Sentence examples for extreme population decline from inspiring English sources

Bottlenecks generate detectable genetic footprints only in cases of extreme population decline, when effective population sizes undergo a 10 1000-fold decline, or populations are reduced to a very few individuals (Ne = 10 1000-foldodecline. 2011; Peery et al. 2012).

It is possible that the population also declined for several 1000 years before this or that the reduction in genetic variety caused by the extreme bottleneck gave similar results to a more gradual population decline over a longer period.

The United States is somewhat more buffered because of its relatively high levels of immigration, but if the decline in fertility continues, demographers say, the country may face an extreme population imbalance in the future.

Nonetheless, immediate population decline should be a robust indicator of successful lethal mutagenesis by whatever mechanisms, except when extreme forms of resistance to mutagen can arise with single mutations.

Population decline follows.

Thus overall population decline is serious.

Population Decline of Unauthorized Immigrants Stalls, May Have Reversed.

We need immigrants to stop population decline.

Topics examined include aging populations, urbanization, population decline, and population projections.

Population decline in many of the provinces.

Seasonal thermal extremes might also play a crucial role in defining the distribution of species through sudden population declines or die-offs [ 39].