种相似与属相似系数

种相似与属相似系数

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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

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种相似与属相似系数

1)种相似性系数的计算公式:
     1
Jaacard系数:


式中,SJJaccard系数;A为甲地区全部种数;B为乙地区全部树种;c为两个地区共有种数;a为甲地区独有种;b为乙地区独有种;ABc均不含世界种和外来种。

     2Czechanowski系数:

式中,SCCzechanowski系数。

2)属相似系数:

式中,SS为属相似系数;AB分别为甲乙两地区植物区系中非世界属数;C为两个地区共有的非世界属数。

 

 

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《资源环境数学模型手册》 (2018). 种相似与属相似系数, Model Item, OpenGMS, https://geomodeling.njnu.edu.cn/modelItem/c448ba99-e653-4072-8439-d13ce039e549
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Contributor

contributed at 2018-12-04

Authorship

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

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