Global patterns of ecosystem carbon flux in forests: A biometric   data-based synthesis

doi:10.1002/2013GB004593

CORC > 北京大学 > 城市与环境学院

	Global patterns of ecosystem carbon flux in forests: A biometric data-based synthesis
	Xu, Bing ; Yang, Yuanhe ; Li, Pin ; Shen, Haihua ; Fang, Jingyun
刊名	global biogeochemical cycles
	2014
关键词	biometric measurements carbon balance carbon cycle eddy covariance forest ecosystem plant production NET PRIMARY PRODUCTION EDDY COVARIANCE TECHNIQUE OLD-GROWTH FORESTS SOIL RESPIRATION INTERANNUAL VARIABILITY ROOT RESPIRATION TROPICAL FOREST WORLDS FORESTS STAND AGE EXCHANGE
DOI	10.1002/2013GB004593
英文摘要	Forest ecosystems function as a significant carbon sink for atmospheric carbon dioxide. However, our understanding of global patterns of forest carbon fluxes remains controversial. Here we examined global patterns and environmental controls of forest carbon balance using biometric measurements derived from 243 sites and synthesized from 81 publications around the world. Our results showed that both production and respiration increased with mean annual temperature and exhibited unimodal patterns along a gradient of precipitation. However, net ecosystem production (NEP) initially increased and subsequently declined along gradients of both temperature and precipitation. Our results also indicated that ecosystem production increased during stand development but eventually leveled off, whereas respiration was significantly higher in mature and old forests than in young forests. The residual variation of carbon flux along climatic and age gradients might be explained by other factors such as atmospheric CO2 elevation and disturbances (e.g., forest fire, storm damage, and selective harvest). Heterotrophic respiration (R-h) was positively associated with net primary production (NPP), but the R-h-NPP relationship differed between natural and planted forests: R-h increased exponentially with NPP in natural forests but tended toward saturation with increased NPP in planted forests. Comparison of biometric measurements with eddy covariance observations revealed that ecosystem carbon balance derived from the latter generated higher overall NEP estimates. These results suggest that the eddy covariance observations may overestimate the strength of carbon sinks, and thus, biometric measurements need to be incorporated into global assessments of the forest carbon balance.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000343752900004&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Environmental Sciences; Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences; SCI(E); 7; ARTICLE; jyfang@urban.pku.edu.cn; 9; 962-973; 28
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/388265]
专题	城市与环境学院
推荐引用方式 GB/T 7714	Xu, Bing,Yang, Yuanhe,Li, Pin,et al. Global patterns of ecosystem carbon flux in forests: A biometric data-based synthesis[J]. global biogeochemical cycles,2014.
APA	Xu, Bing,Yang, Yuanhe,Li, Pin,Shen, Haihua,&Fang, Jingyun.(2014).Global patterns of ecosystem carbon flux in forests: A biometric data-based synthesis.global biogeochemical cycles.
MLA	Xu, Bing,et al."Global patterns of ecosystem carbon flux in forests: A biometric data-based synthesis".global biogeochemical cycles (2014).