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

Abstract

The numbers of sulfate reducers in two Arctic sediments with in situ temperatures of 2.6 and {minus}1.7C were determined. Most-probable-number counts were higher at 10 C than at 20 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.

Authors:
; ;
Publication Date:
Research Org.:
Max Planck Inst. for Marine Microbiology, Bremen (DE)
OSTI Identifier:
20000245
Alternate Identifier(s):
OSTI ID: 20000245
Resource Type:
Journal Article
Journal Name:
Applied and Environmental Microbiology
Additional Journal Information:
Journal Volume: 65; Journal Issue: 9; Other Information: PBD: Sep 1999; Journal ID: ISSN 0099-2240
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; ARCTIC REGIONS; SEDIMENTS; SULFATE-REDUCING BACTERIA; SULFATES; BIODEGRADATION; BIOLOGICAL ADAPTATION

Citation Formats

Knoblauch, C., Joergensen, B.B., and Harder, J. Community size and metabolic rates of psychrophilic sulfate-reducing bacteria in Arctic marine sediments. United States: N. p., 1999. Web.
Knoblauch, C., Joergensen, B.B., & Harder, J. Community size and metabolic rates of psychrophilic sulfate-reducing bacteria in Arctic marine sediments. United States.
Knoblauch, C., Joergensen, B.B., and Harder, J. Wed . "Community size and metabolic rates of psychrophilic sulfate-reducing bacteria in Arctic marine sediments". United States.
@article{osti_20000245,
title = {Community size and metabolic rates of psychrophilic sulfate-reducing bacteria in Arctic marine sediments},
author = {Knoblauch, C. and Joergensen, B.B. and Harder, J.},
abstractNote = {The numbers of sulfate reducers in two Arctic sediments with in situ temperatures of 2.6 and {minus}1.7C were determined. Most-probable-number counts were higher at 10 C than at 20 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.},
doi = {},
journal = {Applied and Environmental Microbiology},
issn = {0099-2240},
number = 9,
volume = 65,
place = {United States},
year = {1999},
month = {9}
}