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.
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
出处
《应用与环境生物学报》
CAS
CSCD
2003年第2期175-178,共4页
Chinese Journal of Applied and Environmental Biology
基金
杭州市新世纪"131"优秀中青年人才基金项目~~
