articleProceedings of the National Academy of SciencesMar 30, 2004GREEN OA

Temperature dependence of metabolic rates for microbial growth, maintenance, and survival

PBP. B. PriceTSTodd Sowers

Pennsylvania State University · University of California, Berkeley

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Abstract

Our work was motivated by discoveries of prokaryotic communities that survive with little nutrient in ice and permafrost, with implications for past or present microbial life in Martian permafrost and Europan ice. We compared the temperature dependence of metabolic rates of microbial communities in permafrost, ice, snow, clouds, oceans, lakes, marine and freshwater sediments, and subsurface aquifer sediments. Metabolic rates per cell fall into three groupings: ( i ) a rate, μ g ( T ), for growth, measured in the laboratory at in situ temperatures with minimal disturbance of the medium; ( ii ) a rate, μ m ( T ), sufficient for maintenance of functions but for a nutrient level too low for growth; and ( iii ) a…

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Topics & keywords

Topics
Keywords
  • Permafrost
  • Sediment
  • Snow
  • Environmental science
  • Glacial period
  • Psychrophile
  • Ecology
  • Geology
UN Sustainable Development Goals
  • Life below water
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