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Lichens function as indicators of nitrogen pollution in forests
Date:10/6/2008

ause of their complex hydrological, nutrient cycling, wildlife forage and nesting material roles.

"Quantifying nitrogen critical loads helps land managers determine the point at which unacceptable impacts occur to sensitive ecosystems," Fenn said. "This helps bring air quality management that is more firmly rooted in ecosystem protection."

The United Nations' International Cooperative Program on Effects of Air Pollution on Natural Vegetation and Crops has led the largest effort to quantify nitrogen critical loads. Similar coordinated efforts do not exist in the United States. But, U.S. research in critical loads is increasing.


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Contact: Roland Giller
rgiller@fs.fed.us
510-559-6327
US Forest Service, Pacific Southwest Research Station
Source:Eurekalert

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