Functions to calculate the ecological distance between two groups
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species from group A
species from group B
You must provide two separate vectors, with species arranged in the same order, from area A and B. If species are present in one site but not the other, these must be recorded for both sites; the site where they are not found should be coded as a zero. For details on each index, please consult the references.
Returns the similarity index for the two sites in question.
Shi, G. R. 1993. Multivariate data analysis in palaeoecology and palaeobiogeography – a review. Palaeogeography, Palaeoclimatology, Palaeoecology 105: 199–234.
Magurran, A. E. 2004. Measuring Biological Diversity. Oxford, Blackwell.
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Loading required package: sp Loading required package: maps Loading required package: shapefiles Loading required package: foreign Attaching package: 'shapefiles' The following objects are masked from 'package:foreign': read.dbf, write.dbf  0.6060606  0.4285714  0.6  0.6  0.7806971
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