Sentences with phrase «occurring as populations»

Changes in migration patterns are occurring as populations become displaced due to weather - related impacts.

These changes in the domestic dynamics are a result of demographic shifts that occurred as the population began to age.

Real estate experts are predicting a housing boom will soon occur as population grows.

Not exact matches

In AFib — which affects as many as 3 % of the population, with most cases occurring in those over 65 — the electrophysiology of the heart is out of whack, and its two upper chambers (the atria) fibrillate, or quiver, instead of contracting fully.

c. Evolution occurs as natural selection favors certain traits within a population, causing some traits to become more or less common in future generations.

There are no long - term research studies on the outcome of children with Selective Mutism as they grow into adulthood, and therefore much of what we believe occurs in adulthood for this population is conjecture by experts with experience in the field.

Moyo was thus uncriticically regurgitating the old Malthusian argument about «tragedies of the commons» occurring, mostly in developing countries, with population growth and environmental factors as the cause of growing poverty and civil strife.

A summary included with the figures argues that some of this occurred in the New York City media market and served an «important dual purpose» by reaching in - state population centers as well as New Jersey and Connecticut.

Deforestation is occurring at a rapid pace as the demand for housing and goods increases with world population growth, which is expected to climb 50 percent between 1999 and 2040, according to the U.S. Census Bureau.

This should lead to tremendous advances in time - domain astronomy: studying fast - changing phenomena as they occur — black holes being born, supernovas exploding — as well as locating potentially Earth - threatening asteroids and mapping the little - understood population of objects orbiting out beyond Neptune.

The increased risk of extinction occurred because at small population sizes, as the flies spent more time being vigilant and less time eating, populations that declined could not quickly rebound.

Their claim is that the appearance of new traits in a population, generally regarded as a first step toward the evolution of new species, can occur by means other than the accumulation of micromutations (i.e., small - scale or highly localized mutations), the classic mechanism by which new traits, and eventually new species, are thought to appear.

Most adaptations in protein - coding genes occurred in the last 6,000 to 13,000 years, as human populations shifted from hunting and gathering to farming, they report.

For instance, if storms start to occur during a vulnerable time in the shrimp life cycle — such as prior to mating — this could prevent the shrimp population from bouncing back after the annual fishing season.

They've become six times more likely to occur and four times as large since the 1980s, McCoy said, due to climate and population changes.

Such a population boom, known to ecologists as overshoot, occurs when a sudden rise in a species's numbers exceeds the environment's capacity to support the increase.

Estimates show that by 2050 the world population will be more than 9 billion and this growth will occur primarily in areas of the world already experiencing food scarcity and water availability issues, as Steven Leath, plant scientist and president of Iowa State University, noted in a lecture last year at AAAS.

Nonetheless, the overall success rate in the high - risk population is over 88 percent, which the study authors consider high, although complications such as implant explantation and flap problems occur more frequently in the high - risk group than in lower - risk patients.

«The opposite will occur if populations are relatively dense and interacting, as ideas can be built on, with more chance of being conserved,» he said.

«The cicadas are probably affecting the bird populations in some way — after all, many bird populations use the cicadas as food during emergence years — but I do not think that the patterns in this study prove that the cicadas are inducing delayed bird - population changes that occur 13 or 17 years after emergence,» Marshall concludes.

While most cases of TB occur in developing countries, it is also reemerging as a threat in major urban populations in Europe, due to the increase in global travel.

If we assume that this relationship is causal, it seems likely that the same increased risk probably occurs with TBI in the civilian population as well,» said study author Deborah E. Barnes, PhD, MPH, of the University of California, San Francisco and the San Francisco Veterans Affairs Medical Center and a member of the American Academy of Neurology.

Cook adds that the short form of the gene is only one factor in the disorder, as it occurs in 16 % of the general population, while less than 0.1 % is afflicted with autism.

This finding argues against overgrazing as a possible factor for the Taimyr reindeer population decline that occurred after 2000.

By studying rare «copy number variations,» which are individual errant insertions or deletions of DNA segments (each of which occur in less than one percent of the population), researchers discovered a new cluster of genes that are affected in some autistic individuals as well as a number of mutations that were present in autistic children but not their parents.

These enter the population as exceedingly rare alternative versions of the genes in which they occur.

Even as advances in ancient - DNA technology have made it possible to probe population mixing and large - scale migrations that occurred thousands of years ago, researchers have had trouble studying the genetic history of the Near East because the region's warm climate has degraded much of the DNA in unearthed bones.

