Heating up the roof of the world: tracing the impacts of in-situ warming on carbon cycle in alpine grasslands on the Tibetan Plateau  

作　　者：Yuxuan Bai Yunfeng Peng Dianye Zhang Guibiao Yang Leiyi Chen Luyao Kang Wei Zhou Bin Wei Yuhong Xie Yuanhe Yang 

机构地区：[1]State Key Laboratory of Vegetation and Environmental Change,Institute of Botany,Chinese Academy of Sciences,Beijing 100093,China [2]China National Botanical Garden,Beijing 100093,China [3]College of Resources and Environment,University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《National Science Review》2025年第2期323-341,共19页国家科学评论(英文版)

基　　金：supported by the National Natural Science Foundation of China(31988102,32201405,32241034 and 32425004);the National Key Research and Development Program of China(2022YFF0801901 and 2022YFF0801902);the New Cornerstone Science Foundation through the XPLORER PRIZE.

摘　　要：Climate warming may induce substantial changes in the ecosystem carbon cycle,particularly for those climate-sensitive regions,such as alpine grasslands on the Tibetan Plateau.By synthesizing findings from in-situ warming experiments,this review elucidates the mechanisms underlying the impacts of experimental warming on carbon cycle dynamics within these ecosystems.Generally,alterations in vegetation structure and prolonged growing season favor strategies for enhanced ecosystem carbon sequestration under warming conditions.Whilst warming modifies soil microbial communities and their carbon-related functions,its effects on soil carbon release fall behind the increased vegetation carbon uptake.Despite the fact that no significant accumulation of soil carbon stock has been detected upon warming,notable changes in its fractions indicate potential shifts in carbon stability.Future studies should prioritize deep soil carbon dynamics,the interactions of carbon,nitrogen,and phosphorus cycles under warming scenarios,and the underlying biological mechanisms behind these responses.Furthermore,the integration of long-term warming experiments with Earth system models is essential for reducing the uncertainties of model predictions regarding future carbon-climate feedback in these climate-sensitive ecosystems.

关 键 词：carbon cycle climate warming grassland ecosystem soil carbon dynamics vegetation growth warming experiment 

分 类 号：P46[天文地球—大气科学及气象学]