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This study considers the spatial variability of soil organic carbon, nitrogen, and phosphorus storage in a drained alpine wetland and the possible relationships with soil properties. Top 0-0.30 m soil samples were collected in a typical alpine wetland in the south-eastern Qinghai-Tibet plateau using grid sampling. There was high spatial variability for soil organic carbon density (SOCD), soil total nitrogen density (STND), and soil total phosphorous density (STPD) in the drained alpine wetland. Spherical models best described the structure of the semivariograms for SOCD and STPD, and an exponential model for STND, with the range parameter of Additional keywords: drainage, peat soils, Qinghai-Tibet plateau, soil organic carbon, spatial variability, total nitrogen, total phosphorous., Introduction Wetland is an important component of the terrestrial ecosystem, and plays a crucial role in modifying regional climate, protecting biodiversity, and sequestrating carbon (C), nitrogen (N), and phosphorous (P) [...]

Abstract: 210Pb and 137Cs dating techniques are used to characterize recent peat accumulation rates of alpine peatlands located in Zoige, Tibetan plateau. Several cores were collected in different parts of the peatlands. Cores were 210Pb- and 137Cs-dated, and these data were used to calculate sediment accumulation rates. Ranges of dry mass accumulation rates were 0.021∼0.048g cm-2 yr−1 (the mean value is 0.033g cm-2 yr−1). The mean sediment fluxes of SOC, LC and TN in the marsh soil were 113g m-2 yr−1, 12g m-2 yr−1 and 5g m-2 yr−1 seperatly during 1952∼2004 using 137Cs and 210Pb techenique. The changes of SOC, TN and LC accumulation flux were similar with that of the temperature of May. [ABSTRACT FROM AUTHOR]