Community size and metabolic rates of psychrophilic sulfate-reducing bacteria in Arctic marine sediments
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...
| Main Authors: | , , |
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| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
1999
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| Subjects: | |
| Online Access: | https://pure.au.dk/portal/da/publications/community-size-and-metabolic-rates-of-psychrophilic-sulfatereducing-bacteria-in-arctic-marine-sediments(3ae523f8-9e7a-46b6-bc8e-b757622c5234).html |
| Summary: | 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. |
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