Differential responses of ecosystem respiration components to experimental warming in a meadow grassland on the Tibetan Plateau

CORC > 地理科学与资源研究所 > 中国科学院地理科学与资源研究所 > 自然资源与环境安全研究部 > 环境修复与资源工程研究室 > SCI/SSCI期刊论文

	Differential responses of ecosystem respiration components to experimental warming in a meadow grassland on the Tibetan Plateau
	Chen J.; Luo, Y. Q.; Xia, J. Y.; Shi, Z.; Jiang, L. F.; Niu, S. L.; Zhou, X. H.; Cao, J. J.; Zhang L.; Li, P.
	2016
关键词	Ecosystem respiration Soil respiration Total autotrophic respiration Heterotrophic respiration Experimental warming Tibetan Plateau carbon-cycle feedback open-top chambers soil co2 efflux autotrophic respiration thermal-acclimation climate-change alpine meadow heterotrophic respiration temperature sensitivity microbial respiration
英文摘要	Global warming is anticipated to have profound effects on terrestrial carbon fluxes and thus feed backs to future climate change. Ecosystem respiration (R-eco) is one of the dominant components of biosphere CO2 fluxes, but the effects of warming on Reco are still unclear. A field warming experiment using open top chambers (OTCs) was conducted in a meadow grassland on the Tibetan Plateau to study the effects of warming on the components of Reco. Warming significantly enhanced above-ground plant respiration (R-agb) and total autotrophic plant respiration (R-plant 1 by 28.7% and 19.9%, respectively, but reduced heterotrophic respiration (R-h) by 10.4%. These different responses resulted in the insensitive responses of Reco and soil respiration (R-s) to the experimental warming. The warming treatment also increased R-plant/R-eco and R-agb/R-eco. by 8.4% and 17.3%, respectively, while decreasing R-h/R-eco, by 19.0%, suggesting that warming could eventually cause R-eco to be dominated by R-plant. Enhancements in Roam and R-agb were related to the warming-induced increases in aboveground biomass (AGB) while reduced R-h was closely coupled with warming-induced decrease of microbial biomass carbon. Our results highlight that the differential responses of the components of R-eco to different environmental physics under warming scenarios should be taken into consideration to project the future carbon-climate feed backs. (C) 2016 Elsevier B.V. All rights reserved.
出处	Agricultural and Forest Meteorology
卷	220
页	21-29
收录类别	SCI
语种	英语
ISSN号	0168-1923
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/43399]
专题	资源利用与环境修复重点实验室_资源地理与国土资源研究室_SCI/SSCI期刊论文地理科学与资源研究所_生态系统研究网络观测与模拟重点实验室地理科学与资源研究所_区域可持续发展分析与模拟重点实验室_区域可持续发展模拟实验室中国科学院地理科学与资源研究所
推荐引用方式 GB/T 7714	Chen J.,Luo, Y. Q.,Xia, J. Y.,et al. Differential responses of ecosystem respiration components to experimental warming in a meadow grassland on the Tibetan Plateau. 2016.