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SUMMARY:Influence of large Sulfur Bacteria on the Geochemistry of Coastal 
 Sediments - Heide Schulz-Vogt\, Leibniz Institute for Baltic Sea Research
DTSTART:20150217T160000Z
DTEND:20150217T170000Z
UID:TALK56084@talks.cam.ac.uk
CONTACT:Alexandra Turchyn
DESCRIPTION:Large Sulfur Bacteria of the Family Beggiatoaceae are found wo
 rld wide in or on top of aquatic sediments\, which contain sulphide. In en
 vironments with high sulphide fluxes\, such as coastal sediments especiall
 y in upwelling areas\, hydrothermal vents\, seeps or whale falls\, they ma
 y build up enormous biomasses and giant species with cell diameters of sev
 eral 100 µm are frequently encountered. They live by the oxidation of sul
 phide with oxygen or nitrate. The latter can be accumulated in extremely h
 igh concentrations within a central vacuole. Apart from the obvious influe
 nce of these bacteria on the sulphur and nitrogen cycling in sulphidic sed
 iments\, they have also been found to accumulate phosphorus\, which they r
 elease periodically leading to a rapid formation of apatite. 
LOCATION:Harker 1 seminar room\, Department of Earth Sciences
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