生物多样性

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野生扬子鳄生境特征分析

吴陆生1,吴孝兵1*,江红星2,3,王朝林4   

  1. 1 (安徽师范大学生命科学学院, “重要生物资源的保护和利用研究”安徽省重点实验室,芜湖241000)
    2 (中国林业科学研究院森林生态环境与保护研究所,北京100091)
    3 (国家林业局全国野生动植物研究与发展中心,北京100091)
    4 (安徽省扬子鳄繁殖研究中心,宣州242034)
  • 收稿日期:2004-10-08 修回日期:2004-11-29 出版日期:2005-03-20 发布日期:2005-03-20
  • 通讯作者: 吴孝兵

Habitat characteristics of wild Chinese alligator (Alligator sinensis)

Lusheng Wu1, Xiaobing Wu1, Hongxing Jiang2,3, Chaolin Wang4   

  1. 1 College of Life Sciences, Provincial Laboratory for Conservation and Utilization of Important Biological Resource, Anhui Normal University, Wuhu 241000
    2 Research Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Beijing 100091
    3 National Wildlife Research and Development Center, State Forestry Administration, Beijing 100091
    4 Anhui Research Center for Chinese Alligator Reproduction, Xuanzhou 242034
  • Received:2004-10-08 Revised:2004-11-29 Online:2005-03-20 Published:2005-03-20
  • Contact: Xiaobing Wu

摘要:

作者分别于2002和2003年抽样调查了安徽省扬子鳄国家级自然保护区有或曾经有野生扬子鳄(Alligator sinensis)分布的22个样地,选择了与野生扬子鳄生存有关的8类生态因子,即水域中岛屿情况、水域水面的稳定度、水体pH值、螺类丰富度、岸线植被盖度、岸线土壤质地、苦竹密度和植被类型,运用资源选择函数结合主成分分析方法研究了野生扬子鳄对生境的选择。结果表明岸线植被盖度对野生扬子鳄的生境选择影响最大,其次是水体pH值,再次是螺类丰富度、苦竹密度、水域水面的稳定度和土壤质地;而水域中岛屿情况与植被类型对野生扬子鳄生境选择的影响则较弱。

Abstract:

During 2002 and 2003, the habitat characteristics of wild Chinese alligator were studied in the National Nature Reserve for Chinese Alligator in the south of Anhui Province by collecting samples from among the 22 locations where wild Chinese alligator used to occur or occur currently. Eight ecological factors potentially related to alligator occurrence, i.e., shelter condition of bank, situation of islands, stability of water, pH value of water area, snail abundance, texture of soil, density of bamboo, and vegetation type, were measured according to data collected from each location. The habitat characteristics of wild Chinese alligator have been analyzed and studied with the methods of resource selection functions (RSF) and principal component analysis. The results showed that association of the above 8 factors to the survival of the wild Chinese alligator followed the following descending order: shelter condition of bank, pH value of water area, snail abundance, density of bamboo, stability of water, texture of soil, situation of islands and vegetation type, with the shelter condition of bank as the major factor (OR=13.628) and situation of islands and vegetation type as the least associated.