Seasonal patterns of gross primary production and ecosystem respiration in an alpine meadow ecosystem on the Qinghai-Tibetan Plateau

	Seasonal patterns of gross primary production and ecosystem respiration in an alpine meadow ecosystem on the Qinghai-Tibetan Plateau
	Kato, T ; Tang, YH ; Gu, S ; Hirota, M ; Cui, XY ; Du, MY ; Li, YN ; Zhao, XQ ; Oikawa, T
刊名	journal of geophysical research-atmospheres
	2004-06-30
卷号	109 期号:d12
关键词	carbon budget eddy covariance method gap filling net ecosystem production
合作状况	其它
中文摘要	we measured the net ecosystem co2 exchange (nee) in an alpine meadow ecosystem (latitude 37degrees29'-45'n, longitude 101degrees12'-23'e, 3250 m above sea level) on the qinghai-tibetan plateau throughout 2002 by the eddy covariance method to examine the carbon dynamics and budget on this unique plateau. diurnal changes in gross primary production (gpp) and ecosystem respiration (r-e) showed that an afternoon increase of nee was highly associated with an increase of r-e. seasonal changes in gpp corresponded well to changes in the leaf area index and daily photosynthetic photon flux density. the ratio of gpp/r-e was high and reached about 2.0 during the peak growing season, which indicates that mainly autotrophic respiration controlled the carbon dynamics of the ecosystem. seasonal changes in mean gpp and r-e showed compensatory behavior as reported for temperate and mediterranean ecosystems, but those of gpp(max) and r-emax were poorly synchronized. the alpine ecosystem exhibited lower gpp (575 g c m(-2) y(-1)) than, but net ecosystem production (78.5 g c m(-2) y(-1)) similar to, that of subalpine forest ecosystems. the results suggest that the alpine meadow behaved as a co2 sink during the 1-year measurement period but apparently sequestered a rather small amount of c in comparison with similar alpine ecosystems.
英文摘要	we measured the net ecosystem co2 exchange (nee) in an alpine meadow ecosystem (latitude 37degrees29'-45'n, longitude 101degrees12'-23'e, 3250 m above sea level) on the qinghai-tibetan plateau throughout 2002 by the eddy covariance method to examine the carbon dynamics and budget on this unique plateau. diurnal changes in gross primary production (gpp) and ecosystem respiration (r-e) showed that an afternoon increase of nee was highly associated with an increase of r-e. seasonal changes in gpp corresponded well to changes in the leaf area index and daily photosynthetic photon flux density. the ratio of gpp/r-e was high and reached about 2.0 during the peak growing season, which indicates that mainly autotrophic respiration controlled the carbon dynamics of the ecosystem. seasonal changes in mean gpp and r-e showed compensatory behavior as reported for temperate and mediterranean ecosystems, but those of gpp(max) and r-emax were poorly synchronized. the alpine ecosystem exhibited lower gpp (575 g c m(-2) y(-1)) than, but net ecosystem production (78.5 g c m(-2) y(-1)) similar to, that of subalpine forest ecosystems. the results suggest that the alpine meadow behaved as a co2 sink during the 1-year measurement period but apparently sequestered a rather small amount of c in comparison with similar alpine ecosystems.
学科主题	生物科学
WOS标题词	science & technology ; physical sciences
类目[WOS]	meteorology & atmospheric sciences
研究领域[WOS]	meteorology & atmospheric sciences
关键词[WOS]	soil respiration ; deciduous forest ; carbon balance ; net carbon ; exchange ; co2 ; sequestration ; temperature ; increases ; storage
收录类别	SCI
语种	英语
WOS记录号	WOS:000222780100001
公开日期	2009-12-09
内容类型	期刊论文
源URL	[http://ir.nwipb.ac.cn/handle/363003/1393]
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
作者单位	1.Univ Tsukuba, Doctoral Program Biol Sci, Tsukuba, Ibaraki 305, Japan 2.Natl Inst Environm Studies, Tsukuba, Ibaraki 3058569, Japan 3.Natl Inst Agroenvironm Sci, Tsukuba, Ibaraki 3058604, Japan 4.Chinese Acad Sci, NW Plateau Inst Biol, Xining 810001, Qinghai, Peoples R China 5.Univ Tsukuba, Inst Biol Sci, Tsukuba, Ibaraki 3058577, Japan
推荐引用方式 GB/T 7714	Kato, T,Tang, YH,Gu, S,et al. Seasonal patterns of gross primary production and ecosystem respiration in an alpine meadow ecosystem on the Qinghai-Tibetan Plateau[J]. journal of geophysical research-atmospheres,2004,109(d12).
APA	Kato, T.,Tang, YH.,Gu, S.,Hirota, M.,Cui, XY.,...&Oikawa, T.(2004).Seasonal patterns of gross primary production and ecosystem respiration in an alpine meadow ecosystem on the Qinghai-Tibetan Plateau.journal of geophysical research-atmospheres,109(d12).
MLA	Kato, T,et al."Seasonal patterns of gross primary production and ecosystem respiration in an alpine meadow ecosystem on the Qinghai-Tibetan Plateau".journal of geophysical research-atmospheres 109.d12(2004).