Distribution and Estimation of Aboveground Biomass of Alpine Shrubs along an Altitudinal Gradient in a Small Watershed of the Qilian Mountains, China

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > Journal of Mountain Science > Journal of Mountain Science-2015 > Vol12 No.4

	Distribution and Estimation of Aboveground Biomass of Alpine Shrubs along an Altitudinal Gradient in a Small Watershed of the Qilian Mountains, China
	LIU Zhang-wen ; CHEN Ren-sheng ; SONG Yao-xuan ; HAN Chun-tan
刊名	Journal of Mountain Science
	2015-07
卷号	12 期号:4 页码:961-971
关键词	Aboveground biomass Allometric equations Alpine shrub Altitudinal gradient Qilian Mountains
ISSN号	1672-6316
通讯作者	CHEN Ren-sheng
英文摘要	Shrublands serve as an important component of terrestrial ecosystems, and play an important role in structure and functions of alpine ecosystem. Accurate estimation of biomass is critical to examination of the productivity of alpine ecosystems, due to shrubificationunder climate change in past decades. In this study, 14 experimental plots and 42 quadrates of the shrubs Potentilla fruticosaand Caragana jubatawere selected along altitudes gradients from 3220 to 3650 m a.s.l. (above sea level) on semi-sunny and semi-shady slopein Hulu watershed of Qilian Mountains, China. The foliage, woody componentand total abovegroundbiomassper quadratewere examined using a selective destructivemethod, then the biomass were estimated via allometric equations based on measured parameters for two shrub species. The results showed that C. jubataaccounted for1–3 times more biomass (480.98g/m2) than P. fruticosa (191.21 g/m2). The aboveground biomass of both the shrubs varied significantly with altitudinal gradient (P<0.05). Woody component accounted for the larger proportion than foliage component in the total aboveground biomass.The biomass on semi-sunny slopes (200.27 g/m2and 509.07 g/m2) was greater than on semi-shady slopes (182.14 g/m2and 452. 89 g/m2) at the same altitude band for P. fruticosa and C. jubata. In contrast, the foliage biomass on semi-shady slopes (30.50g/m2) was greater than on semi-sunny slopes (27.51 g/m2)for two shrubs. Biomass deceased with increasing altitude for P. fruticosa,whereas C. jubata showed a hump-shaped pattern with altitude. Allometric equations were obtained from the easily descriptive parameters of height (H), basal diameter (D) and crown area (C) for biomass of C. jubataand P. fruticosa. Although the equations type and variables comprising of the best model varied among the species, all equations related to biomass were significant (P < 0.005), with determination coefficients (R2) ranging from 0.81 to 0.96. The allometric equations satisfied the requirements of the model, and can be used to estimate the regional scale biomass of P. fruticosaand C. jubata in alpine ecosystems of the Qilian Mountains.
收录类别	SCI
语种	英语
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/10641]
专题	成都山地灾害与环境研究所_Journal of Mountain Science _Journal of Mountain Science-2015_Vol12 No.4
推荐引用方式 GB/T 7714	LIU Zhang-wen,CHEN Ren-sheng,SONG Yao-xuan,et al. Distribution and Estimation of Aboveground Biomass of Alpine Shrubs along an Altitudinal Gradient in a Small Watershed of the Qilian Mountains, China[J]. Journal of Mountain Science,2015,12(4):961-971.
APA	LIU Zhang-wen,CHEN Ren-sheng,SONG Yao-xuan,&HAN Chun-tan.(2015).Distribution and Estimation of Aboveground Biomass of Alpine Shrubs along an Altitudinal Gradient in a Small Watershed of the Qilian Mountains, China.Journal of Mountain Science,12(4),961-971.
MLA	LIU Zhang-wen,et al."Distribution and Estimation of Aboveground Biomass of Alpine Shrubs along an Altitudinal Gradient in a Small Watershed of the Qilian Mountains, China".Journal of Mountain Science 12.4(2015):961-971.