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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.; Sun, X. M.
Source PublicationAgricultural and Forest Meteorology
2016
Volume225
Pages48-56
KeywordEcosystem 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
AbstractThe 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.
Indexed BySCI
Language英语
ISSN0168-1923
DOI10.1016/j.agrformet.2016.05.004
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document TypeSCI/SSCI论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/43396
Collection历年回溯文献
Recommended Citation
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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