干旱区生态环境知识资源中心(Arid): 贺兰山木本植物群落物种多样性的海拔格局

Arid

	贺兰山木本植物群落物种多样性的海拔格局
其他题名	ALTITUDINAL PATTERN OF SPECIES DIVERSITY IN WOODY PLANT COMMUNITIES OF MOUNTAIN HELAN, NORTHWESTERN CHINA
	朱源 1; 康慕谊 1; 江源 1; 刘全儒 2
ISSN	1005-264X
出版年	2008
卷号	32 期号:3 页码:574-581
中文摘要	贺兰山位于中国温带草原和温带荒漠的过渡带,是研究干旱区山地物种多样性海拔格局的理想区域.该文通过样方法调查研究区的森林和灌丛群落,并运用广义可加模型分析物种多样性的海拔分布格局.结果表明:(1)海拔是物种丰富度的重要影响因子,一般能解释原始数据30%～40%的变差.(2)对于森林和灌丛群落,草本植物都是群落中比例最高的物种,而且决定了群落总物种丰富度的海拔分布格局.(3)森林群落的乔木层物种丰富度在中海拔区域最高,反映了中海拔区域相对优越的水热条件.灌木层和草本层的物种丰富度明显受到乔木层郁闭度的影响,有随海拔升高而降低的趋势.(4)灌丛群落的灌木层和草本层物种丰富度均呈单峰格局,皆因低海拔的干旱和高海拔的寒冷抑制了多数物种的生存,仅气候条件适宜的中海拔区域能够生存丰富的物种.
英文摘要	Aims Our objective was to reveal the altitudinal pattern of species diversity in woody plant communities of Mountain Helan, which is located on the ecotone between temperate steppe and desert regions in arid northwestern China.Methods We surveyed forests and shrublands with the quadrat method and used Generalized additive model (GAM) to model relationships between species richness of tree, shrub and herbaceous layers with altitude. Important findings Altitude accounted for 30%-40% of the variances of species richness patterns, including tree, shrub, herb and total species richness. Both for forest and shrubland communities, 60%-80% of the species were herbaceous and patterns of total species richness with altitude were almost determined by herbaceous species. In forest communities, species richness of the tree layer peaked at middle altitude, because of favorable precipitation and temperature. Species richness of shrub and herbaceous layers in forest communities decreased with altitude, showing a significant influence of forest canopy cover. For shrub communities, species richness of shrub and herb layers also peaked at middle altitude. Aridity at low altitude and cold at high altitude limited species’ survival, and only at middle elevations could coexist large numbers of plant species.
中文关键词	物种丰富度 ; 森林群落 ; 灌丛群落 ; 广义可加模型 ; 海拔格局
英文关键词	species richness forest communities shrub communities generalized additive model altitudinal pattern
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:3279808
来源机构	北京师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/223033
作者单位	1.北京师范大学资源学院, 地表过程与资源生态国家重点实验室, 北京 100875, 中国; 2.北京师范大学生命科学学院, 北京 100875, 中国
推荐引用方式 GB/T 7714	朱源,康慕谊,江源,等. 贺兰山木本植物群落物种多样性的海拔格局[J]. 北京师范大学,2008,32(3):574-581.
APA	朱源,康慕谊,江源,&刘全儒.(2008).贺兰山木本植物群落物种多样性的海拔格局.,32(3),574-581.
MLA	朱源,et al."贺兰山木本植物群落物种多样性的海拔格局".32.3(2008):574-581.