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TZID:Europe/Berlin
TZUNTIL:20121028T010000Z
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DTSTART:20091025T030000
TZOFFSETFROM:+0200
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RDATE:20101031T030000
RDATE:20111030T030000
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UID:www.bayceer.uni-bayreuth.de-bayceer-t84283id
DTSTAMP:20260804T144411Z
DESCRIPTION:Eingeladen durch Dr. Jürgen Kreyling Biogeographie. Climate war
 ming is expected to alter soil freezing dynamics in northern temperate reg
 ions as a result of reduced snow cover. Is it hypothesized that these chan
 ges in the frequency and intensity of soil freeze thaw cycles can influenc
 e soil nutrient cycling and plant growth. I examined over 30 years of clim
 ate data from 31 sites in Canada to explore how average winter temperature
 s have correlated with the frequency and intensity of soil freeze thaw cyc
 les\, and used these data to predict future changes in soil freezing. I al
 so used a range of laboratory experiments and a long-term field experiment
  to explore interactions between soil freezing\, soil nitrogen dynamics an
 d plant growth. Overall\, my results reveal a potential for increased free
 ze thaw cycles across Canada with climate warming. However\, biotic respon
 ses to soil freezing appear to be non-linear\, with freeze damage only occ
 urring in response to extreme freezing events. I will also compare my resu
 lts to a recent analysis of freeze thaw cycles in Germany\, where changes 
 in soil freezing dynamics in response to climate change are projected to d
 iffer substantially from colder regions such as Canada. 
DTSTART;TZID=Europe/Berlin:20101021T161500
DTEND;TZID=Europe/Berlin:20101021T174500
LOCATION:H6
SUMMARY:Prof. Hugh A. L. Henry\, University of Western Ontario\, Canada: Cl
 imate warming and atmospheric nitrogen deposition in temperate systems: do
  winter processes matter?
TRANSP:TRANSPARENT
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