地理学报 ›› 2004, Vol. 59 ›› Issue (6): 889-894.doi: 10.11821/xb200406011

• 植物生态 • 上一篇    下一篇

湖南省种子植物物种丰富度与地形的关系

王志恒,陈安平,方精云   

  1. 北京大学环境学院生态学系、北京大学地表过程分析与模拟教育部重点实验室,北京 100871
  • 收稿日期:2004-02-20 修回日期:2004-04-10 出版日期:2004-11-25 发布日期:2004-11-25
  • 作者简介:王志恒 (1978-), 男, 博士研究生, 主要研究方向为植被生态学。E-mail: zhwang@water.pku.edu.cn
  • 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

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: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)

摘要:

为探讨区域尺度物种丰富度与地形的关系,利用湖南省地方植物志资料和地形图,借助GIS软件等手段,在定量分析湖南省地形的海拔分异特征的基础上,研究了湖南省种子植物的物种丰富度和物种密度沿海拔梯度的变化趋势,以及他们与地形复杂度的关系,得到如下结果:(1) 随着海拔的升高,科、属、种丰富度和物种密度均呈现先增大后减小的趋势,也即物种丰富度和物种密度均在中海拔地区达到最高;(2) 随地形复杂度的增加,物种丰富度和物种密度呈现先增大后减少的趋势,即中等复杂程度的地形,具有较高的丰富度和物种密度。

关键词: 湖南, 物种丰富度, 海拔, 地形, 种子植物

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