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Two or more populations of a species isolated by ecologic barriers, theoretically able to exchange genes and interbreed, but partially separated from one another by differences in habitat or behavior.
Farlex Partner Medical Dictionary © Farlex 2012
ecospeciesa species of plant or animal that can be divided into several ECOTYPES (see CENOSPECIES which are able to exchange genes freely without loss of fertility or vigour in the offspring.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005