Furthermore, the researchers were able to see that the speciation process that occur in many lakes — namely that whitefish populations diverge into large - bodied and small - bodied species, had not developed as far in Hotagen.

By careful measurements of the population of two species on one tiny island over the course of major weather changes such as El Niño events and droughts, the Grants were able to show that evolutionary changes in beak size and body size can occur in as little as a couple of years.

Stress has been thought to be a contributing factor to the development of metabolic syndrome, which occurs about twice as often in patients with PTSD than in the general population.

All adverse neonatal outcomes were at least twice as likely to occur, compared with the general population.

The analysis also revealed a «genetic bottleneck» in Western dogs — a reduction in genetic diversity typically tied to a sharp decline in a population's numbers, as can occur when a small band of individuals splits off from the main group.

But around the densely populated capital city and airport, adaptation has already occurred as land claim is a common practice in order to relive population pressure.

Using a software program called BOTTLENECK, the two searched for the signature of bottlenecks or founder effects in each population to see if the loss of diversity occurred suddenly or gradually as adjacent populations moved farther from Africa.

Also, he points out, if there is a huge population of stars outside galaxies, we should see a noticeable number of supernovas occurring out in the middle of nowhere as those rogues stars die.

Work has also been done to identify potential natural enemies that might regulate populations of harlequin ladybirds, such as the wasp parasite Dinocampus coccinellae which occurs worldwide and uses most types of ladybirds as a host.

High ozone concentrations typically occur outside of the cities and represent a risk factor for the health of rural population as well as for agricultural production.

The researchers are looking at the growing population of adults with heart defects to determine which defects are associated with the highest rates of infection as well as serious complications or death when an infection occurs.

The health literature confirming the links between radon and health include studies of many uranium mining populations, as well as other mining districts and mineralized areas with high levels of naturally occurring radiation sources.

Snow leopards function as a keystone species — although they occur in relatively low abundance, snow leopards play a critical role in regulating the populations of other species, preventing any one species from dominating the habitat.

Using data on population abundance, trends, and threats, the team of scientists determined that the monarch butterfly species as a whole is apparently secure, but the subspecies occurring in North America is vulnerable to extinction.

The study shows that when the cod population in the central Baltic increases, it spreads into larger areas and spills over into adjacent marginal systems where it usually does not occur, as for example the Gulf of Riga.

Thus dispersal is more likely to have occurred when the Basins were completely filled with water, as there would have been limited space for the hominin populations on the tree covered Rift shoulders and river flood plains [34].

Populations of some aphids, caterpillars, mites, and other invertebrates are sometimes drastically reduced by naturally occurring pathogens, usually under conditions such as prolonged high humidity or dense pest pPopulations of some aphids, caterpillars, mites, and other invertebrates are sometimes drastically reduced by naturally occurring pathogens, usually under conditions such as prolonged high humidity or dense pest populationspopulations.

Cannell and his co-authors consider vitamin D to be perfectly safe for most people in amounts up to 10,000 IU per day — even while simultaneously recommending people avoid supplementing with vitamin A. 1 In reality, however, these amounts of vitamin D could be dangerous when combined with low intakes of vitamins A and K2 as occurs in the general population.

The change in lifestyle of several North American aboriginal populations occurred as recently as the late 1800s, and the numerous ensuing health problems were extensively documented (3 — 5).

An out - of - the - ordinary zombie (named R) feels the need to protect a human named Julie, and as they develop their relationship changes occur within R as well as the zombie population causing conflict and fighting between the two groups.

Yet, just as their zombie filming is getting started, a real zombie outbreak occurs, turning the school's population into the walking dead.

Initially, the decision during the late 1970s by the ruling Communist Party to set a baby quota for each couple was meant to counter the population boom that had occurred following the nation's official independence as the People's Republic of China in 1949.

In Section 2331 of Chapter 113 (A), defines terrorism as activities that: involve violent acts or acts dangerous to human life that are a violation of the criminal laws of the United States or of any State, or that would be a criminal violation if committed within the jurisdiction of the United States or of any State; (B) ``... activities that involve violent... or life - threatening acts... that are a violation of the criminal laws of the United States or of any State and... appear to be intended (i) to intimidate or coerce a civilian population; (ii) to influence the policy of a government by intimidation or coercion; or (iii) to affect the conduct of a government by mass destruction, assassination, or kidnapping; and... (C) occur primarily within the territorial jurisdiction of the United States...» (10) Subsequently paper will go deeper in counter-terrorism legislation of US.