Sentences with phrase «isolated populations which»

Habitat loss alone may be a good predictor of extinctions of threatened and endemic species in biodiversity hotspots, but this takes no account of pervasive synergistic effects of hunting, wildfires and other anthropogenic impacts on isolated populations which may lead to much higher extinction rates compared to predictions from unqualified SAR models alone.

Not exact matches

The decision to isolate high - risk offenders system follows a government report which highlighted the dangers of leaving religious extremist prisoners as part of the general prison population.

Economic expansion in this core was associated with two other dominant trends: growth in population (the so - called demographic transition, which both facilitated, and was facilitated by, industrialization) and the geographic inclusion of previously isolated, local, and ethnic sectors of the population into the commercial and industrial labor force.

A telling characteristic of the great problems which haunt the world (our relation to nature, world population issues, the call for justice) is that these problems can not be isolated from one another.

See Appendix A. 1 for more information * There are a number of broad Australian comparative disadvantages such as high labour costs, a dispersed and geographically isolated market and small population which impact the MTP sector.

Your child will be exposed ONLY to children with his particular diagnosis, which means he will be quite isolated from the general population (this is true to some degree even if the school is eager to take your child on «outings» into the community).

According to the late Harvard University biologist Ernst W. Mayr, the greatest evolutionary theorist since Charles Darwin, «species are groups of actually or potentially interbreeding natural populations which are reproductively isolated from other such groups.»

Then there's Pailin's tragic history as the last stronghold of the Khmer Rouge, which left the population shattered, isolated, uneducated, suspicious, and devastatingly poor.

With the aim of studying the history and genetic diversity of the species, analysis was conducted on the genomes of another ten Iberian lynxes from Doñana and Sierra Morena, the only two surviving populations on the Iberian Peninsula, which have been isolated from each other for decades.

This genetic deterioration is especially marked in the Doñana population - smaller, and isolated for a longer period - which has half the genetic diversity of the Sierra Morena group.

The most famous form of this species definition may be from evolutionary biologist Ernst Mayr, who wrote in 1942: «Species are groups of actually or potentially interbreeding natural populations, which are reproductively isolated from other such groups.»

Certainly possible in Australia where there are large areas of relatively undisturbed forest with plenty of potential prey... there have been consistent sightings in the Blue Mountains area west of Sydney over many decades which suggest that rather than just an isolated zoo escapee or over grown pet there may be a breeding population, which would be a bit of a worry for us bush walkers!

Dwindling populations created a «mutational meltdown» in the genomes of the last wooly mammoths, which had survived on an isolated island until a few thousand years ago.

There are three main ideas concerning the emergence of new species (Modes of Speciation), each based on the degree to which populations undergoing this process are geographically isolated from one another (allopatric speciation, sympatric speciation, parapatric speciation).

«Since there is this high climatic zonation in the tropics and narrow thermal tolerances, there are more opportunities for populations to become divergent and isolated, which is what you need for speciation to happen,» Gill explained.

For species such as the jaguar, which rarely crosses into territory disturbed by humans, survival may hinge on the creation of habitat corridors linking isolated population pockets.

It never recovered completely — probably, the team concludes, because changes in habitat, particularly forest growth, kept populations small and isolated from the southern herds, which had less severe declines in diversity.

Scientists are concerned that butterflies with small, isolated populations may be in severe peril if their habitats are burned too frequently and in large blocks at a time, which can mean that butterfly refugia — unburned areas that provide refuge — are limited.

The scientists have resolved a dispute over whether a small population of black - headed squirrel monkeys (Saimiri vanzolinii), which are found only in an isolated part of Brazil, is a sub-species of another species or its own species.

This genetic deterioration is especially marked in the Doñana population — smaller, and isolated for a longer period — which has half the genetic diversity of the Sierra Morena group.

Extensive computer modelling aimed at reconstructing the population history of orangutans, revealed that the Batang Toru population appears to have been isolated from all other Sumatran populations for at least 10 - 20» 000 years, after which the low levels of influx of males from the northern populations had ceased.

Dr. Studer and colleagues isolated and cloned a population of neural rosette cells (R - NSCs), which have an expanded neuronal subtype differentiation potential.

Results: Phylogenetic analysis demonstrated that all hospitals from which multiple isolates were obtained have been colonized by 1 or more distinct ST1 populations.

We analyzed whole genome sequences of 1,680 Streptococcus pneumoniae isolates from four independent populations using GWAS and identified probable hotspots of genetic variation which correlate with phenotypes of resistance to essential classes of antibiotics.

The goal of this work is to determine the extent to which adaptation to different salinity regimes itself leads genetic incompatibilities versus the extent to which these genetic incompatibilities crop up subsequently after populations have become isolated.

But typically, our student body goes back to the community from which they came — generally the most isolated, underserved areas in New York — working with populations that needs them the most.

The population now stands at 125 animals and is considered an important genetic resource due to its island heritage, which kept it isolated from other breeds and forced it to adapt to adverse conditions.

Another is population viability analysis, which uses computer models to project trends in a range of conditions affecting isolated populations of a species and calculates the probability of long - time survival.

The mechanisms by which speciation occurs have been a mystery because they are generally best uncovered after populations have diverged and are reproductively isolated....

Historically, the IWC considered that Antarctic blue whales formed six «stocks,» or demographically isolated biological populations, within which internal dynamics (births and deaths) are more important than external dynamics (immigration and emigration)[6].

The inquiry noted that Indigenous people make up a high proportion of the population in regional and remote districts with around 1,200 discrete Indig enous communities of which over 1,000 were very small and very isolated communities.61 Limited commercial opportunities and viable labour markets in these communities means that they often lack some of the most basic services, including access to banking and financial services and institutions.