The potential importance of grazing to the fluxes of carbon dioxide and methane in an alpine wetland on the Qinghai-Tibetan Plateau

Seasonal changes of CO2, CH4 and N2O fluxes in different types of alpine grassland in the Qinghai-Tibetan Plateau of China

“…The significant promotion of soil CO 2 emission of degraded grasslands in the present study also confirms findings in previous studies that grassland degradation may lead to an increase of greenhouse gas emissions (Hirota et al, 2005;Wang et al, 2010). As the grasslands became degraded, the pH and BD of the topsoil (0e5 cm) increased and soil nutrients decreased (Li et al, 2013, resulting in barren soil with fewer nutrients.…”

Predominance of Precipitation and Temperature Controls on Ecosystem CO2 Exchange in Zoige Alpine Wetlands of Southwest China

“…We hypothesized that gross primary production (GPP) would be more variable than ecosystem respiration (R eco ) on a daily and seasonal basis because soil moisture was plentiful and soil temperatures were not highly variable. Our study also synthesized carbon exchange of alpine wetlands across the Qinghai-Tibetan Plateau by integrating studies from other sites on the plateau (Hirota et al 2005(Hirota et al , 2006Zhang et al 2008;Zhao et al 2010).…”

Grazing intensity and soil depth effects on soil properties in alpine meadow pastures of Qilian Mountain in northwest China

“…Total nitrogen (TN) was measured by the Kjeldahl method (Hirota et al 2005), available nitrogen (AN) was extracted using the micro-diffusion method (Hirota et al 2005). Soil total phosphorus (TP) was determined using a flame photometer (Dick & Tabatabai 1977;Borie et al 1989), while available phosphorus (AP) was extracted using the Olsen method (Olsen & Dean 1965).…”