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- Info
Nitrogen saturation in northern forest ecosystems
| Author: |
Aber, John D.; Nadelhoffer, Knute J.; Steudler, Paul; Melillo, Jerry M. |
| Date: |
1989 |
| Periodical: |
Bioscience |
| Abstract: |
Human activity has greatly altered the biogeochemical cycles of Earth, generally increasing pollutant concentrations in the atmosphere and deposition rates to the surface. The combustion of fossil fuels is a major component of human impact on the atmosphere and biosphere. Acid deposition, or acid rain, is one important phenomenon associated with the burning of coal, gasoline, and oil. Until recently, sulfur emissions and sulfuric acid deposition have been the focus of US regulation on acid rain. There is, however, increasing concern about the nitrogen component of emissions and its potential effects on air quality, water quality, and the health of forest ecosystems. |
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