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TZUNTIL:20130331T010000Z
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DTSTART:20101031T030000
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RDATE:20111030T030000
RDATE:20121028T030000
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DTSTAMP:20260812T002827Z
DESCRIPTION: \nGrasslands cover nearly one-fifth of the world’s land surfac
 e and the coverage is expected to increase. This distribution pattern is g
 overned by climatic and edaphic factors. Currently\, grasslands store >10%
  of the world’s carbon (C) stocks\, but the quantity may change as a resul
 t of the ongoing shifts in global climate and land uses. Nevertheless\, ma
 ny potential effects of climate change on grassland C fluxes and bioproduc
 tivity remain poorly understood. Better predictions of their future respon
 ses to environmental changes require that we understand the sensitivity of
  mechanisms that regulate productivity and carbon fluxes in grasslands in 
 their current states. Simulations of ecosystem response to climate change 
 demonstrate the sensitivity of ecosystem production\, C fluxes and nitroge
 n mineralization in grasslands to temperature and soil moisture availabili
 ty. Both temperature and soil moisture (precipitation) display a shifting 
 intensity along the latitudinal gradient\, from the tropics to the sub-arc
 tic regions.The regulation of C exchange and productivity in grasslands mu
 st\, therefore\, adjust to these gradients\, and shifts with resource avai
 lability in the different eco-climatic regions.  The shifts are further mo
 dified by land use and management practices\, since these also modify envi
 ronmental constraints.\nAbiotic controls regulate instantaneous rates of C
 O2 exchange\, since they change rapidly\; and integratively they determine
  the long-term C balance of an ecosystem. How these short-term adjustments
  relate to the long-term modification of biological processes due to clima
 te and resource availability (along a latititudinal gradient) are key to u
 nderstanding how grasslands will store or lose carbon in the future. Measu
 rements are reported here from five different bioclimatic zones\, from the
  tropics to the sub-arctic regions that provide new understanding of how c
 ontrols of CO2 exchange and biomass dynamics shift along these ecoclimatic
  zones.\n 
DTSTART;TZID=Europe/Berlin:20110609T161500
DTEND;TZID=Europe/Berlin:20110609T174500
LOCATION:H6
SUMMARY:Dr. Dennis Otieno\, Department of Plant Ecology\, Universität Bayre
 uth: Controls on carbon flows and seasonal biomass dynamics in grassland e
 cosystems from tropical to sub arctic/alpine regions
TRANSP:TRANSPARENT
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