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Wildfire drives carbon levels in northern forests
10-31-2007 · EurekAlert!Far removed from streams of gas-thirsty cars and pollution-belching factories lies another key player in global climate change. Circling the northern hemisphere, the conifer-dominated boreal forests -- one of the largest ecosystems on earth -- act as a vast natural regulator of atmospheric carbon levels.
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Keywords: wildfire, drives, carbon, levels, northern, forests, drive, level, forest
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- European Union forests expanding, absorbing carbon at surprisingly high rate: study
11-29-2007 · EurekAlert!
University of Helsinki researchers say European Union forests are expanding and absorbing carbon at a higher than expected rate. And they say at least partial credit for nurturing its carbon sink through forest expansion is likely needed by the EU to reach its ambitious post-Kyoto goal of reducing greenhouse gas emissions 20% by 2020 from 1990 levels
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- Brazil demonstrating that reducing tropical deforestation is key win-win global warming solution
05-15-2007 · EurekAlert!
Recent studies by Woods Hole Research Center scientists demonstrate that during years of severe drought, tropical rainforest fires can double emissions from tropical forests. Now, an international team of forest and climate researchers has found that halving deforestation rates by mid-century would account for 12 percent of total emissions reductions needed to keep concentrations of heat-trapping gases in the atmosphere at safe levels. This work is profiled in a recent issue of Science.
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- Drop in acid rain altering Appalachian stream water
12-12-2006 · EurekAlert!
Appalachian hardwood forests may be getting a respite from acid rain but data from a long-term ecological study of stream chemistry suggests that the drop in acid rain may be changing biological activity in the ecosystem and hiking dissolved carbon dioxide in forest streams.
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- Fossil record suggests insect assaults on foliage may increase with warming globe
02-11-2008 · EurekAlert!
More than 55 million years ago, the Earth experienced a rapid jump in global carbon dioxide levels that raised temperatures across the planet. Now, researchers studying plants from that time have found that the rising temperatures may have boosted the foraging of insects. As modern temperatures continue to rise, the researchers believe the planet could see increasing crop damage and forest devastation.
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- Soil nutrition affects carbon sequestration in forests
12-13-2006 · EurekAlert!
On December 11, USDA Forest Service (FS) scientists from the FS Southern Research Station (SRS) unit in Research Triangle Park, NC, along with colleagues from Duke University, published two papers in The Proceedings of the National Academy of Science (PNAS) that provide a more precise understanding of how forests respond to increasing atmospheric concentrations of carbon dioxide (CO2), the major greenhouse gas driving climate change.
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- Elevated Carbon Dioxide Changes Soil Microbe Mix Below Plants
12-19-2007 · Brookhaven National Laboratory
A detailed analysis of soil samples taken from a forest ecosystem with artificially elevated levels of atmospheric carbon dioxide (CO
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- Slow but sure -- Burned forest lands regenerate naturally
04-04-2007 · EurekAlert!
A new study of forest lands that burned in the 1990s in northern California and southwestern Oregon has concluded there is a "fair to excellent" chance that an adequate level of conifers will regenerate naturally, in sites that had no manual planting or other forest management. Whether lands should be planted and weed competition controlled is more a question of short-term timber production, tree species control and forest management goals than the regeneration of the forest, the study indicated.
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- Invasive grass may impede forest regeneration
04-09-2007 · EurekAlert!
The non-native invasive grass Microstegium vimineum may hinder the regeneration of woody species in southern forests. Chris and Sonja Oswalt (Forest Service Southern Research Station) and Wayne Clatterbuck (University of Tennessee) set up experiments on a mixed-hardwood forest in southwest Tennessee to study the growth of the invasive grass under different levels of forest disturbance. Study results were published online in the journal Forest Ecology and Management on March 27, 2007.
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- Exposure to sunlight may decrease risk of advanced breast cancer by half
10-18-2007 · EurekAlert!
A research team from the Northern California Cancer Center, the University of Southern California, and Wake Forest University School of Medicine has found that increased exposure to sunlight -- which increases levels of vitamin D in the body -- may decrease the risk of advanced breast cancer.
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- Trouble for forests of the northern U.S. Rockies?
06-16-2007 · Science News Online
Climate change over the coming decades may cause forests in northern portions of the U.S. Rockies to stop absorbing carbon dioxide from the atmosphere and instead become net emitters of the gas.
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