气候变化领域集成服务门户(CCPortal): The Influences of Canopy Species and Topographic Variables on Understory Species Diversity and Composition in Coniferous Forests

CCPortal

DOI	10.1155/2014/252489
	The Influences of Canopy Species and Topographic Variables on Understory Species Diversity and Composition in Coniferous Forests
	Huo, Hong; Feng, Qi; Su, Yong-hong
发表日期	2014
ISSN	1537-744X
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.
学科领域	Science & Technology - Other Topics
语种	英语
WOS研究方向	Multidisciplinary Sciences
来源期刊	SCIENTIFIC WORLD JOURNAL
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/111752
作者单位	Chinese Acad Sci, Key Lab Ecohydrol Inland River Basin, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Huo, Hong,Feng, Qi,Su, Yong-hong. The Influences of Canopy Species and Topographic Variables on Understory Species Diversity and Composition in Coniferous Forests[J]. 中国科学院西北生态环境资源研究院,2014.
APA	Huo, Hong,Feng, Qi,&Su, Yong-hong.(2014).The Influences of Canopy Species and Topographic Variables on Understory Species Diversity and Composition in Coniferous Forests.SCIENTIFIC WORLD JOURNAL.
MLA	Huo, Hong,et al."The Influences of Canopy Species and Topographic Variables on Understory Species Diversity and Composition in Coniferous Forests".SCIENTIFIC WORLD JOURNAL (2014).