Comparative study of the net exchange of CO2 in 3 types of vegetation ecosystems on the Qinghai-Tibetan Plateau

	Comparative study of the net exchange of CO2 in 3 types of vegetation ecosystems on the Qinghai-Tibetan Plateau
	Zhao, L ; Li, YN ; Zhao, XQ ; Xu, SX ; Tang, YH ; Yu, GR ; Gu, S ; Du, MY ; Wang, QX
刊名	CHINESE SCIENCE BULLETIN
	2005-08-01
英文摘要	Using the eddy covariance method, from 1 July 2003 to 30 June 2004, we conducted the observation and analysis of ecosystem CO2 flux in 3 types of alpine meadow vegetation (Kobresia humilis, Potentilla fruticosa shrub and Kobresia tibetica swamp meadows) on the Qinghai-Tibetan Plateau. The results show that the Kobresia humilis meadow, the shrub meadow and the swamp meadow's highest CO2 uptake rates are 16.78, 10.42 and 16.57 pmol-m(-2)-s(-1) respectively, while their highest CO2 release rates are 8.22, 7.73 and 18.67 mu mol-m(-2)-s(-1) respectively. The Kobresia humilis meadow and shrub meadow's annual atmospheric uptakes are 282 g CO2/m(2) and 53 g CO2/m(2), respectively, while swamp meadow's annual atmospheric release is 478 g CO2/m(2). This proves that the Kobresia humilis meadow and the shrub meadow on the Qinghai-Tibetan Plateau have relatively low potential for CO2 uptake and release compared to C4 grasslands, a number of lowland grasslands, and forests. Moreover, swamp meadow has relatively high release potential. This, in turn, reveals clear differences in carbon source/sink between different types of vegetation in the Qinghai-Tibetan Plateau alpine meadow ecosystem. These differences are mainly brought by differences in the vegetations' photosynthetic capacity and soil respiration.
内容类型	期刊论文
源URL	[http://ir.nwipb.ac.cn/handle/363003/6848]
专题	西北高原生物研究所_中国科学院西北高原生物研究所
推荐引用方式 GB/T 7714	Zhao, L,Li, YN,Zhao, XQ,et al. Comparative study of the net exchange of CO2 in 3 types of vegetation ecosystems on the Qinghai-Tibetan Plateau[J]. CHINESE SCIENCE BULLETIN,2005.
APA	Zhao, L.,Li, YN.,Zhao, XQ.,Xu, SX.,Tang, YH.,...&Wang, QX.(2005).Comparative study of the net exchange of CO2 in 3 types of vegetation ecosystems on the Qinghai-Tibetan Plateau.CHINESE SCIENCE BULLETIN.
MLA	Zhao, L,et al."Comparative study of the net exchange of CO2 in 3 types of vegetation ecosystems on the Qinghai-Tibetan Plateau".CHINESE SCIENCE BULLETIN (2005).