Bottlenecks and Founder Effects. Genetic drift can cause big losses of genetic variation for small populations. Population bottlenecks occur when a populations size is reduced for at least one generation.ottlenecks and Founder Effects. Genetic drift can cause big losses of genetic variation for small populations. Population bottlenecks occur when a populations size is reduced for at least one generation.
Chernobyl, or Chornobyl, is the name of a city situated in northern Ukraine near the border with Belarus. Chernobyl was largely abandoned following the disaster at the Chernobyl Nuclear Power Plant located 14.5 kilometres (9 miles) away.
A graveyard for vehicles highly contaminated by radiation, near the Chernobyl nuclear power plant, seen on November 10, 2000. Some 1,350 Soviet military helicopters, buses, bulldozers, tankers, transporters, fire engines and ambulances were used while fighting against the April 26, 1986 nuclear accident at Chernobyl. man lights a candle at the Chernobyl victims' monument in Slavutich, some 50 kilometers (30 miles) away from the accident's site, and where many of the power station's personnel used to live, during a memorial ceremony on the night of April 25-26, 2009. #.