Sentence examples for maintain stable populations from inspiring English sources

By the 1980s the fertility levels in most industrialized countries were very low, at or below those needed to maintain stable populations.

The more distantly related pairs were more likely to coexist in the microcosms and maintain stable populations until the end of the experiment.

The plant's ability to host both pests and beneficials makes it potentially useful to maintain stable populations of insects used for biological control in other cultures, like Campylomma verbasci and Dicyphus hesperus (Miridae), a predator of whiteflies.

These small islands are naturally home to anoles and maintain stable populations in the absence of major disturbance [15].

When we used the average estimate of 0.27 in the matrix, severe years could be no more frequent than 0.21 for rock ptarmigan and 0.32 for white-tailed ptarmigan to maintain stable populations (λ ≥ 1, Figure  2).

Both the escape and tolerance strategies are adaptive responses to environmental selective pressures and may coexist in a population, but the tolerance strategy helps to maintain stable populations over time and is of interest for breeding varieties with a higher yield stability in changing environments [ 21].

Definitions of the niche date back to 1917, but G. Evelyn Hutchinson made conceptual advances in 1957 by introducing a widely adopted definition: "the set of biotic and abiotic conditions in which a species is able to persist and maintain stable population sizes".

A species' niche is the multidimensional set of biotic and abiotic conditions in which it is able to persist and maintain stable population sizes.

Artificially maintaining stable populations on plants, by accurately manipulating the number of progeny surviving, was deemed impractical, and the populations were therefore allowed to expand freely in the near-absence of biotic and abiotic mortality factors, with all life stages of each experimental population residing in their respective cage.

The Tongan flying fox that was the focus of our study is considered to be declining on some Pacific Islands (e.g. Cook Islands, Cousins and Compton 2005), and maintaining stable populations on others (e.g. Fiji, Scanlon et al. 2014), while its status remains unclear in most regions (Hamilton and Helgen 2008).

Controlled division and inheritance of peroxisomes during mitosis are further mechanisms helping to maintain stable cellular populations of this vital organelle [28], [30], [31].