Population Current Events

Population Current Events, Population News Articles.
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Can population policy lessen future climate impacts?
Population has been seemingly left out of climate change assessments, including by the Intergovernmental Panel on Climate Change. (2018-08-16)

Project to estimate the size of the lesbian, gay and bisexual community in England
Public Health England (PHE) has commissioned a health service research team from Plymouth University Peninsula Schools of Medicine and Dentistry (PUPSMD) to model the size of the LGB population in England. (2016-02-15)

Leopard coral grouper: Overexploited
Researchers measured the population stock in Saleh Bay, Indonesia of the commercially valuable leopard coral grouper (Plectropomus leopardus), a species subject to population collapse due to high fishing pressure. (2019-06-06)

Improved estimates of population extinction risk (Harding and McNamara)
An important application of theoretical ecology is in estimation of species extinction risk. Two vital parameters in extinction models are the mean population growth rate and its variance. Empirical data on population growth are rarely perfect and it has been unclear how sampling error influences extinction estimates. In Ecology Letters, January, McNamara and Harding show that sampling error has two opposite effects on estimates of population extinction risk. (2003-12-10)

Mean population size increases with diversity
Investigations of the effect of diversity on populations have resulted in few clear patterns. In a recent Ecology Letters article, relationships between community diversity and population stability in unmanipulated annual plant communities are examined. The article shows that community diversity, population size and the temporal stability of populations covaried positively which suggests abiotic factors (e.g. productivity) may govern population stability to such an extent as to override potential effects of diversity. (2003-01-28)

Huddersfield scientist helps to reveal a link in the evolutionary chain
A study of European remains suggests the foundations of the modern gene pool were laid down in Neolithic times, around 4,000-2,000 BC as a result of the rapid growth and movement of some populations. (2013-04-24)

Stroke victims at twice the risk of suicide
Stroke victims are at twice the risk of suicide, finds a study in the Journal of Epidemiology and Community Health. The increased risk remains for around five years after the stroke. (2001-11-12)

Falling blood pressure not down to drugs, say experts
Blood pressure lowering drugs were not responsible for the population decline in blood pressure seen in many countries in the mid-1980s to the mid-1990s, concludes a study published online by the BMJ today. (2006-03-09)

Are we pushing animals over the edge?
Species of mammals and birds are threatened with extinction as a result of rising human population density, according to a study published in Springer's journal, Human Ecology. The work is also the first to show that the exponential growth of the human population will continue to pose a threat to other species. In other words, there does not appear to be a threshold above which population growth would cease to have an incremental negative effect. (2013-06-19)

A new definition for old age
Age is not just the number of years one has lived, argue IIASA population researchers. A new study from the group provides a set of tools for measuring age in all its dimensions. (2013-12-12)

Immunity to the pandemic virus A (H1N1): Norway is probably well-prepared for major new outbreaks
By autumn 2009, almost half of the population of Norway had been vaccinated against the pandemic influenza A (H1N1) virus. Many had also been infected by the virus during the summer and autumn outbreaks. The majority of those who were vaccinated or were infected are expected to have developed immunity to the virus. A study of the Norwegian population's immune status to the pandemic virus in January 2010 was recently published in the journal Eurosurveillance. (2010-08-24)

At what size does a minority group become influential?
When a viewpoint is held by a minority, what size does that minority need to reach to hit a tipping point, where their view becomes widely accepted in the rest of the population? (2018-06-07)

This week in Molecular Biology and Evolution
On the road to our modern human lineage, scientists speculate there were many twist and turns, evolutionary dead ends, and population bottlenecks along the way. But how large were population sizes of common ancestors of the great apes and humans, and does the genetic analysis support the prevailing views of a great bottleneck in primate evolution? (2013-10-15)

Between extinction and survival of endangered populations
Populations of endangered species reach a critical point and therefore, efforts to predict and prevent their extinction require a thorough understanding of the underlying mechanisms. In a new study published in EPJ B, Hatem Barghathi has investigated how environmental disturbance at random times could cause strong fluctuations in the number of individuals in biological populations. They found that environmental disorder can lead to a period of slow population increase interrupted by sudden population collapses. (2017-07-12)

Movement of early humans into the Indian subcontinent
Scientists in India have used a diffusion model to study the movement and merger of early humans into and in the Indian subcontinent starting from their initial location as determined by archaeologists. They then identify locations where different groups are expected to merge, and compare this data with genetic studies of tribes from that region to show that predictions agree with genetic data. (2017-05-11)

Twins have lower risk of suicide than general population
Twins have a lower risk of suicide compared with the general population, concludes a study in this week's BMJ. (2003-08-14)

European seal plague may threaten population survival
Scientists from Sweden and the USA report in an upcoming issue of the journal Ecology Letters that the 2002 outbreak of phocine distemper virus, or PDV, in European harbour seals may reduce the population by more than half and that future outbreaks with similar characteristics could significantly increase the risk of population declines. (2002-10-30)

Buried coins key to Roman population mystery?
University of Connecticut theoretical biologist Peter Turchin and Stanford University ancient historian Walter Scheidel recently developed a new method to estimate population trends in ancient Rome and waded into an intense, ongoing debate about whether the state's population increased or declined after the first century B.C. (2009-10-05)

Orca's survival during the Ice Age
The most recent ice age may have been detrimental to the ocean's top predator, killer whales, and significantly affected diversity among living populations we see today. (2014-02-04)

