野生扬子鳄洞穴口的位置选择  

Position of Burrow Entrances in Wild Chinese Alligators

作　　者：丁由中[1] 王小明[1] 何利军[1] 王正寰[1] 吴巍[1] 陶峰勇[1] 邵民[2] 

机构地区：[1]华东师范大学生命科学学院,上海200062 [2]安徽扬子鳄国家级自然保护区,安徽宣州242000

出　　处：《Zoological Research》2003年第4期254-258,共5页动物学研究（英文）

基　　金：上海市"曙光计划"项目 ( 98SG0 8) ;美国野生动物保护协会 (WCS) ;上海市重点学科基金 ;教育部跨世纪优秀人才培养计划 ;国家"2 11"重点建设生态学科基金资助项目

摘　　要：1999年至 2 0 0 2年 7～ 10月内的 4个时段 ,在安徽扬子鳄国家级自然保护区内调查发现野生扬子鳄洞穴 4 0个 (现用 2 4个 ,遗弃 16个 )。对洞口的方向、隐蔽程度、距水面高度、与水源距离及与村落距离等 5个可能影响扬子鳄洞穴选择的环境变量做了测定。结果表明 :87 5 %的洞口在水面 0～ 0 5m及 <0m ,85 0 %距水源 <5m ,32 5 %朝北 ,72 5 %植被覆盖度≤ 70 % ,4 2 5 %距村落 <10 0m ;距水面高度、与水源距离、洞口方向和隐蔽程度的主成分贡献率依次降低 ,累计达 76 6 %。The burrows of Chinese alligator ( Alligator sinensis ) were surveyed in Anhui National Natural Chinese Alligator Reserve in four periods within Jul -Oct.from 1999 to 2002.Of the found burrows,24 were in use,and 16 were deserted.Five environmental variables regarding the positions of the burrow entrances were measured.A large percent (87 5%) of entrances were located about the water surface (0-0 5 m and <0 m);85 0% were within 5 m from the water body;32 5% were towards north;72 5% were vegetation covered less than 70%;and 42 5% were within 100 m from villages.Factors such as the height above water surface,distance to water body,entrance direction,and degree of shelter contributed for 76 6% of the variance in total,and they were in descending order in the contribution.The convenience entering water body is the main factor for Chinese alligators to select the entrances.

关 键 词：扬子鳄 洞穴口 环境 位置选择 

分 类 号：Q958[生物学—动物学]