Seasonal variation of carbon exchange of typical forest ecosystems along the eastern forest transect in China

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	Seasonal variation of carbon exchange of typical forest ecosystems along the eastern forest transect in China
	Zhang, LM; Yu, GR; Sun, XM; Wen, XF; Ren, CY; Song, X; Liu, YF; Guan, DX; Yan, JH; Zhang, YP
刊名	SCIENCE IN CHINA SERIES D-EARTH SCIENCES
	2006
卷号	49 页码:47-62
关键词	Forest Transect Carbon Budget Ecosystem Photosynthesis Ecosystem Respiration Chinaflux Eddy Covariance
ISSN号	1006-9313
英文摘要	The long-term and continuous carbon fluxes of Changbaishan temperate mixed forest (CBS), Qianyanzhou subtropical evergreen coniferous forest (QYZ), Dinghushan subtropical evergreen mixed forest (DHS) and Xishuangbana tropical rainforest (XSBN) have been measured with eddy covariance techniques. In 2003, different responses of carbon exchange to the environment appeared across the four ecosystems. At CBS, the carbon exchange was mainly determined by radiation and temperature. 0 degrees C and 10 degrees C were two important temperature thresholds; the former determined the length of the growing season and the latter affected the magnitude of carbon exchange. The maximum net ecosystem exchange (NEE) of CBS occurred in early summer because maximum ecosystem photosynthesis (G(PP)) occurred earlier than maximum ecosystem respiration (Re). During summer, QYZ experienced severe drought and NEE decreased significantly mainly as a result of the depression of GPP. At DHS and XSBN, NEE was higher in the drought season than the wet season, especially the conversion between carbon sink and source occurring during the transition season at XSBN. During the wet season, increased fog and humid weather resulted from the plentiful rainfall, the ecosystem G(PP) was dispressed. The Q(10) and annual respiration of XSBN were the highest among the four ecosystems, while the average daily respiration of CBS during the growing season was the highest. Annual NEE of CBS, QYZ, DHS and XSBN were 181.5, 360.9, 536.2 and -320.0 g(.)C(.)m(-2.)a(-1), respectively. From CBS to DHS, the temperature and precipitation increased with the decrease in latitude. The ratio of N-EE/R-e increased with latitude, while R-e/G(PP), ecosystem light use efficiency (L-UE), precipitation use efficiency and average daily GPP decreased gradually. However, XSBN usually escaped such latitude trend probably because of the influence of the south-west monsoon climate which does not affect the other ecosystems. Long-term measurement and more research were necessary to understand the adaptation of forest ecosystems to climate change and to evaluate the ecosystem carbon balance due to the complexity of structure and function of forest ecosystems.
学科主题	Geosciences, Multidisciplinary
语种	英语
WOS记录号	WOS:000242721500004
公开日期	2011-09-23
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/54795]
专题	沈阳应用生态研究所_沈阳应用生态研究所
通讯作者	Yu, GR, Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, CERN, Synth Ctr, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Zhang, LM,Yu, GR,Sun, XM,et al. Seasonal variation of carbon exchange of typical forest ecosystems along the eastern forest transect in China[J]. SCIENCE IN CHINA SERIES D-EARTH SCIENCES,2006,49:47-62.
APA	Zhang, LM.,Yu, GR.,Sun, XM.,Wen, XF.,Ren, CY.,...&Yu, GR, Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, CERN, Synth Ctr, Beijing 100101, Peoples R China.(2006).Seasonal variation of carbon exchange of typical forest ecosystems along the eastern forest transect in China.SCIENCE IN CHINA SERIES D-EARTH SCIENCES,49,47-62.
MLA	Zhang, LM,et al."Seasonal variation of carbon exchange of typical forest ecosystems along the eastern forest transect in China".SCIENCE IN CHINA SERIES D-EARTH SCIENCES 49(2006):47-62.