Sentences with phrase «of large human populations»

A study of how a monetary system can change behavior finds that filthy lucre may have been crucial for the evolution of large human populations.

And in what might prove an enduring lesson in conservation, paleoecologists have shown that 20 out of 21 large mammals in India — from leopards to muntjac deer — have survived there for the past 100,000 years alongside one of the largest human populations on the planet.

The Channel Islands National Marine Sanctuary is recognized regularly as an ecologically significant place with tremendous biodiversity, but which is also in close proximity to the greater Los Angeles area - one of the largest human population centers in the country.

Not exact matches

Did the godless communists like Stalin an Mao kill a larger percentage of the human population than the Christian crusaders?

Last time I checked the largest population of humans are in Asia and by a large margin.

Indonesia has the largest Muslim population and it has experienced productive and peaceful times in the decade since the Bali Bombings, actively committed to redressing a long history of human rights abuse and repairing once - frayed bonds with modern neighbors like Australia and New Zealand.

In fact, the largest group, Christians, make up less than 1/3 of the human population.

For example, in addition to having higher levels of genetic diversity, populations in Africa tend to have lower amounts of linkage disequilibrium than do populations outside Africa, partly because of the larger size of human populations in Africa over the course of human history and partly because the number of modern humans who left Africa to colonize the rest of the world appears to have been relatively low (Gabriel et al. 2002).

fred The Bible said that at a time when the world's human population was only in the millions, and disease generally prevented about 30 % of all children from reaching adulthood, so having large families was a way of hedging your bet.

The same organization of the world for maximum production that is destroying the capacity of the Earth to sustain a large human population is also destroying all natural systems of human relationships.

Wow, what a prophecy you have there, that humans acquire knowledge over time, and that acquisition of knowledge accelerates when we have a larger population.

In general, our ruling class no longer believes in those divine decrees of which human decrees are but a hint or shadow, and neither does a large and growing part of the population.

When comparing human and veterinary use of antibiotics, it failed to acknowledge the vastly different population sizes as well as the fact that livestock such as cattle and pigs weigh more than people and thus will require a larger volume of antibiotic to treat an infection than a person will.

It also witnessed large - scale societal and attitudinal changes, including the creation of a brilliantly vibrant civil society encompassing human rights groups, environmentalists, indigenous populations and religious interests, active and often strident in pursuit of their societal aims.

«Our work demonstrates that the generation of genome sequences from a large number of archaic human individuals is now technically feasible, and opens the possibility to study Neandertal populations across their temporal and geographical range,» says Janet Kelso, the senior author of the new study.

Analysing the ways that mitochondrial DNA sequences differ across a large number of living people has helped to establish prehistoric population trends, but this record stretches back only 200,000 years to the point where all humans alive today shared a common female ancestor.

So far they have mapped the natural geologic stresses throughout Oklahoma and Texas — the states with the largest populations at risk from human - induced quakes — and have discovered that only a fraction of faults hold the potential to slip in the presence of moderate pressure increases.

If they were hunting horses on foot, they would have quickly depleted bands of horses in the vicinity of the villages and would have had to go farther afield to hunt — it wouldn't have been feasible or supported that large human population.»

Ten thousand years ago, at the dawn of the Neolithic era, the agricultural revolution began to yield vastly larger amounts of food from cultivated crops and livestock, allowing rapid growth in human populations.

Instead, intensification — producing more yield per unit of existing farmland — using advanced farming technologies and high - yielding varieties of crops offers a more promising route to feeding a larger and more prosperous human population.

Despite countless findings to the contrary, a large portion of the population doesn't believe that scientists agree on the existence of human - caused climate change, which affects their willingness to seek a solution to the problem, according to a 2011 study in Nature Climate Change.

But these poisons can neither be deployed effectively on islands with large human populations nor where residents disapprove of their use.

in the May issue claims that biologists say the concept of race is biologically meaningless, presumably because «any large human population has about 85 percent as much genetic variation as the species as a whole.»

The elk population in Yellowstone is at the mercy of a much larger, human - altered ecosystem.

When the worms were healthy, they housed a large population of Bacteroides — a group of helpful, supportive, symbiotic bacteria — and a smaller population of Proteobacteria — a group that contains a number of dangerous human pathogens.

How it works: To measure the way malaria is transmitted, the computers simulate large human populations, varying biological and social parameters that influence the distribution of the disease.

