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Decline in Biological News

Birds in Flint Hills of Kansas, Oklahoma face population decline despite large habitat

The wide-open spaces of the Flint Hills may no longer provide a secure home on the range for several familiar grassland birds, according to research by a Kansas State University ecologist and her colleagues. The researchers found that three bird species common to the Flint Hills region of Kansa...

Lake Michigan fish populations threatened by decline of tiny creature

The quick decline of a tiny shrimp-like species, known scientifically as Diporeia , is related to the aggressive population growth of non-native quagga mussels in the Great Lakes, say NOAA scientists. As invasive mussel numbers increase, food sources for Diporeia and many aquatic species have s...

Shark attacks decline worldwide in midst of economic recession

GAINESVILLE, Fla. The recession may be responsible for a slump of a different sort: an unexpected dive in shark attacks, says a University of Florida researcher. Shark attacks worldwide in 2008 dipped to their lowest level in five years, a sign that Americans may be forgoing vacation trips to ...

Historical photographs expose decline in Florida's reef fish, new Scripps study finds

A unique study by a scientist at Scripps Institution of Oceanography at UC San Diego has provided fresh evidence of fishing's impact on marine ecosystems. Scripps Oceanography graduate student researcher Loren McClenachan accessed archival photographs spanning more than five decades to analyze and...

Pollinator decline not reducing crop yields just yet

The well-documented worldwide decline in the number of bees and other pollinators is not, at this stage, limiting global crop yields, according to the results of an international study published in the latest edition of the respected science journal, Current Biology . Co-author, CSIRO Entomolo...

Vitamin K does not stem BMD decline in postmenopausal women with osteopenia

In a randomized controlled trial called the "Evaluate the Clinical use of vitamin K Supplementation in Postmenopausal Women with Osteopenia" (ECKO) trial, Angela Cheung and colleagues at the University of Toronto found that a high dose daily vitamin K1 supplement did not protect against age-relate...

In scientific first, Einstein researchers correct decline in organ function associated with old age

(BRONX, NY) As people age, their cells become less efficient at getting rid of damaged protein resulting in a buildup of toxic material that is especially pronounced in Alzheimer's, Parkinson's disease, and other neurodegenerative disorders. Now, for the first time, scientists at the Albert ...

River damming leads to dramatic decline in native fish numbers

Damming of the Colorado River over the last century, alongside introduction of game fish species, has led to an extensive decline in numbers of native fish whilst introduced species have flourished. Scientists have found that physical changes which occur to a river when it is dammed have had an a...

Understanding autumn rain decline in SE Australia

According to a report from a CSIRO Wealth From Oceans Flagship study published this week in the science journal Geophysical Research Letters since 1950 Victoria has suffered a 40 per cent decline in autumn rainfall (March to May) compared to the average recorded between 196190. The reports au...

NOAA reports coastal waters show decline in contaminants

NOAA scientists today released a 20-year study showing that environmental laws enacted in the 1970s are having a positive effect on reducing overall contaminant levels in coastal waters of the U.S. However, the report points to continuing concerns with elevated levels of metals and organic contam...

Changes in ocean conditions in Sargasso Sea potential cause for decline in eel fishery

American eels are fast disappearing from restaurant menus as stocks have declined sharply across the North Atlantic. While the reasons for the eel decline remain as mysterious as its long migrations, a recent study by a NOAA scientist and colleagues in Japan and the United Kingdom says shifts in o...

No convincing evidence for decline in tropical forests

Claims that tropical forests are declining cannot be backed up by hard evidence, according to new research from the University of Leeds. This major challenge to conventional thinking is the surprising finding of a study published today in the Proceedings of the US National Academy of Sciences b...

Films of Mitchell and Kenyon illuminate lefties' decline in Victorian England

By mining evidence from the classic films made by Mitchell and Kenyon, researchers have confirmed that the left-handed minority suffered something of a setback in Victorian England, at the beginning of the 20th century. In more recent times, lefties' numbers quickly rose again, the researchers rep...

