湖南省种子植物物种丰富度与地形的关系
收稿日期: 2004-02-20
修回日期: 2004-04-10
网络出版日期: 2004-11-25
基金资助
国家重点基础研究发展计划 (G2000046801); 国家自然科学基金项目 (49971002; 39830050); 教育部科学技术重点项目 (99001)
Richness of Seed Plants in Relation with Topography in Hunan Province
Received date: 2004-02-20
Revised date: 2004-04-10
Online published: 2004-11-25
Supported by
National Basic Research Program of China, No.G2000046801; National Natural Science Foundation of China, No.49971002; No.39830050; Key Project of Science and Technology MOE (No. 99001)
王志恒,陈安平,方精云 . 湖南省种子植物物种丰富度与地形的关系[J]. 地理学报, 2004 , 59(6) : 889 -894 . DOI: 10.11821/xb200406011
To explore relationship between species richness and topography at a regional scale, topographical features, patterns of taxa (family, genus and species) richness and species density along elevational gradients, and relationships between degree of topographical variation, expressed as coefficient of variation(CV) of elevation, and species richness and species density in Hunan Province were studied by using provincial flora list and DEM (Digital Elevation Model) data. The results indicate that: (1) With an increase of elevation, taxa richness and species density increased first and then decreased, showing a unimodal pattern along an elevational gradient; and (2) with increasing CV of altitude, species richness and species density increased first and then decreased, namely, higher species richness and species density occurred at habitats with a moderate CV value.
Key words： Hunan Province; species richness; elevational gradient; topography; seed plants
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