How to root a phylogenetic tree when calculating phylogenetic diversity in plant community?
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4.0 years ago
shadowstep • 0

I randomly draw some species (say 1, 2 and 4) from a 8 common species pool to assemble the communities, then transplant a special species X into the communities. Now I want to measure the effect of phylogenetic diversity of the communities, on the growth performance of species X.

Q1: I first estimated a phylo tree of the common species in communities, without species X, to calculate PD. In the R package picante, even if I used a unrooted tree, to calculate PD of a community with only one common species, the pd() function will return me a value (NOT 0), so what does this value mean? Does a community with only one species really have a phylogenetic diversity?

Q2:Otherwise, what criterion should I use to choose a correct root for a specific phylo tree?

Thanks for you help!

Phylogeny • 1.3k views

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