Aboveground biomass of the alpine shrub ecosystems in Three-River Source Region of the Tib

Aboveground biomass of the alpine shrub ecosystems in Three-River Source Region of the

Tibetan Plateau

NIE Xiu-qing;YANG Lu-eun;XIONG Feng;LI Chang-bin;LI FAN;ZHOU Guo-ying

【期刊名称】《山地科学学报（英文版）》 【年(卷),期】2018(015)002

【摘要】Though aboveground biomass (AGB) has an important contribution to the global carbon cycle,the information about storage and climatic effects of AGB is scare in Three-River Source Region (TRSR) shrub ecosystems.This study investigated AGB storage and its climatic controls in the TRSR alpine shrub ecosystems using data collected from 23 sites on the Tibetan Plateau from 2011 to 2013.We estimated the AGB storage (both shrub layer biomass and grass layer biomass) in the alpine shrubs as 37.49 Tg,with an average density of 1447.31 g m-2.Biomass was primarily accumulated in the shrub layer,which accounted for 92％ of AGB,while the grass layer accounted for only 8％.AGB significantly increased with the mean annual temperature (P ＜ 0.05).The effects of the mean annual precipitation on AGB were not significant.These

results

suggest

that

temperature,rather

than

precipitation,has significantly effects on of aboveground vegetation growth in the TRSR alpine shrub ecosystems.The actual and potential increase in AGB density was different due to global warming varies