Answer:
Forest fires that lead to the reduction in population size of species
Explanation:
In population genetics, a genetic bottleneck is a drastic reduction in the population size, this process is expected to produce a dramatic decrease in genetic diversity (i.e., a bottleneck). The bottleneck may be the result of ecosystem disasters such as, for example, earthquakes, floods, etc., which can produce the death of an important number of members in the population. In this example, the allele frequencies in the next generation will represent the gene pool of the individuals that survived the forest fire disaster.