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Journal Article

Community size and metabolic rates of psychrophilic sulfate-reducing bacteria in Arctic marine sediments

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Knoblauch,  Christian
Department of Biogeochemistry, Max Planck Institute for Marine Microbiology, Max Planck Society;

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Jørgensen,  Bo Barker
Department of Biogeochemistry, Max Planck Institute for Marine Microbiology, Max Planck Society;

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Harder,  Jens
Department of Microbiology, Max Planck Institute for Marine Microbiology, Max Planck Society;

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Citation

Knoblauch, C., Jørgensen, B. B., & Harder, J. (1999). Community size and metabolic rates of psychrophilic sulfate-reducing bacteria in Arctic marine sediments. Applied and Environmental Microbiology, 65(9), 4230-4233.


Cite as: https://hdl.handle.net/21.11116/0000-0005-485E-2
Abstract
The numbers of sulfate reducers in two Arctic sediments within situ temperatures of 2.6 and -1.7 degrees C were determined. Most-probable-number counts were higher at 10 degrees C than at 20 degrees C, indicating the predominance of a psychrophilic community. Mean specific sulfate reduction rates of 19 isolated psychrophiles were compared to corresponding rates of 9 marine, mesophilic sulfate-reducing bacteria. The results indicate that, as a physiological adaptation to the permanently cold Arctic environment, psychrophilic sulfate reducers have considerably higher specific metabolic rates than their mesophilic counterparts at similarly low temperatures.