01428nas a2200217 4500008004100000245009400041210006900135300001300204490000700217520072800224653001400952653002600966653002400992653002801016653001201044100001701056700001401073700002101087700001501108856008701123 2009 eng d00aLandscape-level variation in temperature sensitivity of soil organic carbon decomposition0 aLandscapelevel variation in temperature sensitivity of soil orga a373 -3750 v423 a
We examined landscape-level variation in temperature sensitivity of labile SOC across 71 sites at a central North American grassland. The observed range in activation energy of decomposition (Ea), an index of temperature sensitivity, was as great at the landscape scale as has been observed at the continental scale. Ea was lower for soils with more labile C, consistent with the ‘Carbon quality-temperature’ hypothesis. Soil pH explained 67% of the variation in Ea. Although there are strong environmental correlates with the Ea of SOC decomposition at landscape scales, the amount of variation within landscapes could confound regional- to global-scale predictions of the response of soil C to warming.
10agrassland10aMicrobial respiration10aSoil organic carbon10aTemperature sensitivity10aWarming1 aCraine, J.M.1 aSpurr, R.1 aMcLauchlan, K.K.1 aFierer, N. uhttps://www.sciencedirect.com/science/article/abs/pii/S0038071709004015?via%3Dihub