A 'heart healthy' diet and ongoing, moderate physical activity may protect against cognitive decline

Vienna, July 14, 2009 Eating a "heart healthy" diet and maintaining or increasing participation in moderate physical activity may help preserve our memory and thinking abilities as we age, according to new research reported today at the Alzheimer's Association 2009 International Conference on Alz...

Results from trials of DHA in Alzheimer's disease and age-related cognitive decline

Vienna, July 12, 2009 Results from two large studies using DHA, an omega 3 fatty acid, were reported today at the Alzheimer's Association 2009 International Conference on Alzheimer's Disease (ICAD 2009) in Vienna. One of the trials was conducted by the Alzheimer's Disease Cooperative Study (A...

First ever worldwide census analysis of caribou/reindeer numbers reveals dramatic decline

Caribou and reindeer numbers worldwide have plunged almost 60% in the last three decades. The dramatic revelation came out of the first ever comprehensive census analysis of this iconic species carried out by biologists at the University of Alberta. The results have recently been published i...

In a last 'stronghold' for endangered chimpanzees, survey finds drastic decline

In a population survey of West African chimpanzees living in Cte d'Ivoire, researchers estimate that this endangered subspecies has dropped in numbers by a whopping 90 percent since the last survey was conducted 18 years ago. The few remaining chimpanzees are now highly fragmented, with only one v...

Gene expression patterns predict rapid decline in idiopathic pulmonary fibrosis patients

Idiopathic pulmonary fibrosis (IPF) is a chronic lung disease typically characterized by the slow but progressive onset of shortness of breath or cough. Most patients live about five years after diagnosis. However, according to a new study being published today in the online journal PLoS ONE, a su...

Pitt study notes decline in male births in the US and Japan

A study published in this week’s online edition of Environmental Health Perspectives reports that during the past thirty years, the number of male births has decreased each year in the U.S. and Japan. In a review of all births in both countries, the University of Pittsburgh-led study found signific...

Individual differences in a clock gene predict decline of performance during sleep deprivation

People are known to differ markedly in their response to sleep deprivation, but the biological underpinnings of these differences have remained difficult to identify. Researchers have now found that a genetic difference in a so-called clock gene, PERIOD3, makes some people particularly sensitive to...

Climate change creates dramatic decline in red-winged black bird population

Global warming strikes again. A University of Illinois researcher reports that a red-winged black bird population in Ontario, Canada has decreased by 50 percent since 1972. The decrease is related to a positive shift in the North Atlantic Oscillation which has resulted in warmer, wetter winters in ...

Steep oxygen decline halted first land colonization by Earth's sea creatures

Vertebrate creatures first began moving from the world's oceans to land about 415 million years ago, then all but disappeared by 360 million years ago. The fossil record contains few examples of animals with backbones for the next 15 million years, and then suddenly vertebrates show up again, this ...

Alarming decline in Nepal's rhinos and tigers in former Maoist stronghold

Washington ?Results released today by World Wildlife Fund of the first assessment done in two years in one of Nepal's premier national parks reveal an alarming decline in tiger and rhino populations, indicating widespread poaching. The area only became accessible for visits since the ceasefire betw...

Acid rain causing decline in sugar maples, say researchers

Acid rain, the environmental consequence of burning fossil fuels, running factories and driving cars, has altered soils and reduced the number of sugar maple trees growing in the Northeast, according to a new study led by Cornell University researchers. The sugar maple is the most economically v...

Alaska seal pup diet may hold key to decline of population

Female harbor seal pups whose blubber falls below average levels may be at higher risk of delayed sexual maturation or death, even if they get enough fat in their diets later on, according to a new study sponsored by The American Physiological Society and presented at Experimental Biology 2006. T...

HIV decline in Zimbabwe linked to behavioural change

An international research team believes that changes in behaviour among the population have accelerated the recent decline in HIV infection in Eastern Zimbabwe. Research published today in Science shows how there has been an almost 50 percent decline in HIV prevalence in some groups, which the re...

