Topic for today
Biogeography – the study of species distributions
Fig. 6.6 new (6.5 old)
What factors influence species distributions?
Historical remnants of artic climate on “shelf” habitats near
Questions in the field of biogeography
1. Historical aspects
Biogeographic realms of Wallace reflect ancient divisions
Not in newer edition of the book (Fig. 6.2 old)
Testing hypotheses with phylogenies
1. What phylogenetic pattern would you expect with dispersal?
Fig. 6.9 new (6.8 old)
Phylogenetic pattern with vicariance?
Extinction complicates matters
Pattern of island immergence forms expectation of sequential dispersal
Fig.6.10 new (6.9 old)
Successive division of Gondwanaland forms expectation
1. Three tests of vicariance hypothesis
2. What kind of species might you select?
Fig. 6.10 old
Does the phylogeny chameleons support vicariance?
Fig. 6.11 (new and old)
Does the phylogeny of cichlids support vicariance?
Not in newer version of the book (Fig. 6.12 old see below)
Does the phylogeny of flightless birds support vicariance?
Phylogeny of flightless birds
Not in newer version of the book (Fig. 6.13 old)
Hypotheses about human evolution distinguished
Fig. 6.16 (new and old)
Which hypothesis is supported by mitochondrial DNA?
Fig. 6.17(new and old)
Which hypothesis is supported by DNA on Y chromosome?
Fig. 6.18 (new and similar old 6.18)
Pleistocene change revealed by distribution of mitochondrial haplotypes
Fig. 6.15 new (6.19 old)
Fig. from Godbout et al. 2005. Link on web