, Microbial ecology

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Genetic diversity of small eukaryotes in lakes differing by their tropic status

Article Abstract:

Small eukaryotes diversity is determined by sequencing cloned 18S rRNA genes in three libraries from lakes of differing tropical status. The result reveals that the small eukaryote community composition may differ as a function of tropical status and certain lineage could be detected only in one single ecosystem.

Genetic aspects, Eukaryotes, Ribosomal RNA, Ecological research

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