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	Seasonal patterns and environmental control of ecosystem respiration in subtropical and temperate forests in China
	Yu G. R. ; Wen X. F. ; Li Q. K. ; Zhang L. M. ; Ren C. Y. ; Liu Y. F. ; Guan D. X.
	2005
关键词	ChinaFLUX eddy covariance Q(10) drought effects temperature effects carbon-dioxide exchange water-vapor exchange boreal aspen forest soil respiration flux measurements deciduous forest long-term european forests co2 efflux vegetation
英文摘要	Continuous measurement of carbon dioxide exchange using the eddy covariance (EC) technique was made at two ChinaFLUX forest sites including the young subtropical Pinus plantation (Qianyanzhou) and old temperate broad-leaved Korean pine mixed forest (Changbai Mountains) as part of the ChinaFLUX network. Seasonal patterns and environmental control of ecosystem respiration in the subtropical and temperate forests were evaluated by the often-used multiplicative model and Q(10) model as a function of temperature and soil water content. The results suggested that (i) temperature was found to be a dominant factor in the ecosystem respiration, and most of the temporal variability of ecosystem respiration was explained by temperature. However, in the drought-stressed ecosystem, soil water content controlled the temporal variability of ecosystem respiration other than temperature effects, and soil water content became a dominat factor when severe drought affected the ecosystem respiration; (ii) the regression models analysis revealed that in the drier soil, ecosystem respiration was more sensitive to soil moisture than was expressed by the often-used multiplicative model. It was possible to accurately estimate the seasonal variation of ecosystem respiration based on the 010 model; and (iii) annual ecosystem respiration derived from the often-used multiplicative model was 1209 g C m(-2) and 1303 g C m(-2), and was consistently a little higher than the Q(10) model estimates of 1197 g C m(-2) and 1268 g C m(-2) for Qianyanzhou and Changbai Mountains, respectively.
出处	Science in China Series D-Earth Sciences
卷	48
页	93-105
收录类别	SCI
语种	英语
ISSN号	1006-9313
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/22517]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Yu G. R.,Wen X. F.,Li Q. K.,et al. Seasonal patterns and environmental control of ecosystem respiration in subtropical and temperate forests in China. 2005.

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