Sentences with phrase «in population size»

These shifts matched up with the fluctuations in population size.

This cold snap would have made life difficult for our African ancestors, and the genetic evidence points to a sharp reduction in population size around this time.

And this was usually a sharp decline in population size.

Often, the data were noisy; there could be lots of ups and downs in population sizes, not always with good explanations for what happened.

We estimate that the 1 °C increase in the Ottawa temperature is equivalent to an increase in population size of ~ 400,000.

Ensuring continuity — and that each district varied in population size by only 0.1 % — was relatively straightforward.

He also shows how these are moulded by geological history and factors such as the fluctuations in population size of lynx and hares, and the frequency of forest fires.

The recent trends in population size were gained using complete mitochondrial genome sequences of of 41 passenger pigeons (three of which date to 4,000 years old).

«You see a rapid increase in population size from about 18,000 years ago, just as the climate began warming up after the last Ice Age,» says lead author Rebecca Dew.

China is the fourth largest country in terms of geographical size and the largest in population size.

Rather optimistically, Price even argues that differences in population size alone account for «mighty minnows» outperforming the big five (UK, Italy, Germany, France and Spain) between 1997 and 2007.

Common Cause, another good government group, split from Dadey's plan and suggested leaving LATFOR but leashing it: currently districts can vary in population size up to 10 %, which would get knocked down to 6 %, «communities of interest» like Italians in Bay Ridge and Bensonhurst should be respected and kept whole where possible, and the commission would be prohibited from considering incumbent residence and political enrollment.

While the districts may be humorous to look at and vary greatly in their population size, the impact has been devastating on our democracy.

The report argues that New York State allows «gerrymandered» districts with vast disparities in population size that, while technically legal, undermine democratic principles.

A new report, issued by the New York Public Interest Research Group and other reformers, documented how the 2013 deal undermined the democratic principle of «one person, one vote» by allowing legislative districts that vary substantially in population size.

As the petition asserted, «the giraffe has suffered a major reduction in population size across its range primarily due to habitat loss, commercial overutilization, and severe poaching, and such decline continues unabated.»

They found that domestication may have led to a rise in the number of harmful genetic changes in dogs, likely as a result of temporary reductions in population size known as bottlenecks.

This study predicts that, for most colonies, the length of the parents» trips to get food will soon exceed the resistance to starvation of their offspring, leading to massive King penguin crashes in population size, or, hopefully, relocation.

The increase in population size also seems to have levelled off in the Turku region, whereas the breeding population continues to grow outside large urban areas both in the coastal archipelago and on inland lakes.

The paper maps passenger pigeon genetic data to a published genome from the Rock dove, Columba livia, and uses these data to infer changes in their population size through time.

As a result, understanding changes in population size for social species — several of which, such as African wild dogs and southern resident killer whales, are endangered — requires understanding of what goes on within groups and how individuals fare when they strike out on their own.

Natoli, for example, reported a 16 — 32 percent decrease in population size over a 10 - year period across 103 colonies in Rome — despite a 21 percent rate of «cat immigration.»

A decline in population size implies rapid population aging and a size of the labor force that declines — in the short term — more rapidly than the overall population size.

The challenges that the world faces in the next decades regarding climate change will likely have to be addressed by changing consumption patterns and technological innovations; changes in population size in the most developed countries, with the possible exception of the United States, is a relatively slow process that occurs over many decades and that will unlikely to have a significant impact on how the world resolves the challenges of climate change and resource constraints.

A paper released yesterday showed a 25 - 50 % decline in population size took place between 2004 and 2006 (larger than previously calculated).

Casual observers are unlikely to notice an obvious drop in monarch numbers this spring, in part because of the natural variability in population size from year to year.

In Argentina, there have been other initiatives of eco buses with engines running on hybrid hydrogen (gas and water) in the city of Rosario, located in Santa Fe province (the country's third city in population size).

It is the fifth largest town in South Carolina, and has consistently grown in population, literally doubling in population size between 1990 and 2000.

Although some biologists have argued for the power of inbreeding, a persuasive argument of late, he says, has been that climatic events and random fluctuations in population size are far more important in the wild.

Robertson, G. et al (2014) Long - term trends in the population size and breeding success of emperor penguins at the Taylor Glacier colony, Antarctica.

Scientists have previously observed extreme reductions in sperm quality for each of these big cats — all of which also suffered huge reductions in population size that led to inbreeding.

According to the National Churches Trust, the rate of church closures in Wales is relatively higher than in England which differences in population size are taken into consideration.

Hunter - gatherers were replaced in many places by sedentary farmers, and there were large increases in population size that laid the foundation for larger towns and eventually complex societies.

42 %: terrestrial animal and plant species with known trends that have declined in population size the last decade

The more innovative studies (e.g., [13,14]-RRB- try to tackle the many potential confounding factors clouding the signal of selection, such as demographic effects (i.e., changes in population size and the influence of migration).

The five places with the most expensive motorcycle insurance rates in North Carolina were scattered across the state and varied in population size.

«What happened here was most likely an increase in population size, with increasing fecundity, and higher levels of mobility and gene flow so that, over time, Neolithic Near Eastern villages became more cosmopolitan, and this eventually triggered expansion into Europe.»

Hidden in the patterns of genome variation are signals that indicate large cyclical fluctuations in population size that mirror historical patterns of glaciation.

The lack of genetic differences in Namibian elephants could also be attributed to their long distance migrations; large home ranges; recent increases in population size and range; or gene flow provided by male elephants breeding with different groups of female elephants.

In ecology, we have the analogy that we have competition and predation and all these other things going on, but we also have random fluctuations in population size.

A major reason for this is that density - dependent feedback effects caused by fluctuations in population size are considered independent of stochastic variation in the environment.

In addition, socialized cats and kittens are spayed / neutered and then often put up for adoption, causing an immediate reduction in the population size.

IMO we will be forced down in population size and consumption, but its too far in the future to really know what will happen, and what novel science and recycling discoveries will be made.

Demographic projections depict future trends in population size and its distribution by age and sex.