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TZID:Europe/Berlin
TZUNTIL:20121028T010000Z
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DTSTART:20101031T030000
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RDATE:20111030T030000
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UID:www.bayceer.uni-bayreuth.de-bayceer-t86686id
DTSTAMP:20260813T045851Z
DESCRIPTION:Eingeladen durch Marcus A. Horn\, Ecological Microbiology. Meth
 ane emission from peatlands contributes substantially to global warming bu
 t is significantly reduced by sulfate reduction\, which is mainly fuelled 
 by globally increasing aerial sulfur pollution and apparently by an anoxic
  sulfur cycle in peatlands. However\, the biology behind sulfate reduction
  in peatlands is not well understood. Comparative stable isotope probing i
 n the presence and absence of sulfate revealed that a Desulfosporosinus sp
 ecies\, which constitutes only 0.006% of the total microbial community\, i
 s a major sulfate reducer in the long-term experimental field site Schlöpp
 nerbrunnen II. The small Desulfosporosinus population has the potential to
  reduce sulfate in situ at a rate of up to 36.8 nmol (g soil w. wt.)–1 day
 –1\, sufficient to account for a substantial part of sulfate reduction in 
 the peat soil. These results indicate that rare biosphere members can cont
 ribute significantly to biogeochemical cycles despite their low abundance.
  Additional sulfate reducers in the studied peatland might be represented 
 by novel deep-branching lineages of the functional marker genes dsrAB [enc
 oding subunit A and B of the dissimilatory (bi)sulfite reductase]\, which 
 were shown to be widespread in peatlands of Central Europe. Microarray and
  qPCR analyses of the Schlöppnerbrunnen II peatland revealed that these no
 vel dsrAB lineages dominated a temporally stable but spatially structured 
 dsrAB community and represented ‘core’ members (up to 1–2% relative abunda
 nce) of the autochthonous microbial community. Our results provide first i
 nsights into the ecology of sulfate reducing microorganisms in low-sulfate
  peatlands – a habitat that is considered a major unknown concerning its c
 arbon storage/release-function in the upcoming climate change. 
DTSTART;TZID=Europe/Berlin:20101125T154500
DTEND;TZID=Europe/Berlin:20101125T170000
LOCATION:H6
SUMMARY:Dr. Michael Pester\, Faculty of Life Sciences\, Dept. of Microbial 
 Ecology (DOME)\, University of Vienna: Sulfate-reducing microorganisms in 
 low-sulfate peatlands: overlooked key players in the interwined biogeochem
 ical cycles of peat soils?
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