Sentence examples for considerable population decline from inspiring English sources

Ch. montanus is sensitive to droughts and habitat deterioration and has shown considerable population decline in the study area (Rohde unpublished observations), whereas Ch. parallelus has stable (or even increasing) populations.

Overall, our results from the various approaches discussed here, such as decreases in allelic diversity, heterozygosity within populations, increased differentiation among populations and evidence for a demographic bottleneck based on coalescent simulations, suggest that a population decline of considerable effect has occurred between the historical and contemporary period.

As such, even 3% survival through a population decline could leave a considerable number of genotypically diverse individuals for population recovery the following year, facilitating the maintenance of high levels of diversity and preventing population differentiation over time.

As a consequence of their value and population decline, T. thynnus has been the focus of considerable research effort concerning many aspects of their life history.

Considerable efforts are presently being made to understand the causes of this recent population decline [ 4, 5], especially because several other pelagic species have shown similar population trends.

Thus overall population decline is serious.

Its slaveholding society mixed the ugliest brutality with tolerance for a considerable population of free blacks.

It is an increasing issue in the CBD, now home to a considerable population.

New Zealand has a considerable population of self-employed immigrants.

First, childlessness has demographic implications like declining birth rates and population decline and ageing.

This paper summarises the likely reasons for the population decline.