作　　者： ; ; ; ;

机构地区： 安徽师范大学生命科学学院

出　　处： 《生物多样性》 2005年第2期156-161,共6页

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 (Alligatorsinensis)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。 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.

关 键 词： 野生扬子鳄 特征分析 国家级自然保护区 主成分分析方法 水体 值 资源选择函数 植被盖度 土壤质地 植被类型 生境选择 年 抽样调查 生态因子 稳定度 丰富度 水域 安徽省 岛屿 水面 螺类 密度 苦竹

领　　域： [生物学] [农业科学] [农业科学]