EVSC 1080 Study Guide - Midterm Guide: Harmful Algal Bloom, Eutrophication, Coral Reef
21 May 2016
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Document Summary
Nox emissions are responsible for tens of thousands of excess-deaths per year in the united states. O3 and n2o contribute to atmospheric warming. N2o emissions contribute to stratospheric o3 depletion. N is the limiting nutrient in most temperate and polar ecosystems. Nr deposition increases and decreases forest and grassland productivity. Nr additions decrease biodiversity across the entire range of deposition. As reductions in so2 emissions continue, nr deposition becomes more important. Atmospheric deposition is a more important nr source than riverine injection. Atmospheric nr imputs to open ocean have increased 3 times since 1860, and will double by 2050. Energy production converts n2 to nitrogen oxides which contributes to smog and visibility losses. Nitrogen oxides cause acid rain which acidifies soils, waters, and impacts plant production. Agro-ecosystems feed the worlds peoples but do not retain n very efficiently. Benefits: nr creation provides enough food for the worlds population.
