Matthew Van Dam
Australasian Weevils, Biogeography and Community Assembly
more coming soon...
photos Alex Riedel
Eupholus sp. Mt. Wilhelm 900m, photo M Van Dam
Model selection and biogeography of Trigonopterus weevil dispersal paths using BioGeoBEARS. We found through model selection that figure (C) was the favored scenario for dispersal in the region, we also found distance to have an effect limiting dispersal (long distance dispersal less likely).
DEC+J+x dispersal in not limited to adjacent areas (unconstrained dispersal), blue lines denote allowed dispersal events and distances.
DEC+J+x model with dispersal constrained to adjacent areas except for the Lower Sunda island chain
DEC+J+x model, where dispersal is limited to adjacent areas
Eupholus sp. Mt. Wilhelm 900m photo M Van Dam
Below is an animation for a biogeographic reconstructed using the program bayarea and Phylowood. In the lower reconstruction one lineage is traced showing dispersal from New Guinea to Sulawesi to the Lower Sunda island chain. The results are much the same as in BioGeoBEARS mostly because each species only occupies one area. Bayarea also gave support for dispersal to new areas decreasing with distance.
Mt. Wilhelm 2200m, M Van Dam