BIOLOGY 2EE3 Lecture Notes - Lecture 3: Bioaugmentation, Basidiomycota, Eutrophication
12 Aug 2016
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Document Summary
Biogeochemical cycles link metabolic processes of organisms for production of degradation of biomass. All biomass consists of biogenic elements in roughly similar proportions (c, Often involves change in oxidation state (organisms contribute via redox reactions) Elements are contained in reservoirs (terestrial, aquatic, atmosphere) Flux is the movement of elements between reservoirs (eventually reach equilibrium) Air collected in a sealed cylinder is subjected to infrared radiation. If more is absorbed (not detected), more co2 is present. Use of mesocosms (artificially enclose ecosystems) can measure change over time. Molecules are labeled with radioactive elements prior to release in mesocosm. Determination of the movement of the radioactively labeled elements through the mesocosm can inform researchers on cycling methods. A balance is maintained between organic and inorganic carbon reservoirs. Complementary metabolic activities of photosynthesis, respiration and decomposition maintain the balance. Human activity can disrupt these cycles inc atmospheric levels of greenhouse gasses. Photosynthesis, respiration and decomposition if co2 fixation exceeds respiration, organic matter accumulated.
