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- Variations emerge in different parts of a species’ range, creating differences between populations (see example below). In one part of a range the birds may possess long tails, in others, square tails. But because the birds also mate with their neighbors, they do not become isolated into a species of their own.
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The Biological Species Concept. By far the most well-known species concept is the biological species concept, which was proposed by evolutionary biologist Ernst Mayr. The biological species concept states that a species is a group of actually or potentially interbreeding natural populations which are reproductively isolated from other such groups.
Apr 25, 2005 · For example, the biological species concept emphasizes the property of reproductive isolation (9, 21), the ecological species concept emphasizes occupation of a distinct niche or adaptive zone (22, 23), one version of the phylogenetic species concept emphasizes diagnosability (24, 25) and another, monophyly (26, 27).
After articulating the biological species concept in 1942, Mayr played a central role in the species problem debate over what was the best species concept. He staunchly defended the biological species concept against the many definitions of "species" that others proposed.
For example, the biological species concept emphasizes the property of reproductive isolation (Dobzhansky, 1970; Mayr, 1942), the ecological species concept emphasizes occupation of a distinct niche or adaptive zone (Andersson, 1990; Van Valen, 1976), one version of the phylogenetic species concept emphasizes diagnosability (Cracraft, 1983 ...
Ernst Mayr and the Evolutionary Synthesis. Ernst Mayr helped define the modern synthesis of evolutionary theory, proposing the " Biological Species Concept ." In particular, his work...
TABLE 1. The biological species concept and some recently proposed alternatives. Biological Species Concept A species is a group of individuals fully fertile inter se, but barred from interbreeding with other simi-lar groups by its physiological properties (produc-ing either incompatibility of parents, or sterility of
Apr 25, 2005 · Ernst Mayr played a central role in the establishment of the general concept of species as metapopulation lineages, and he is the author of one of the most popular of the numerous alternative definitions of the species category. Reconciliation of incompatible species definitions and the development of a unified species concept require rejecting ...
