EESA01H3 Chapter Notes - Chapter 3: Great Lakes Areas Of Concern, Biochemical Oxygen Demand, Human Waste
20 Sep 2017
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Producers pull co2 from atmosphere and surface water for photosynthesis. Photosynthesis breaks bonds in co2 and h2o producing o2 and carbs(glucose) Autotrophs use some carbs to fuel own respiration + release some carbon back into atmosphere and oceans as co2. Producers eaten by primary consumers then secondary consumers; more carbs broken down producing co2 and water: decomposers consume waste + dead organic matter. Sedimentary rock largest single reservoir in carbon cycle: eventually released into ocean/atmosphere. Via tectonic uplift, volcanic eruptions, or burning of fossil fuels: ocean is second largest reservoir in carbon cycle, ocean absorb carbon from many sources. Terrestrial runoff: undersea volcanoes, waste and detritus of marine organisms, carbon atoms absorbed in many forms, carbon dioxide: co2, carbonate ions: co3^2- Bibarconate ions: hco3: calcium carbonate: caco3(combined with calcium, key ingredient in skeletons and shells. 2. 3-2. 6 billion metric tons of unaccounted carbon dioxide every year: believe its from plants or soil. Nitrogen: nitrogen makes up 78% of atmosphere by mass.
