After a natural disturbance causes mortality in a population, there is a change in the population's gene pool. this is known as a Bottleneck Effect.
Bottleneck Effect- The bottleneck effect is a phenomena that occurs when a population's gene pool suddenly shrinks as a result of a natural environmental occurrence, a natural disaster, a disease, or human activity. A bias that wasn't there in the initial population will probably result from this shrinkage of the gene pool.
Gene Pool- A gene pool is the collection of all the alleles (including alleles) found in a population or species that is capable of reproduction. A big gene pool has a wide range of genetic diversity and is more resilient to environmental stresses.
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