Adaptation of bacteria in marine sediments to Arctic temperatures

Updated 2003-03-03

The goal is to understand, how bacteria in Arctic sediments are adapted to low temperature and how (climatic) changes of temperature may affect the rate and pathways of carbon cycling and the balance of mineral cycles. The diversity and physiology of bacterial populations of fjord sediments on West-Spitzbergen will be studied by a combination of molecular (16S rRNA sequence analyses and in situ hybridization) and microbiological (isolation and physiology of pure cultures) approaches. The metabolic activity of these bacteria in the sea floor and the temperature regulation of the dominant mineralization processes will be analysed by experimentel techniques during the research period in Ny Ålesund. The focus will be on the enzymatic cleavage of polymeric carbohydrates, the anaerobic respiration through sulfate reduction, the reduction of iron and mangenese oxides, and the turnover of volatile fatty acids and hydrogen. Subsequently, psychrophilic bacteria are isolated from the anoxic sediments and studied in pure culture. The bacterial populations in the sediment are studied by molecular methods to analyze their diversity and metabolic activity.

Time frame

Status
Ongoing
Project time span
2001 - 2003
Data collection
not specified
Data processing
not specified
Data reporting
not specified

Contact information

Contact person
Prof. Bo Baker Jørgensen
Address
Max-Planck Institute of Marine Biology Celsiusstr. 1 D-28359 Bremen
Phone
+49-421-2028-602/-600
Fax
+49-421-2028-690
Email
ed.nemerb-ipm@negreojb

Parameters and Media

Not specified

Geography

Regions studied
Koldewey Station, Ny-Ålesund/Spitsbergen
Svalbard
Other areas
Kongsfjord/West Spitsbergen

Data availability

Samples/specimens archived in specimen banks?
No

Methods & Procedures

Not specified

Additional Information

Is this a bi- AND multi-lateral project (i.e. a project involving cooperation between different countries)?
No
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