Bacteria in post-glacial freshwater sediments

Article Abstract:

Sediment bacteria play an important part in benthic food webs, nutrient cycling and decomposition of organic matter. Prokaryote communities found in post-glacial profundal freshwater sediment have been examined for culturability, viability and community structure. Many cells in upper sediments were metabolically active. Sulphate-reducing bacteria were not detected below 20 cm, but isolates showing denitrifying activity were detected at all depths.

Observations, Bacteria, Freshwater ecology, Sedimentation and deposition, Deposition (Geology)

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Phylogenetic differentiation of two closely related Nitrosomonas spp. that inhabit different sediment environments in an oligotrophic freshwater lake

Article Abstract:

Research is conducted on the ammonia-oxidizing bacteria population in water and sediment seasonal samples recovered from a temperate oligotrophic lake. The presence of nitrosomonad DNA of the Nitrosomonas europaea-Nitrosomonas eutropha lineage in the lake is discussed.

United Kingdom, Physiological aspects, Environmental aspects, Microbial ecology, Phylogeny, Lakes, Sedimentary structures

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Mosaic plasmids and mosaic replicons: evolutionary lessons from the analysis of genetic diversity in IncFII-related replicons

Article Abstract:

The nucleotide sequences of the alpha replicons from the pGSGH500 and pLV1402 plasmids are described. They are related to a group of replicons in the IncFII family and the broader family of antisense-control-regulated replicons .

Plasmids

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