Population Growth Current Events | Population Growth News
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Improved estimates of population extinction risk (Harding and McNamara)
An important application of theoretical ecology is in estimation of species extinction risk. Extinction models guide the selection of management regimes for endangered species. Two vital parameters in these models are the mean population growth rate and its variance. However, empirical data on population growth are rarely perfect, but are... view more... (2003-12-10)
Insect population growth likely accelerated by warmer climate
Insects have proven to be highly adaptable organisms, able through evolution to cope with a variety of environmental changes, including relatively recent changes in the world's climate. But like something out of a scary Halloween tale, new University of Washington research suggests insects' ability to adapt to warmer temperatures carries an... view more... (2006-10-31)
New discovery: Molecular variation in one gene affects the growth of natural populations
For the first time, ecologists have been able to show that molecular variation in one gene may affect the growth of a population in its natural habitat. view more (2006-04-26)
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. view more (2006-10-03)
UK Study Suggests Possible Link Between Colorectal Cancer And Human Growth Hormone Therapy (p 273)
Authors of an observational study in this week's issue of THE LANCET highlight a possible link between human growth hormone therapy and an increased risk of colorectal cancer. The investigators comment that further evidence is required before firm conclusions can be made, and stress that there is no evidence from their study as to whether there is... view more... (2002-07-24)
Environmental effects on genetic adaptation and population dynamics
It seems intuitive that genes are affected by selection as a result of environment. In fact there is little evidence thus far that such genetic effects impact year-to-year population dynamics. view more (2006-04-25)
What caused westward expansion in the United States?
Western Expansion during the nineteenth century was an important determinant of geographic distribution and economic activity in the United States today. However, while explanations abound for why the migration occurred- from the low price of land to a pioneering spirit - little empirical work has been done to determine which specific market... view more... (2008-02-29)
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. view more (2009-10-06)
Big and fast growing infants at greater risk of later obesity
Large infants, and those who grow rapidly during the first two years of life, are at increased risk of obesity in childhood and adulthood, a study published online by the BMJ today (14 October 2005) has found. view more (2005-10-14)
The future of tropical forests
Deforestation and habitat loss are expected to lead to an extinction crisis among tropical forest species. Humans in rural settings contribute most to deforestation of extant tropical forests. view more (2006-04-07)
Study shows new method of growth hormone dosing improves height
A randomized UCLA study found that a new dosing paradigm can improve height outcomes in the treatment of children who have short stature due to growth hormone deficiency and idiopathic short stature. view more (2005-06-07)
Study demonstrates how gene variant may contribute to cancer development
A relatively common cancer susceptibility gene appears to be frequently acquired in metastatic lesions from colorectal cancer, and give cancer cells a growth advantage, according to a study in the October 5 issue of JAMA. view more (2005-10-05)
Family planning a major environmental impact
Some people who are serious about wanting to reduce their "carbon footprint" on the Earth have one choice available to them that may yield a large long-term benefit - have one less child. view more (2009-08-03)
Major Study Into How A Child's Development Is Influenced By Diet In Infancy
Researchers at the University of Southampton are embarking on a four-year investigation into how diet in the first year of life influences growth and development. The study, which is being funded by a £340,000 award from the Food Standards Agency, is led by Dr Sian Robinson of the Medical Research Council Environmental Epidemiology Unit at... view more... (2004-04-16)
Intensive youth soccer participation leads to growth deformations
In this study, 550 Belgian young soccer players were medically examined in different soccer teams at different competitive levels. The observed growth deformations in this study are situated at the knee joint, were an non-symmetrical growth was found. This non-symmetrical growth leads to the so-called 'bowlegs'. This growth deformation is... view more... (2002-06-11)
Unexpected growth in atmospheric CO2
A team of scientists has found that atmospheric carbon dioxide (CO2) growth has increased 35 percent faster than expected since 2000. The findings are published this week in the journal Proceedings of the National Academy of Sciences (PNAS). view more (2007-10-23)
Model helps explore patterns of urban sprawl and implicaitons for quality of life
Americans like living in cities, and according to statistics in the United Nations World Population Database so do an increasing number of people throughout the world. view more (2007-02-20)
Global poverty is still a priority
Of the six billion people sharing our planet, almost half live under the poverty line of $US2 per day. Though growth predictions vary it is likely that, by 2020, the population will increase by approximately another 1.2 billion, of which some 95% will live in developing countries. Such figures highlight the need to address the issues surrounding... view more... (2009-03-18)
Why have sex? The answer is not as simple as we thought.
Theories abound as to why organisms favour sexual reproduction, but testing these has been notoriously difficult. A common view is that sexual reproduction helps to reduce the effects of damaging mutations within a population. Now researchers from the Rockefeller University have tested this premise, using careful measurements of bacterial... view more... (2003-05-28)
Fears raised over link between human growth hormone and CJD
Further cases of Creutzfeldt-Jakob (CJD) disease could arise as a result of human growth hormone treatment, even after low doses, suggests research in the Journal of Neurology Neurosurgery and Psychiatry. view more (2002-05-20)
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