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	Ecosystem response more than climate variability drives the inter-annual variability of carbon fluxes in three Chinese grasslands
	Zhang T.; Zhang, Y. J.; Xu, M. J.; Xi, Y.; Zhu, J. T.; Zhang, X. Z.; Wang, Y. F.; Li, Y. N. A.; Shi, P. L.; Yu, G. R.
	2016
关键词	Ecosystem response Carbon flux Inter-annual variability Driving force Grassland leymus-chinensis steppe co2 exchange terrestrial ecosystems soil respiration dioxide exchange inner-mongolia temperate grassland seasonal-variation functional-changes atmospheric co2
英文摘要	The inter-annual variability (IAV) of net ecosystem productivity (NEP) may be caused by both climatic factors and ecosystem responses. In this study, we used eddy covariance (EC) measurements over three typical grasslands in China to investigate the dynamics of NEP and its two components - gross primary productivity (GPP) and ecosystem respiration (Re) and their driving forces. We found that climatic factors and ecosystem response simultaneously influence the IAV of ecosystem carbon fluxes, with a dominant effect arising from an ecosystem response. On a daily scale, carbon fluxes were driven primarily by climatic factors, but effects from an ecosystem response strengthened when the period of analysis was extended. On an annual scale, ecosystem responses weakened the effects of climatic variability on ecosystem carbon fluxes for the three grasslands. This negative feedback demonstrated that ecosystem acclimatization to climate variability can constrain the IAV of carbon fluxes induced by such variability. (C) 2016 Elsevier B.V. All rights reserved.
出处	Agricultural and Forest Meteorology
卷	225
页	48-56
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/311030/43911]
专题	生态系统网络观测与模拟院重点实验室_生态网络实验室
推荐引用方式 GB/T 7714	Zhang T.,Zhang, Y. J.,Xu, M. J.,et al. Ecosystem response more than climate variability drives the inter-annual variability of carbon fluxes in three Chinese grasslands. 2016.

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