Sentence examples for drastic population from inspiring English sources

that are predicted to lead to a drastic population decline.

Worldwide, amphibians have suffered drastic population declines due to climate change, pesticide use, a pathogen called the chytrid fungus and invasive species.

Even though the species numbers in the hundreds of thousands, some scientific models predict drastic population declines in emperor penguin colonies along the Antarctic Peninsula as sea ice coverage continues to decline.

Neither habitat change, competition for resources or exposure to predation provided a consistent sole explanation for the drastic population crashes shown by five smaller ungulate species (body mass 10 45 kg).

The drastic population decline in Europe after 1350 as a result of the Black Death left much arable land uncultivated and also created an acute labour shortage, both economically favourable events for the peasantry.

Drastic population declines are reported in its southern distributional range.

This genus is experiencing drastic, widespread population declines and extinctions throughout its species' ranges in Mesoamerica and South America which are closely linked to the chytrid fungus Batrachochytrium dendrobatidis [124], [125].

Although the efficiency with which purging in natural populations reduces genetic load remains uncertain, populations that have been small for a long time may be of less conservation concern than populations that have undergone recent, drastic reductions in population size (Crnokrak and Barrett 2002).

The ecology associated with natural populations of Tetrahymena imply that they periodically suffer drastic fluctuations in population size [ 44] and hence suggests that T. thermophila species must recurrently undergo sexual reproduction in order to avoid the deleterious effects seen in our laboratory experiments due to extreme and periodic size reductions.

In particular, colonising populations subjected to genetic drift processes due to drastic decreases in population size (i.e. bottlenecks), or confronted by new ecological conditions, could constitute an excellent model for carrying out these studies and evaluate the effect of demography versus selection.

Consequently, the drastic reduction in population size (i.e. bottleneck) associated with the fragmentation of a supposedly panmictic population could have been genetically marked by a decrease in allelic diversity, and later in heterozygosity [ 12].