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Global Change Impacts & Adaptation

Biogeochemical Cycles

Climate change and nitrogen deposition are two of the largest anthropogenic stressors on the environment today. These two stressors have individual and interactive impacts on ecosystem structure and function, including effects on biodiversity, carbon sequestration, nitrogen retention, and water quality, among others. We are developing initial estimates of impacts from nitrogen deposition on terrestrial plant biodiversity for the U.S. to provide scientific support for a possible secondary standard for the National Ambient Air Quality Standards under the Clean Air Act. We use field monitoring and dynamic modeling to examine how climate change and nitrogen deposition will interact to impact biodiversity, and how reductions in emissions will affect ecological end points such as water quality, biodiversity, and soil health. Finally, we are developing online tools and public reports to help natural resource managers integrate these scientific findings into their management strategies.

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