The Influences of Canopy Species and Topographic Variables on Understory Species Diversity and Composition in Coniferous Forests (SCI)

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	The Influences of Canopy Species and Topographic Variables on Understory Species Diversity and Composition in Coniferous Forests (SCI)
	Huo H. ; Feng Q. ; Su Y. H.
刊名	Scientific World Journal
	2014
卷号	8
英文摘要	Understanding the factors that influence the distribution of understory vegetation is important for biological conservation and forest management. We compared understory species composition bymulti-response permutation procedure and indicator species analysis between plots dominated by Qinghai spruce (Picea crassifolia Kom.) and Qilian juniper (Sabina przewalskii Kom.) in coniferous forests of the Qilian Mountains, northwestern China. Understory species composition differed markedly between the forest types. Many heliophilous species were significantly associated with juniper forest, while only one species was indicative of spruce forest. Using constrained ordination and the variation partitioning model, we quantitatively assessed the relative effects of two sets of explanatory variables on understory species composition. The results showed that topographic variables had higher explanatory power than did site conditions for understory plant distributions. However, a large amount of the variation in understory species composition remained unexplained. Forward selection revealed that understory species distributions were primarily affected by elevation and aspect. Juniper forest had higher species richness and alpha-diversity and lower beta-diversity in the herb layer of the understory plant community than spruce forest, suggesting that the former may be more important in maintaining understory biodiversity and community stability in alpine coniferous forest ecosystems.
收录类别	SCI
公开日期	2015-12-24
内容类型	期刊论文
源URL	[http://ir.casnw.net/handle/362004/25160]
专题	寒区旱区环境与工程研究所_中科院寒区旱区环境与工程研究所（未分类）_期刊论文
推荐引用方式 GB/T 7714	Huo H.,Feng Q.,Su Y. H.. The Influences of Canopy Species and Topographic Variables on Understory Species Diversity and Composition in Coniferous Forests (SCI)[J]. Scientific World Journal,2014,8.
APA	Huo H.,Feng Q.,&Su Y. H..(2014).The Influences of Canopy Species and Topographic Variables on Understory Species Diversity and Composition in Coniferous Forests (SCI).Scientific World Journal,8.
MLA	Huo H.,et al."The Influences of Canopy Species and Topographic Variables on Understory Species Diversity and Composition in Coniferous Forests (SCI)".Scientific World Journal 8(2014).