摘要
2003年9月～2004年8月，通过铗日法对四川南充城区的鼠型小兽生态位进行了研究。在调查地共发现8种鼠型小兽，其中食虫类2种、啮齿类6种。微尾嗣Anourosorexsquamipes和褐家鼠Ratttaus norvegicus的空间生态位宽度指数最高，分别为0．860和0．816；社鼠Niviventerconfucianus次之，为0．619；灰麝嗣Crociduraattenuata最低，为0．001，几乎等于0。小家鼠Musmwcuzw和社鼠的空间生态位重叠指数最高，为0．789；社鼠与微尾嗣空间生态位重叠指数次之，为0．664；黄胸鼠Rattus flavipectus与小家鼠，黑线姬鼠Apodernus agrarius与小家鼠、灰麝嗣的生态位重叠指数均为0，不存在对资源利用的竞争。在研究的生境中，鼠型小兽表现出对不同生境有较强适应性，但对资源利用存在较小程度的趋同性。
The niche traits of small mammal using day-trapped method were studied in Nanchong City, Sichuan Province, from September 2003 to August 2004. The results showed that eight species of small mammals were found in the study area. Their spatial niches among the five sites were assessed using the Shannon-Wiener niche breadth index and the Cowell niche overlap index. The Shannon-Wiener niche breadth index was the highest for Anourosorex squamipes and Rattus norvegicus （0. 860 and 0.816, respectively）, intermediate for Niviventer confucianus （0. 619） and the lowest for Crocidura attenuata （0.001）. The Cowell niche overlap indices of 2-paired species were the highest and varied from 0. 664 to 0.798, sugges- ting their spatial niches overlapped almost completely. Conversely, the spatial niche overlap indices for Rattus flavipectus and Mus musculus, Apodemus agrarius, M. musculus and C. attenuata were zero thus indicating a complete absence of competition among them. The small mammals not only have strong adaptability in five different sites, but also have less consistency for utilizing resources.
出处
《四川动物》
CSCD
北大核心
2008年第4期635-638,共4页
Sichuan Journal of Zoology
基金
四川省重点学科重点资助项目(SZD0420)