Research rethinks the evolutionary importance of variability in a population
It's been long thought that variability within a population is key to population's growth and survival but new research questions that assumption. Harvard researchers found that variability can actually lower population growth in single-cell organisms. This insight is important for characterizing the fitness of a population, which is useful, for instance, in understanding how bacteria respond to antibiotics. (2017-10-04)

Brazil faces major challenges in liver transplantation
A recent analysis indicates that more than 1,700 liver transplantations are performed annually in Brazil. While Brazil performs more liver transplant surgeries than anywhere else in Latin America and is third worldwide in absolute terms, the country averages only 5 to 10 liver transplants per million population due to its increasing population and inadequate donor organ supply. (2016-08-01)

Competition with humans responsible for decline of New Zealand's endangered sea lions, study shows
Marine researchers in New Zealand have identified the direct impact of fishing as the largest known human factor in the decline of the endangered native sea lion population. The team's findings, published in Mammal Review, discount non-human factors, such as disease and identifies resource competition and by-catch incidents as the most likely causes. (2011-08-02)

How many will we be? Are population estimates off the mark?
In 2011 the Earth's population will reach 7 billion. The UN reports that the total number of people will climb to 9 billion in 2050, peak at 9.5 billion, stabilize temporarily, and then decline. Despite the confidence with which these projections are presented, the Population Council's John Bongaarts says that the trajectory is highly uncertain. If we make larger investments in family planning now, the population could be closer to 8 billion. (2011-02-20)

New discovery: Molecular variation in one gene affects the growth of natural populations
Ecologists have shown that molecular variation in one gene may affect the growth of a population in its natural habitat. Research Professor Ilkka Hanski, University of Helsinki, and Dr Ilik Saccheri, University of Liverpool, discovered that the population growth of the Glanville fritillary butterfly is affected by the allelic composition of the phosphoglucose isomerase (Pgi) enzyme. The result challenges previous views according to which allelic variation in populations, and possible consequent differences in individual performance, would be of no significance for population growth. (2006-04-26)

Brighter future for giant panda?
Scientists at Cardiff University, using a novel method to estimate population, have found that there may be many more giant pandas remaining in the wild than previously thought. (2006-06-19)

Teachers' health: Healthy heart, stressed psyche
As a result of their work, teachers suffer psychosomatic disorders such as exhaustion, fatigue, and headaches more frequently than other occupational groups. This has been shown by Klaus Scheuch et al. in a recent review article in Deutsches Ă„rzteblatt International, in which they analyze the health of teachers and the frequency of their illnesses. (2015-06-05)

As monarch butterflies journey north, gardeners can help protect species, researcher says
Low temperatures, storms and habitat destruction have all threatened the butterflies' overwintering population in Mexico. (2010-05-10)

Diabetes mortality rates in status Aboriginal adults in Alberta concerning
Diabetes rate increases in status Aboriginal adults in Alberta appear to be slowing compared with the general population, although diabetes is more common in status Aboriginals and death rates for this group are significantly higher than the general population, states an article in CMAJ (Canadian Medical Association Journal). Death rates have in fact remained unchanged for status Aboriginals who do not have diabetes. (2011-07-25)

New study explains why hotter is better for insects
Organisms have been able to adapt to environments ranging from cold polar oceans to hot thermal vents. However, University of Washington researchers have discovered a limit to the powerful forces of natural selection, at least when it comes to the adaptation of insects to cold temperatures. (2006-10-02)

Promoting walking and cycling as an alternative to using cars: what works?
What measures persuade people to shift from using cars to walking and cycling? (2004-09-30)

Is medical school only for the rich?
In their survey of first-year medical students in Canada, Irfan Dhalla and colleagues found that medical students at Canadian medical schools differ significantly from the general population in terms of ethnic background and socioeconomic status. (2002-04-15)

IIASA releases scientific study linking population growth to climate change
Slower population growth would significantly reduce climate change over the next century and increase the ability of developing countries to adapt to changing climate patterns, according to a new study from the International Institute for Applied Systems Analysis (IIASA). (2000-11-27)

First-degree relative with kidney disease increases disease risk by three-fold
In a large population-based family study, family history of kidney disease was strongly associated with increased risk of chronic kidney disease. (2021-01-12)

Population and climate change
The International Institute for Applied Systems Analysis (IIASA) and Cambridge University Press are pleased to announce the publication of Population and Climate Change by Brian C. O'Neill, F. Landis MacKellar, and Wolfgang Lutz. (2000-11-07)

Mothers' appetites can keep size of wild animal groups in check
The eating habits of mothers may be key to keeping wild animal populations steady, a study suggests. (2016-01-11)

Titanic survivors lived no longer than general population
In the closing song of the 1997 film Titanic, the heroine tells us that her heart (2003-12-18)

Lead fishing tackle may be threatening loon populations
A new study published in the Journal of Wildlife Management reveals the devastating effects of lead fishing tackle on loon populations. (2017-10-12)

New model may improve population management of species facing local extinction
By developing a new model, researchers have provided the first detailed mortality estimates for male African lions. A comparison of two populations, including the one of Cecil, exposed the signature that human impact leaves on male lion mortality. (2016-02-22)

New population data provide insight on aging, migration
A new dataset provides a comprehensive look at population dynamics in Europe, including the influence of migration on population growth and the effect of population aging. (2016-08-31)

Aboriginal Canadians at high risk for severe trauma
A new study by Shahzeer Karmali and colleagues in this issue of CMAJ shows aboriginal Canadians are at a high risk of sustaining severe trauma. (2005-04-11)

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