No need for niches? Neutral theory explains biodiversity when species are identical. Niche differences, or the unique ways that each species “makes its living” in nature, are the classical ...

Although measuring a species' niche breadth is not a simple task given the large number of potentially relevant factors that may limit the survival and reproduction of a species, there is ...

Another unifying factor is the rule of natural selection, which continues to act on species that have adapted to an environmental niche. A combination of the two -- natural selection and gene flow ...

There are now at least 13 species of finches on the Galapagos Islands, each filling a different niche on different islands. All of them evolved from one ancestral species, which colonized the ...