Epsilonproteobacteria represent the major portion of chemoautotrophic bacteria in sulfidic waters of pelagic redoxclines of the Baltic and Black Seas.

ABSTRACT: Recent studies have indicated that chemoautotrophic Epsilonproteobacteria might play an important role, especially as anaerobic or microaerophilic dark CO(2)-fixing organisms, in marine pelagic redoxclines. However, knowledge of their distribution and abundance as actively CO(2)-fixing microorganisms in pelagic redoxclines is still deficient. We determined the contribution of Epsilonproteobacteria to dark CO(2) fixation in the sulfidic areas of central Baltic Sea and Black Sea redoxclines by combining catalyzed reporter deposition-fluorescence in situ hybridization with microautoradiography using [(14)C]bicarbonate and compared it to the total prokaryotic chemoautotrophic activity. In absolute numbers, up to 3 x 10(5) (14)CO(2)-fixing prokaryotic cells ml(-1) were enumerated in the redoxcl

SUBMITTER: Grote J 

PROVIDER: S-EPMC2607176 | biostudies-literature | 2008 Dec

REPOSITORIES: biostudies-literature