Effect of snow cover on phosphorus release from leaf litter in the alpine forest in eastern Qinghai-Tibet plateau Effects of Snow Cover on CO2 Flux of Northern Alpine Meadow on Qinghai-Tibetan Plateau Effects of snowpack on early foliar litter humification during winter in a subalpine forest of western Sichuan Effects of forest gap on hemicellulose dynamics during foliar litter decomposition in an subalpine forest Effects of snowpack and litter input on soil microbial count and biomass in the Eastern Tibetan Plateau Simulation of soil respiration in response to temperature under snowpacks in the Changbai Mountain, China