The rate at which new species are formed in a group of closely related animals decreases as the total number of different species in that group goes up, according to new research. The research team believes these findings suggest that new species appear less and less as the number of species in a region approaches the maximum number that it can support. In order for new species to thrive, they need to evolve to occupy their own niche in the ecosystem, relying on certain foods. (source: sciencedaily.com)
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