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Tag: "forest" at biology news

Study finds mercury prevalent in many western fish

...ing of heavy oils and other fossil fuels, and even forest fires. In the survey, the researchers did find 13 fish from eight different sites that had very high mercury concentrations ?levels of 1.0 microgram or higher ?likely indicating a point source. These high levels could be caused by nearby mines, du...

Cellulose nanocrystal research could lead to new vaccines, computer inks

... The assistant professor in the wood science and forest products department of the College of Natural Resources at Virginia Tech will be delivering her findings at the American Chemical Society 233rd National Meeting and Exposition in Chicago on March 25-29. The focus of her research deals with cellulose ...

Immunization rates hit record high in poor countries

...y for a fungal colony, pumping spores out into the forest long after the spraying teams have gone home. I...he tree for fiber and construction, and commercial forest owners have something to lose with the demise of the hemlock. But far more important, as the hemlock...

Fungal factories may save hemlock forests

...y for a fungal colony, pumping spores out into the forest long after the spraying teams have gone home. I...he tree for fiber and construction, and commercial forest owners have something to lose with the demise of the hemlock. But far more important, as the hemlock...

Cities change the songs of birds

...pared these songs to those of great tits in nearby forest sites. The results of the comparison showed that f... urban songs were shorter and sung faster than the forest songs. The urban songs also showed an upshift in frequency that is consistent with the need to compe...

New bird discovered on unexplored Columbian mountain

... last year by the Colombian government and a large forest nature reserve was recently established in the region by Fundación ProAves, Colombia's bird conservation NGO. "The description of a new bird is a rare event in modern times," said Blanca Huertas. "However, this is just the first of several new sp...

A buffet for early human relatives

...ch include fruit and leaves from trees in both the forest and savanna, and C4 plants, which grow mostly on the savanna and include potato-like tubers, grasses, and seeds and roots from grasses. If the early hominids ate meat from grass-grazing animals like antelope, the C4 "signal" also shows up in their te...

Wild gorillas carriers of a SIV virus close to the AIDS virus

...und in the remotest areas of the Cameroon tropical forest were found to contain antibodies against this virus, called SIVgor. The genetic characteristics of the virus were present again in three gorillas living more than 400 km apart. Phylogenetic analysis of SIVgor showed it to be related to HIV-1 group O ...

End of deforestation in view? Experts advance new way to size up global forest resources

...vancing a more sophisticated approach to measuring forest cover. The novel approach looks beyond simply how...ea. It produces an encouraging picture of Earth's forest situation and may change the way governments size up their woodland resources in future. Devise...

Developing uses for sugar-cane bagasse: Biotechnology applied to the paper industry

...mand in the paper industry, at a time of dwindling forest resources, have compelled the sector to turn to other sources of raw materials, such as cereal straw, reeds, bamboo or sugar-cane bagasse. This residue, obtained after crushing of the cane, is already used as a source of paper-making fibres in prod...

Edge density key to controlling gypsy moth spread

...wing the spread of the gypsy moth is a priority in forest management in the U.S.," says Ottar Bjornstad, ass...orical, county-level quarantine records as well as forest service data from more than 100,000 pheromone traps set along the expanding gypsy moth population fr...

Soil nutrition affects carbon sequestration in forests

... many forests are deficient in soil nutrition, but forest management -- including fertilizing with nitrogen ...rate ways to predict what happens to carbon within forest systems and how this partitioning is affected by environmental conditions."...

NASA study: Alaskan fires affected Houston air quality in 2004

...eadings finds that smoke from Alaskan and Canadian forest fires as much as doubled ground-level ozone thousa...sported to the area over the course of a week from forest fires raging in Alaska and Canada. The study is the first to quantitatively examine the impact of re...

Study suggests evolutionary link between diet, brain size in orangutans

...ts wrote. "The effects of El Niño on tropical rain forest composition and diversity are also more marked in eastern compared to western parts." So Taylor and van Schaik undertook "a comprehensive re-evaluation of brain size among all orangutan species and subspecies," they wrote. Since they couldn't mea...

Fragmentation rapidly erodes Amazonian biodiversity

An international research team has discovered that forest fragmentation poses an even greater threat to Amaz...le speed at which tree communities are changing in forest fragments. “Rainforest trees can live for centuries, even millennia,?said Laurance, “so none of...

Dust to gust

...at some 56 percent of the dust reaching the Amazon forest originates in the Bodélé valley. They also showed that a total of some 50 million tons of dust make their way from Africa to the Amazon region every year, a much higher figure than the previous estimates of 13 million tons. The new estimate matches t...

Cougar predation key to ecosystem health

... said Robert Beschta, an OSU professor emeritus of forest hydrology. "That set in motion a long cascade of changes that resulted in the loss of most cottonwoods along the streambanks and heavy bank erosion." "But the end result isn't just loss of trees," he said. "It's the decline or disappear...

Report highlights change in Canada's forests

Challenge and change are central to our forest sector, according to The State of Canada's Forests...ess is well chosen," said Minister Lunn. "Canada's forest industry has reacted decisively to improve its efficiency and meet the challenges of a changing mark...

Gene therapy prevents the onset of diabetic symptoms in mice

...y human activity, said Timothy Fahey, professor of forest ecology at Cornell and co-author of the study, which is published in the May issue of Ecology. Juice wrote the main part of the paper as part of her senior thesis. "The research addresses how a long-term, human-caused change in the environment is af...

Acid rain causing decline in sugar maples, say researchers

...y human activity, said Timothy Fahey, professor of forest ecology at Cornell and co-author of the study, which is published in the May issue of Ecology. Juice wrote the main part of the paper as part of her senior thesis. "The research addresses how a long-term, human-caused change in the environment is af...

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