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Lecture #17 - Lecture 17 Biogeochemical Cycles of The...

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1 Lecture 17 Lecture 17 BBOM 11e Sec. 19.5, 19.9-19.10, 19.17-.18, 17.23 Biogeochemical Cycles of The Elements The Carbon Cycle Biogeochemical Cycles of The Elements The Carbon Cycle Four Things to Remember About Biogeochemical Cycles of the Elements Biogeochemical Cycles of the Elements 3. Most biogeochemical transformations happen inside microbial cells 2. Microbes catalyze the majority of biogeochemical transformations 1. An element never acts alone 4. Environmental factors control microbial guild activity Chemical Linkages = Redox reactions Community Structure and Guild Activity Cell Structure, Nutrition, and Metabolism Microenvironmental processes and surface effects Temperature, pH, Salinity, O 2 concentration, radiation, …
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