Theory of speciation (18TH CENTURY).
Also called geographic speciation, this theory is most often associated with Ernst Mayr (1904- ), an evolutionary biologist at Harvard University (although many other biologists have theorized on the subject).
It asserts that new species arise among sexually reproducing organisms because geographic isolation enables a small subgroup to diverge genetically from the larger, established population.
This isolated subgroup may diverge owing to particular environmental pressures, mutations or GENETIC DRIFT. For this subgroup to become a new species, its unique characteristics must allow it to survive in its isolated location, and its gene pool must be protected from mixing with that of other species.
Also see: ALLOPARAPATRIC SPECIATION, ALLOPATRIC SPECIATION, COHESION SPECIES CONCEPT, GENETIC REVOLUTION, PARAPATRIC SPECIATION, SALTATION SPECIATION, species essentialism, STASIPATRIC SPECIATION, SYMPATRIC SPECIATION
Source:
M Ereshefsky, The Units of Evolution: Essays on the Nature of Species (Cambridge, Mass., 1992)
Table of Contents
- 1 Videos
- 2 Related Products
- 2.1 Cynic Mana-theory Speciation Through Lung Dog Star Days Survivorship Bias - Pt 2
- 2.2 The Theory of Ecological Communities (MPB-57) (Monographs in Population Biology (57))
- 2.3 Cynic Mana-theory Speciation Through Lung Dog Star Days Survivorship Bias - Pt 1
- 2.4 The Structure of Scientific Revolutions: 50th Anniversary Edition
- 2.5 Darwin's Theory: An Introduction to Principles of Evolution
- 2.6 Speciation (Original)
- 2.7 Acquiring Genomes
- 2.8 Speciation and the Recognition Concept: Theory and Application
- 2.9 A New History of Life: The Radical New Discoveries about the Origins and Evolution of Life on Earth
- 2.10 Evolutionary Communication: An Introduction
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