Incorporation of glucose under anoxic conditions by bacterioplankton from coastal North Sea surface waters

Article Abstract:

An investigation on whether different phylogenetic groups of heterotrophic picoplankton from the coastal North Sea were able to take up a simple carbon source under anoxic conditions is presented. The results suggest that the ability to incorporate substrates anaerobically is widespread in pelagic marine bacteria belonging to different phylogenetic groups.

Analysis, Genetic aspects, Marine bacteria, Phylogeny, Anaerobic respiration

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Blooms of single bacterial species in a coastal lagoon of the southwestern Atlantic Ocean

Article Abstract:

The seasonal differences in community structure and activity of the planktonic bacterial assemblage were investigated in the freshwater and brackish-water zones of a shallow coastal lagoon of the southwestern Atlantic Ocean. It was found that the pelagic zone of the studied lagoon harbored repeated short-term blooms of single bacterial species.

Atlantic Ocean, Environmental aspects, Pelagic zone

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Concentration-dependent patterns of leucine incorporation by coastal picoplankton

Article Abstract:

The incorporation patterns of leucine in four microbial lineages from the coastal North Sea at concentrations between 0.1 and 100 nM before and during a spring phytoplankton bloom are investigated. The findings suggest that the contribution of microbial taxa to the turnover of particular substrates might be concentration dependent.

Microbial growth, Leucine, Chemical properties

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