| 浙西山区水库小流域放逸短沟蜷的空间格局 |
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| 引用本文： | 薛俊增,吴惠仙,宋立飞.浙西山区水库小流域放逸短沟蜷的空间格局[J].应用与环境生物学报,2003,9(2):175-178. |
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| 作者姓名： | 薛俊增 吴惠仙 宋立飞 |
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| 作者单位： | 1. 杭州师范学院生物系,杭州,310036
2. 浙江大学生命科学学院,杭州,310012 |
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| 基金项目： | 杭州市新世纪“131”优秀中青年人才基金项目~~ |
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| 摘 要： | 放逸短沟蜷(Semisulcospira libertina)是浙西山区水库小流域底栖螺类的优势种，定量采集不同环境条件的9个样点的标本，分别采用Taylor幂法则、Iwao聚集格局回归分析法及Morisita指数公式计算和统计分析，结果显示，所调查流域的放逸短沟蜷种群密度差异极显著，其种群空间格局理论上属于聚集型负二项分布，主要是由环境污染和流域底质所致。图2表3参10
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| 关 键 词： | 放逸短沟蜷 浙西山区水库 小流域 空间格局 底栖螺类 优势种 种群密度 聚集型负二项分布 |
| 修稿时间： | 2002年2月8日 |
SPATIAL PATTERN OF SEMISULCOSPIRA LIBERTINA POPULATION IN SMALL WATERSHED IN WESTERN ZHEJIANG |
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| XUE Junzeng,WU Huixian & SONG Lifei.SPATIAL PATTERN OF SEMISULCOSPIRA LIBERTINA POPULATION IN SMALL WATERSHED IN WESTERN ZHEJIANG[J].Chinese Journal of Applied and Environmental Biology,2003,9(2):175-178. |
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| Authors: | XUE Junzeng WU Huixian & SONG Lifei |
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| Abstract: | Semisulcospira libertina is a dominant superior species of snails dwelling in the reservoir basin in mountains in western Zhejiang. Specimens were qualitatively collected from 9 sampling sites in different environmental conditions, and they were calculated and analyzed by Taylors Power Law, Iwao's Patch Regression and Morisition Index, respectively. The result showed that the difference of S. libertina population densities was quite significant in river basin. The spatial layout of population theoretically belonged to clumpy and negative binomial distribution, which was mainly caused by environmental pollution and features of the river basin' s bed. Fig 2 , Tab 3 , Ref 10 |
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| Keywords: | Semisulcospira libertina spatial pattern watershed |
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