Notes from presentation
1. Species-area curve:
- Species sorting by environment.
- species clustering due to limited dispersal
- Random displacement (faster saturation)
- In-situ speciation looks like clustering
- Compare to colonization
- Phylogenetic species variability metric: compare phylogenetic covariance matrix to a star-phylogeny, not expected to increase with area.
\[ \frac{n \textrm{tr}C - \sum C }{n(n-1)}\]
2. Simulations:
- species sort along an environmental gradient. BM trait determining position. : closely related species clustered. Similar species are clustered.
- limited dispersal. BM trait for dispersal. Closely related species are not clustered.
- random placement, proportional to abundance. Phylogeny proportional to abundance. no clustering.
- hmm, limited dispersal isn’t same as dispersal evolving. differing in size
- have individual placement
- species-area curve is very poor measure of clustering?
- phylomatic tree. yikes.
- decreasing phylo diversity with area. phylogenetic repulsion
3. macroevolution simulation
- each island assigned an extinction probability, exp decrease with is. area.
- in situ speciation vs colonization probability
- More in situ speciation generates more clustering, as expected.
- phylo diversity vs area: no relationship. (Obviously colonizations make large diversity)
- ecologically neutral. island diversity
- colonization and in situ speciation events not area dependent
Anoles example
Notes from tutorial
- Overview of linear mixed models, generalized lmm, phylogenetic glmm.
- Random effects with phylogenetic correlations.
- consider a phylogeny with trait as prevelance, overdispersed.