Island's of the Bahamas. Abaco, to the east of Grand Bahama, also receives similar weather, though its easterly position means it has greater exposure to the north-easterly trade winds. While this tempers the extremes of temperature, it also means it is at greater risk of hurricanes.
Genetic pollution is the term of genetics in which the genetic information is transferred in to the organisms where it is not needed or where this information never existed before. This flow of genetic information is usually undesired and cannot be controlled.
Genetic drift is when a population experiences a decrease in variation and population size by chance due to the bottleneck or the founders' effect. For example, a volcanic eruption kills most of the flowers in a nearby area. This bottleneck effect reduces the variety of alleles and traits of the flowers by reducing their number.