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beta_i
2013 Sep 06
1
Fwd: calculating dissimilarity index of islands (vegan and betapart)
...issimilarity index for island.
(Does it compare species presence/absence between a pair of island?
Should the two islands be specifically located or close to each other?)
Thank you
Elaine
Code
# NMDS
library(MASS)
library(vegan)
island.NMDS <- metaMDS(island,k=2, distfun = betadiver, distance =
"sim",trymax=100,zerodist="add")
plot(island.NMDS, type = "n")
#Simpson Dissimilarity Index
library(betapart)
island.dist<-beta.pair(island, index.family="sor")
class(island.dist)
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