This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Small_population_size


00:00:31 1 Demographic effects
00:02:30 2 Environmental effects
00:03:46 3 Genetic effects
00:05:17 3.1 Contributing genetic factors
00:09:15 4 Island populations
00:10:36 5 Conservation
00:11:08 6 See also



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SUMMARY
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Small populations can behave differently from larger populations. They are often the result of a population bottlenecks from larger populations, leading to loss of heterozygosity and reduced genetic diversity and loss or fixation of alleles and shifts in allele frequencies. A small population is then more susceptible to demographic and genetic stochastic events, which can impact the long-term survival of the population. Therefore, small populations are often considered at risk of endangerment or extinction, and are often of conservation concern.