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	Omni-directional distribution patterns of montane coniferous forest in the Helan Mountains of China
	Pang Y. ; Zhang B. P. ; Zhao F. ; Yao Y. H. ; Zhang S. ; Qi W. W.
	2013
关键词	Arid region Helan Mountains Qinghai spruce (Picea crassifolia) Aspect effect Coniferous forest Normal distribution slope aspect vegetation structure species richness mt. helan biodiversity
英文摘要	Slope aspect has significant effect on the development and distribution of montane forest, especially in arid and semiarid regions. This paper, using SPOT5 images and 1:50,000 DEM, digitally extracts and analyzes the spatial information of montane coniferous forest (mainly Qinghai spruce), and thereby explores how the upper and lower limits and the altitudinal range of coniferous forest vary and how the area of coniferous forest is related with annual insolation with all aspects in the Helan Mountains. The results show that: 1) In the eastern flank, the lower limit of coniferous forest is between 1,600 m and 2,000 m a.s.l., and the upper limit between 2,800 m and 3,000 m a.s.l.; in the western flank, the lower limit of coniferous forest is between 2,000 m and 2,300 m a.s.l., and the upper limit between 2,800 m and 3,100 m a.s.l. 2) The altitudinal ranges of coniferous forest are 806 similar to 1,435 m, 438 similar to 1,140 m for eastern flank and western flank, respectively. 3) The area of coniferous forest takes on a normal distribution with aspect, and it has a close relationship with annual insolation. This distribution model developed in this paper quantitatively reveals the significant effect of slope aspect on the distribution of coniferous forest in arid and semi-arid land.
出处	Journal of Mountain Science
卷	10
期	5
页	724-733
收录类别	SCI
语种	英语
ISSN号	1672-6316
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/30322]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Pang Y.,Zhang B. P.,Zhao F.,et al. Omni-directional distribution patterns of montane coniferous forest in the Helan Mountains of China. 2013.

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