Acta Geographica Sinica ›› 2004, Vol. 59 ›› Issue (6): 889-894.doi: 10.11821/xb200406011

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Richness of Seed Plants in Relation with Topography in Hunan Province

WANG Zhiheng, CHEN Anping, FANG Jingyun   

  1. Department of Ecology, and Key Laboratory for Earth Surface Processes of the Ministry of Education, Peking University, Beijing 100871, China
  • Received:2004-02-20 Revised:2004-04-10 Online:2004-11-25 Published:2010-09-09
  • 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)

Abstract:

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