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Bottleneck is a sudden decrease of the population in size, usually due to adverse environmental factors. During bottlenecks, a population shrinks temporarily and therefore loses genetic variation. Bottlenecks also result from alterations in gene flow such as decreased migration, expansions into new habitats, or population subdivision.
See Wikipedia article Population bottleneck for further details.
- Solomon, E. P., Berg, L. R., & Martin, D. W. (2002). Biology, sixth edition. (N. Rose, Ed.). Stamford, CT: Thomson Learning.
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