七星瓢虫分布型的判定模型

七星瓢虫分布型的判定模型

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contributed at 2018-12-04

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Affiliation:  
岳天祥编著
Email:  
yue@lreis.ac.cn
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Geography SubjectPhysical GeographyEcosystem

Detailed Description

七星瓢虫分布型的判定模型

1)从种群扩散型指数判定:
     1
)扩散指数C模型:

     2)负二项分布k值模型:


     3
Morisita指数模型:


式中,n为抽样数;N为总虫数。

2)从种群的平均密度和平均拥挤度判定:

 1)平均拥挤度模型:


式中,为每个样方的个体数;N为总个体数。

     2)改进的Iwao-m模型:


式中,为基本集合度指数

 

 

参考文献

    蔡晓明,尚昌玉,阎桂云等:大白菜上七星瓢虫空间格局及抽样技术研究。生态学杂志,1991105

How to cite

《资源环境数学模型手册》 (2018). 七星瓢虫分布型的判定模型, Model Item, OpenGMS, https://geomodeling.njnu.edu.cn/modelItem/daadab32-4fd2-452c-8b00-331d0267855d
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Contributor

contributed at 2018-12-04

Authorship

Affiliation:  
岳天祥编著
Email:  
yue@lreis.ac.cn
Homepage:  
View
Is authorship not correct? Feed back

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