Growing season ecosystem respirations and associated component fluxes in two alpine meadows on the Tibetan Plateau

	Growing season ecosystem respirations and associated component fluxes in two alpine meadows on the Tibetan Plateau
	Hu, Qi-Wu 1,2,3; Wu, Qin 1,2,3; Cao, Guang-Min 1,2; Li, Dong 1,2; Long, Rui-Jun ; Wang, Yue-Si 4
刊名	journal of integrative plant biology
	2008-03-01
卷号	50 期号:3 页码:271-279
关键词	alpine meadow autotrophic respiration ecosystem respiration heterotrophic respiration Q10
合作状况	其它
中文摘要	from 30 june to 24 september in 2003 ecosystem respiration (re) in two alpine meadows on the tibetan plateau were measured using static chamber- and gas chromatography- (gc) based techniques. simultaneously, plant removal treatments were set to partition re into plant autotrophic respiration (ra) and microbial heterotrophic respiration (rh). results indicated that re had clear diurnal and seasonal variation patterns in both of the meadows. the seasonal variability of re at both meadow sites was caused mainly by changes in ra, rather than rh. moreover, at the kobresia humilis meadow site (k_site), ra and rh accounted for 54% and 46% of re, respectively. while at the potentilla fruticosa scrub meadow (p_site), the counterparts accounted for 61% and 39%, respectively. t test showed that there was significant difference in re rates between the two meadows (t = 2.387, p = 0.022). however, no significant difference was found in rh rates, whereas a significant difference was observed in ra rates between the two meadows. thus, the difference in re rate between the two meadows was mainly attributed to plant autotrophic respirations. during the growing season, the two meadows showed relatively low q(10) values, suggesting that re, especially rh was not sensitive to temperature variation in the growing season. additionally, re and rh at the k_site, as well as rh at the p_site was negatively correlated with soil moisture, indicating that soil moisture would also play an important role in respirations.
英文摘要	from 30 june to 24 september in 2003 ecosystem respiration (re) in two alpine meadows on the tibetan plateau were measured using static chamber- and gas chromatography- (gc) based techniques. simultaneously, plant removal treatments were set to partition re into plant autotrophic respiration (ra) and microbial heterotrophic respiration (rh). results indicated that re had clear diurnal and seasonal variation patterns in both of the meadows. the seasonal variability of re at both meadow sites was caused mainly by changes in ra, rather than rh. moreover, at the kobresia humilis meadow site (k_site), ra and rh accounted for 54% and 46% of re, respectively. while at the potentilla fruticosa scrub meadow (p_site), the counterparts accounted for 61% and 39%, respectively. t test showed that there was significant difference in re rates between the two meadows (t = 2.387, p = 0.022). however, no significant difference was found in rh rates, whereas a significant difference was observed in ra rates between the two meadows. thus, the difference in re rate between the two meadows was mainly attributed to plant autotrophic respirations. during the growing season, the two meadows showed relatively low q(10) values, suggesting that re, especially rh was not sensitive to temperature variation in the growing season. additionally, re and rh at the k_site, as well as rh at the p_site was negatively correlated with soil moisture, indicating that soil moisture would also play an important role in respirations.
学科主题	植物学
WOS标题词	science & technology ; life sciences & biomedicine
类目[WOS]	biochemistry & molecular biology ; plant sciences
研究领域[WOS]	biochemistry & molecular biology ; plant sciences
关键词[WOS]	carbon-dioxide exchange ; eddy covariance measurements ; soil co2 efflux ; temperate grassland ; h2o fluxes ; forest ; vegetation ; chamber ; prairie ; atmosphere
收录类别	SCI
语种	英语
WOS记录号	WOS:000253711300003
公开日期	2009-12-07
内容类型	期刊论文
源URL	[http://ir.nwipb.ac.cn/handle/363003/1230]
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.Lanzhou Univ, Coll Pastoral Agr Sci & Technol, Lanzhou 730020, Peoples R China 2.Chinese Acad Sci, NW Inst Plateau Biol, Xining 810001, Peoples R China 3.Jiangxi Normal Univ, Sch Geog & Environm, Nanchang 330022, Peoples R China 4.Chinese Acad Sci, Inst Atmospher Phys, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Hu, Qi-Wu,Wu, Qin,Cao, Guang-Min,et al. Growing season ecosystem respirations and associated component fluxes in two alpine meadows on the Tibetan Plateau[J]. journal of integrative plant biology,2008,50(3):271-279.
APA	Hu, Qi-Wu,Wu, Qin,Cao, Guang-Min,Li, Dong,Long, Rui-Jun,&Wang, Yue-Si.(2008).Growing season ecosystem respirations and associated component fluxes in two alpine meadows on the Tibetan Plateau.journal of integrative plant biology,50(3),271-279.
MLA	Hu, Qi-Wu,et al."Growing season ecosystem respirations and associated component fluxes in two alpine meadows on the Tibetan Plateau".journal of integrative plant biology 50.3(2008):271-279.