The grassland carbon cycle:Mechanisms,responses to global changes,and potential contribution to carbon neutrality
作者机构：State Key Laboratory of Vegetation and Environmental ChangeInstitute of BotanyChinese Academy of SciencesBeijing 100093China University of Chinese Academy of SciencesBeijing 100049China Lancaster Environment CentreLancaster UniversityLancaster LA14YQUnited Kingdom Department of Evolutionary Biology and Environmental StudiesUniversity of ZurichZurich 8057Switzerland Institute of Plant Sciences and Genetics in AgricultureThe Robert H.Smith Faculty of AgricultureFood and EnvironmentThe Hebrew University of JerusalemRehovot 7610001Israel School of Biological SciencesGeorgia Institute of Technology310 Ferst DriveAtlantaGA 30332United States Department of Plant PathologyNorth Carolina State UniversityRaleighNC 27607United States Sino-French Institute for Earth System ScienceCollege of Urban and Environmental SciencePeking UniversityBeijing 100871China National Hulunber Grassland Ecosystem Observation and Research StationInstitute of Agricultural Resources and Regional PlanningChinese Academy of Agricultural SciencesBeijing 100081China
出 版 物：《Fundamental Research》 (自然科学基础研究（英文版）)
年 卷 期：2023年第3卷第2期
页 面：209-218页
核心收录：
基 金：supported by the National Natural Science Foundation of China (32125025 and 31988102) the Strategic Priority Research Program of the Chinese Academy of Sciences (XDA23080301 and XDA26010303) JMG acknowledges the support of the Israel Science Foundation (1796/19)
主 题：Climate changes Land-use change Soil Biotic and abiotic interactions Grassland degradation Grassland restoration Carbon accounting Carbon storage and sequestration mechanisms
摘 要：Grassland is one of the largest terrestrial biomes,providing critical ecosystem services such as food production,biodiversity conservation,and climate change *** climate change and land-use intensification have been causing grassland degradation and desertification *** one of the primary medium for ecosystem energy flow and biogeochemical cycling,grassland carbon(C)cycling is the most fundamental process for maintaining ecosystem *** this review,we first summarize recent advances in our understanding of the mechanisms underpinning spatial and temporal patterns of the grassland C cycle,discuss the importance of grasslands in regulating inter-and intra-annual variations in global C fluxes,and explore the previously unappreciated complexity in abiotic processes controlling the grassland C balance,including soil inorganic C accumulation,photochemical and thermal degradation,and wind *** also discuss how climate and land-use changes could alter the grassland C balance by modifying the water budget,nutrient cycling and additional plant and soil ***,we examine why and how increasing aridity and improper land use may induce significant losses in grassland C ***,we identify several priorities for future grassland C research,including improving understanding of abiotic processes in the grassland C cycle,strengthening monitoring of grassland C dynamics by integrating ground inventory,flux monitoring,and modern remote sensing techniques,and selecting appropriate plant species combinations with suitable traits and strong resistance to climate fluctuations,which would help design sustainable grassland restoration strategies in a changing climate.
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