Null PhyloSor values of phylogenetic beta-diversity
PhyloSor values obtained by randomization for different choices of null models
phylosor.rnd(samp,tree, cstSor=TRUE, null.model=c("taxa.labels",
"frequency","richness","independentswap","trialswap"),
runs=999, iterations=1000) samp |
Community data matrix |
tree |
Object of class phylo - a rooted phylogeny |
cstSor |
TRUE if the Sorensen similarity should be kept constant across communities. FALSE otherwise |
null.model |
Null model to use (see Details section) |
runs |
Number of randomizations |
iterations |
Number of iterations to use for each randomization (for independent swap and trial null models) |
Currently implemented null models (arguments to null.model):
Shuffle community data matrix labels. Maintains species richness in each community and species shared between communities. Should be used with cstSor=TRUE
Randomize community data matrix abundances within species (maintains species occurence frequency). Does not maintain species richness in communities nor species shared between communities. Can only be used with cstSor=FALSE
With cstSor=TRUE: For each pair of community, maintains species richness in each community and species shared between communities. Sample in the species pool with equal probability; With cstSor=FALSE: Maintains species richness in each community, does not maintain species shared between communities. Sample in the species pool with equal probability
Randomize community data matrix with the independent swap algorithm (Gotelli 2000) maintaining species occurrence frequency and sample species richness. Can only be used with cstSor=FALSE
Randomize community data matrix with the trial-swap algorithm (Miklos & Podani 2004) maintaining species occurrence frequency and sample species richness. Can only be used with cstSor=FALSE
A list of length the number of runs. Each element of the list is a distance matrix containing the PhyloSor values of phylogenetic beta-diversity obtained by randomization
Helene Morlon <morlon.helene@gmail.com> and Steven Kembel <steve.kembel@gmail.com>
Bryant, J.B., Lamanna, C., Morlon, H., Kerkhoff, A.J., Enquist, B.J., Green, J.L. 2008. Microbes on mountainsides: Contrasting elevational patterns of bacterial and plant diversity. Proceedings of the National Academy of Sciences 105 Supplement 1: 11505-11511
data(phylocom) phylosor.rnd(phylocom$sample,phylocom$phylo,cstSor=TRUE,null.model="richness",runs=5)
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