Contaminants linked to sturgeon decline in Columbia river

White sturgeon populations in the Columbia River may be declining due to the presence of elevated amounts of foreign chemicals including DDT and polychlorinated biphenyls in their bodies, according to new studies by researchers at Oregon State University. The research by Carl Schreck and Grant F...

Horseshoe crab decline threatens shorebird species

Each year, the red knot, a medium-sized shorebird, makes a 20,000-mile round-trip from the southern tip of Argentina to the Artic Circle ?one of the longest migrations of any bird. And each year from April to June, the red knot stops over in the Delaware Bay to feed on horseshoe crab eggs resulting...

Alzheimer's cognitive decline slowed

PET scans and cognitive tests have suggested that Alzheimer's disease patients with genetically modified tissue inserted directly into their brains show a reduction in the rate of cognitive decline and increased metabolic activity in the brain, according to a study published in the April 24, 2005 o...

Urban water ecology at the ESA annual meeting

...ae, however, breathe air at the water's surface through a specialized siphon. Chaves says that this combination of an increase in food and a potential decline in predators could be the key to these mosquitoes' success. Larger mosquitoes tend to result from a longer lifespan, which is dangerous because it g...

Reducing risk of hospitalization in the elderly

...e dollars, it may also save lives. Numerous studies show that even short stays in the hospital are associated with a greater future risk of functional decline and disability. "Most methods of measuring muscle mass or density rely on complex imaging procedures, such as using quantitative computed tomograp...

Large trees declining in Yosemite

...ington scientists compared the earliest records of large-diameter trees densities from 1932� to the most recent records from 1988�. A decline in large trees means habitat loss and possible reduction in species such as spotted owls, mosses, orchids and fishers (a carnivore related to weasels)...

Humans 'damaging the oceans'

...more tipping points are passed and the oceans go down the sort of spiral of decline we have seen in the world's tropical forests and rangelands, for example." ...es by the end of this century." Scientists expect ocean oxygen levels to decline by about six per cent for every one degree increase in temperature and area...

Test helps in fight against lung infections and for treating other life-threatening infections

...was receiving intravenous antibiotics for a lung infection but continued to decline in health and lung function. The same antibiotics had been used for an ear...st, and was receiving oral and inhaled antibiotics, but showed a continuous decline in health and lung function. The doctors admitted the patient to hospital ...

Biologists rediscover endangered frog population

...epartment of Fish and Game to restore frog habitat renews hope of survival for this Southern California amphibian. Globally, amphibians are on the decline because of habitat loss, effects of climate change and the spread of a deadly pathogen called the chytrid fungus. The mountain yellow-legged frog is o...

121 breeding tigers estimated to be found in Nepal

...of poaching and habitat loss across their range. The main reason for the decline of tiger populations has been attributed to poaching and illegal trade. Thi...communities have been reported. Other important reasons of tiger population decline are habitat shrinkage and fragmentation due to human intervention, loss/dec...

Scientists track impact of DNA damage in the developing brain

...s a mouse whose nervous system lacked Xrcc1 and so was unable to efficiently repair the single-strand DNA damage. The shutdown triggered a dramatic decline of interneurons throughout the cerebellum. In a subgroup of those cells, the damage triggered apoptosis, or programmed cell death. But the findings su...

Humans lend a hand to critically endangered waterbird

...tion experts explores the exact reasons behind the decline of the critically endangered white-shouldered ibis...white-shouldered ibis has undergone the most rapid decline of all South-East Asia's large waterbirds and is n...a, the precise causes behind the bird's continuing decline have until now been poorly understood, which has h...

High construction cost for cycads

...tial leaf construction investments by delaying the decline in food synthesis capacity that accompanies the le...ne month after leaf construction. In contrast, the decline in food synthesis for leaves of Guam's Cycas is ...al maximum. Marler indicates this sluggish pace of decline is 65-80 times slower than other species for which...

Warming climate threatens California fruit and nut production

...earch team noted that growers may be able change some orchard management practices involving planting density, pruning and irrigation to alleviate the decline in winter chill. Another option would be transitioning to different tree species or varieties that do not demand as much winter chill. There are al...
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