Alpine grassland soils contain large proportion of labile carbon but indicate long turnover times
نویسندگان
چکیده
منابع مشابه
Role of large-scale soil structure in organic carbon turnover: Evidence from California grassland soils
[1] We characterized the effect of large-scale (>20 mm) soil physical structure on the age and recalcitrance of soil organic carbon (SOC) in upper (A) and lower (B) horizons of grassland soils from California’s Central Valley. The radiocarbon content of SOC from surfaces and interiors of large-scale soil structural units (‘‘peds’’) was measured in order to characterize the spatial distribution ...
متن کاملEcosystem Carbon Storage in Alpine Grassland on the Qinghai Plateau
The alpine grassland ecosystem can sequester a large quantity of carbon, yet its significance remains controversial owing to large uncertainties in the relative contributions of climate factors and grazing intensity. In this study we surveyed 115 sites to measure ecosystem carbon storage (both biomass and soil) in alpine grassland over the Qinghai Plateau during the peak growing season in 2011 ...
متن کاملWeathering Controls on Mechanisms of Carbon Storage in Grassland Soils
On a sequence of soils developed under similar vegetation, temperature and precipitation conditions, but with variations in mineralogical properties, we use organic carbon and C inventories to examine mineral protection of soil organic carbon. In these soils, C data indicates that the creation of slow-cycling carbon can be modeled as occurring through reaction of organic ligands with Al and Fe ...
متن کاملMethodological uncertainty in estimating carbon turnover times of soil fractions
Improving predictions of soil organic carbon (SOC) dynamics by multi-compartment models requires validation of turnover times of different SOC pools. Techniques such as laboratory incubation and isotope analysis have been adopted to estimate C turnover times, yet no studies have systematically compared these techniques and assessed the uncertainties associated with them. Here, we tested whether...
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ژورنال
عنوان ژورنال: Biogeosciences
سال: 2011
ISSN: 1726-4189
DOI: 10.5194/bg-8-1911-2011