MBI: crich – R documentation

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crich

Calculate Carvalho's multiple-site richness difference index

Description

Another version is the average of Carvalho's pairwise-site richness difference index across all pairs of sites, see the function of mrich()

Usage

crich(data)

Arguments

data

rows of the data are sites, while columns of the data are species

Author(s)

Youhua Chen <haydi@126.com>

References

Chen Y (2012) MBI: an R package for calculating multiple-site biodiversity indices. Submitted.

Carvalho J, Cardoso P, Gomes P (2012) Determining the relative roles of species replacement and species richness differences in generating beta-diversity patterns. Global Ecology and Biogeography, 21, 760-771.

Examples

test<-c(90,30,11,5,100,46,19,70,19,1,
        17,0,0,0,30,4,20,26,12,5,37,
		0,25,0,60,30,29,42,36,19,32,
		12,0,0,50,6,39,35,18,0,35,0,
		28,0,70,35,56,49,42,0,81,15,
		36,0,90,45,72,63,54,9,13,0,
		0,5,20,1,4,0,0,0,0,0,0,0,10,
		0,0,0,41,4,72,24,7,0,80,1,64,
		56,48,0,36,0,29,0,40,32,32,2,0,0)
test<-matrix(test,10,10)
crich(test)

MBI

(M)ultiple-site (B)iodiversity (I)ndices Calculator

v1.0

GPL-2

Authors

Youhua Chen

Initial release

2012-10-17