«Large - scale conservation strategies such as Panthera's Jaguar Corridor Initiative, which are instrumental to protect broadly distributed species such as jaguars, maintain their connectivity, and by doing so to ensure their long - term survival, need to incorporate genetic monitoring of wild populations to fully understand how these species respond to environmental changes and increasing levels of human impacts,» Wultsch said.

Conducting the first large - scale, genome - wide analyses of ancient human remains from the Near East, an international team led by Harvard Medical School has illuminated the genetic identities and population dynamics of the world's first farmers.

Writing in a linked Comment, Dr Abraham Goorhuis and Professor Martin P Grobusch, Center of Tropical Medicine and Travel Medicine, University of Amsterdam, Amsterdam, Netherlands say: «An important prerequisite for the occurrence of large - scale epidemics is the presence of an immunologically naive human population.

The Human Genome Diversity Project will never «resolve for us the nature of the large - scale relationships among populations», Marks argues, simply because the genetic diversity it documents springs largely from the messy and convoluted histories of continuously intermingling populations.

The timing of this decline correlates with environmental changes associated with the onset of the last glacial cycle, the team reports, whereas archaeological evidence does not support the presence of large populations of humans in eastern Beringia until more than 15,000 years later.

He found higher rates of nest predation in small woodlots near human communities because these areas had higher populations of raccoons (Procyon lotor) and squirrels (Sciurus spp.) and few, if any, large predators, such as cougars and bobcats (Lynx rufus).

As early as 700 B.C., Chinese authorities were encouraging peasant farmers to move into remote regions of the plateau, citing the need to feed a large and growing population while establishing a buffer of human settlement against the threat of nomadic invaders along its northern border.

If the Neanderthals didn't lose out because of their inferior social skills, maybe they interbred with modern humans and simply disappeared into the larger population.

«If, due to human influence, a large fraction of the [insect] migrant population is wiped out, it might have catastrophic consequences for those particular ecosystems.»

He thinks this work will inspire other researchers with large databases of data on humans to look at how selection operates in populations.

Perhaps H. sapiens evolved out of ancestral human populations that inhabited this larger region encompassing Africa and the Arabian Peninsula.

Nevertheless, the need for historical language comparison is still vital: «In large parts of the world, like in New Guinea or South America, both the languages and the history of the human populations speaking them still remain crudely understudied,» says List.

These differences suggest that the ancestral population of apes that gave rise to humans, chimps, and bonobos was quite large and diverse genetically — numbering about 27,000 breeding individuals.

More recently, improved gene - sequencing technology and larger population studies have made it possible to detect gene variants that appear in only 1 percent of the human population.

Previous research suggests our ability to cooperate and exhibit empathy — both thought to be critical to human success — relied in part on the large brains of our hominin ancestors, relative to body size; and that selection against aggression within early human populations allowed us to thrive.

«It is [still] possible that a population of wolves remained relatively untamed but tracked human groups to a large degree, for a long time,» adds first author of the study Pontus Skoglund of Harvard Medical School and the Broad Institute.

He adds, «It's inevitable that there has been some accumulation of deleterious mutations that would have been purged had [humans and chimpanzees] had larger population sizes.»

However, in the southwestern Amazon — which hosted large pre-Columbian populations — about 30 % of the distribution of domesticated species stemmed from human activities.

But with no evidence of a large asymptomatic population so far, Kellam and his colleagues favor a second scenario: MERS evolved and diversified in animals and then infected humans on multiple occasions.

With the recent publication of a large data set of 763 microsatellite markers — short stretches of DNA that are repeated in the genome — from 53 populations in the Human Genome Diversity Project, evolutionary geneticists William Amos and Joe Hoffman of the University of Cambridge in the United Kingdom had enough genomic data to test both models.

Developing therapeutic cell populations from human ES cells will be far more demanding: cells will have to be stable, predictable, pure, have proven functionality, be nontumor - forming, and be «scalable» — capable of growing in very large numbers.

To have any hope of slowing the pace and holding down the upper level temperatures that global warming will bring over this century, the human population of the world will need to make large reductions of the additional billions of tons of greenhouse gases they are projected to be pumping into the atmosphere, each year.

In large organisms with relatively small population sizes, such as humans, only in the order of 1 % of the genomic information is shaped by the environment via natural selection.

Studying the severe drought in São Paulo, the largest city in South America with a population of about 20 million, a team led by Friederike Otto found that human - induced climate change was not a major influence.