摘要
点格局分析函数是分析种群空间分布格局的常用方法之一,其关键问题是边缘效应的校正。将边缘效应的权重值定义为以分布点为圆心,尺度距离为半径作圆,圆在样地内的面积部分与整个圆面积之比。利用该面积比定义的边缘效应系数分析了越冬水稻二化螟幼虫在不同尺度下的空间分布型。研究结果显示点格局分析函数能够反映出不同尺度下昆虫种群空间格局,其分析结果对合理制定抽样计划具有重要的指导作用.点格局分析函数在水稻越冬二化螟幼虫的应用分析中表明:在田间研究中其取样尺度不应小于2m。
Function in analysis of spatial point pattern is one of the prevalent analysis tools for studying population spatial pattern,and the method of edge correction is the key part of the function.The method of area ratio,the area of a circle in sample plot to the whole area of the circle,in which the distributing point is the center and the scale distance is the radius,is defined as the weighted coefficient of edge correction in this paper.Spatial distribution pattern in the population of Chilo supperssalis was analyzed using the method of area ratio.Results indicate that the function can reflect the spatial distribution pattern of insect population in different scales,and are of benefit to make a reasonable plan in sampling.It also shows that the sampling-size in chilo supperssalis should be not less than 2m in field.
出处
《生态学报》
CAS
CSCD
北大核心
2009年第4期1804-1813,共10页
Acta Ecologica Sinica
基金
国家重点基础研究发展计划(973计划)资助项目(2006CB102006)
关键词
点格局分析
昆虫种群
空间分布格局
面积比
边缘效应
二化螟
point pattern analysis
insect population
spatial distribution pattern
area ratio
edge effect
Chilo supperssalis
