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Climatic control of nitrate loss from forested watersheds in the Northeast United States

Article Abstract:

Nitrate loss leads to the depletion of nutrient cations in soils and may lead to the eutrophication of natural water resources especially coastal waters. An analysis of the patterns of nitrate concentration in four forested watersheds located in the Northeastern US shows synchronous patterns of nitrate concentrations of drainage waters. High nitrate concentrations resulted in high drainage water losses followed a significant decrease in nitrate levels.

Environmental aspects, Nitrates, Leaching

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Relation of climate change to the acidification of surface water by nitrogen deposition

Article Abstract:

The biogeochemical processes that control NO3- movement through forested watersheds in the Catskill Mountains of New York have been investigated. The correlation of stream NO3-concentrations with the mean annual air temperature indicate that the rates of nitrogen mineralization and nitrificatin and not deposition or vegetation uptake control nitrogen leaching from forests where nitrogen in excess of the biological demand is available.

Research and Development in the Physical, Engineering, and Life Sciences, All Other Basic Inorganic Chemical Manufacturing, Industrial inorganic chemicals, not elsewhere classified, Water Pollution Control R&D, Nitrogen Compounds, Nitrogen (Chemical element), Acid deposition, Nitrogen, Water pollution research, Catskill Mountains

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Experimental inducement of nitrogen saturation at the watershed scale

Article Abstract:

The condition of terrestrial nitrogen saturation due to the excess of vegetative demand in forested ecosystems is discussed. Nitrogen deposition was experimentally increased in one of two watersheds of the Bear Brook watershed in Maine. Results indicate the possibility of inducting nitrogen saturation, soil acidification and altered nitrogen cycling in forested watersheds at lower nitrogen deposition rates.

Analysis, Nitrogen metabolism

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