---------- Forwarded message ----------
From: *Benjamin O'Leary* <benjamin.ole...@monash.edu>
Date: Tuesday, 8 December 2015
Subject: Community analysis of average plant trait values with phylogenetic
context
To: Xianyun Mao <xianyun...@gmail.com>, tm...@psu.edu,
rossellda...@gmail.com, steve.kem...@gmail.com, dacke...@berkeley.edu,
s.blombe...@uq.edu.au, cornw...@zoology.ubc.ca, p...@berkeley.edu,
mrhel...@wisc.edu, morlon.hel...@gmail.com, cw...@oeb.harvard.edu
Hi All,
My name is Ben O'Leary, i am a student at Monash university in Melbourne
Australia. I have recently completed an honours project which i now hope to
publish as a paper. I have studied a range of leaf trait values of
Australia's Eucalyptus species. I have also built a phylogenetic tree for
the species. We have produced regional averages for a number of traits
which we then compared against regional averages in environmental
variables. There appears to be some correlation between trait values and
environmental data, however we now want to perform a similar analysis which
takes community averaged/regional phylogenetic relationships into account.
We have run a PGLS analysis but that focuses on individuals species rather
than regional assemblages. Is there a PGLS equivalent for analyzing mean
trait values for mutiple communities as a function of environmental
variables, taking into account the phylo relationships of the community
members, and if so can you suggest a package/paper/example? We have used
within and between region mean phylogenetic distance and mean nearest
neighbour phylogenetic distance as our metrics and we will now also
investigate the Sorenson index.
For any statistical analysis we will run, i'm wondering how the covariance
matrix is built. As an alternative if no predesigned system exists, could
we incorporate something like a between community MPD as our covariance?
What then would make up the line of variance? Also does the matrix need to
ultra metric?
Thanks very much for your help
Kind regards
Ben
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