Biogeochemical Cycling

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Presentation transcript:

Biogeochemical Cycling

HNO3 NOx SOx Motivation

USGS

Many scientific studies have identified a relationship between elevated levels of fine particles and increased illness and premature death from heart and lung disorders, such as asthma and bronchitis. http://www.epa.gov/acidrain/effects/health.html

Brief lesson in soil biology

Nutrient cycling takes three primary modes…

Figure 22.1

The Nitrogen Cycle (1012 g N/yr) Figure 22.8 The Nitrogen Cycle (1012 g N/yr)

Figure 22.7

Nitrogen saturation impacts North American ecosystems Brief lesson in soil biology…

Figure 22.10 Phosphorus cycling

Figure 22.9 Phosphorus cycling

Pools & Fluxes in the Calcium Cycle

Sulfur cycle, important but still being worked out… Figure 22.12 Sulfur cycle, important but still being worked out…

Biogeochemical cycling