Multiple Source Pools and Dispersal Barriers for Galápagos Plant Species Distribution

Alan J. Yeakley & John F. Weishampel
We reexamined geographic factors explaining the number of plant species on islands in the Galápagos Archipelago. We hypothesized that plant species richness (S) was related to the number of source pools and that plant species dispersal preferentially followed direct, oceanic pathways. To test different dispersal pathways from multiple source pools, the total number of islands within a given dispersal radius (i) was posed as the sum of the number of line-of-sight islands (Cᵢ) and of...
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