Seasonal variations and mechanism for environmental control of NEE of CO2 concerning the Potentilla fruticosa in alpine shrub meadow of Qinghai-Tibet Plateau

NWIPB OpenIR

	Seasonal variations and mechanism for environmental control of NEE of CO2 concerning the Potentilla fruticosa in alpine shrub meadow of Qinghai-Tibet Plateau
	Li Yingnian ; Sun Xiaomin ; Zhao Xinquan ; Zhao Liang ; Xu Shixiao ; Gu Song ; Zhang Fawei ; Yu Guirui
	2006-11-01
发表期刊	SCIENCE IN CHINA SERIES D-EARTH SCIENCES
卷号	49 页码:174-185
文章类型	Article
摘要	The study by the eddy covariance technique in the alpine shrub meadow of the Qinghai-Tibet Plateau in 2003 and 2004 showed that the net ecosystem carbon dioxide exchange (NEE) exhibited noticeable diurnal and annual variations, with more distinct daily changes during the warmer seasons. The CO2 emission of the shrub ecosystem culminated in April and September while the CO2 absorption capacity reached a maximum in July and August. The absorbed carbon dioxide during the two consecutive years was 231.4 and 274.8 g CO(2)(.)m(-2) respectively, yielding an average of 253.1 gCO(2)(.)m(-2) per year: that accounts for a large proportion of absorbed CO2 in the region. Obviously, the diurnal carbon flux was negatively related to temperature, radiation and other atmospheric factors. Still, minute discrepancies in kurtosis and duration of carbon emission/absorption were detected between 2003 and 2004. It was found that the CO2 flux in the daytime was similarly affected by photosynthetic photon flux density in both years. Temperature appears to be the most important determinant of CO2 flux: specifically, the high temperature during the plant growing season inhibits the carbon absorption capacity. One potential explanation is that soil respiration is enhanced under such condition. Analysis of biomass revealed that the annual net carbon fixed capacity of aboveground and belowground biomass was 544.0 in 2003 and 559.4 g C(.)m(-2) in 2004, which coincided with the NEE absorption capacity (63.1 g C(.)m(-2) in 2003 and 74.9 g C(.)m(-2) in 2004) in the corresponding plant growing season.
关键词	Potentilla Fruticosa Shrub Meadow Yearly Meteorological Conditions Co2 Exchange Variations Meteorological Factors Aboveground And Belowground Biomass Lai
WOS标题词	Science & Technology ; Physical Sciences
关键词[WOS]	CARBON-DIOXIDE EXCHANGE ; FLUX MEASUREMENTS ; FOREST ; ECOSYSTEMS ; ATMOSPHERE ; NORTHERN ; RATES
收录类别	SCI
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000242721500015
引用统计	被引频次：13[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/6856
专题	中国科学院西北高原生物研究所
作者单位	1.Chinese Acad Sci, NW Inst Plateau Biol, Xining 810001, Peoples R China 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China 3.Grad Univ, Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Li Yingnian,Sun Xiaomin,Zhao Xinquan,et al. Seasonal variations and mechanism for environmental control of NEE of CO2 concerning the Potentilla fruticosa in alpine shrub meadow of Qinghai-Tibet Plateau[J]. SCIENCE IN CHINA SERIES D-EARTH SCIENCES,2006,49:174-185.
APA	Li Yingnian.,Sun Xiaomin.,Zhao Xinquan.,Zhao Liang.,Xu Shixiao.,...&Yu Guirui.(2006).Seasonal variations and mechanism for environmental control of NEE of CO2 concerning the Potentilla fruticosa in alpine shrub meadow of Qinghai-Tibet Plateau.SCIENCE IN CHINA SERIES D-EARTH SCIENCES,49,174-185.
MLA	Li Yingnian,et al."Seasonal variations and mechanism for environmental control of NEE of CO2 concerning the Potentilla fruticosa in alpine shrub meadow of Qinghai-Tibet Plateau".SCIENCE IN CHINA SERIES D-EARTH SCIENCES 49(2006):174-185.