Lecture #17

Lecture #17 - 1 Lecture 17 Lecture 17 BBOM 11e Sec 19.5...

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Unformatted text preview: 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 Four Things to Remember About 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, … 2 The Carbon Cycle: Sources, Sinks, Major Reservoirs The Carbon Cycle: Sources, Sinks, Major Reservoirs 38,000 1,500 14,200 ** 75,000,000 DOM 1,000 X 10*9 Metric tons 600-900 BBOM 10e Sec. 19.9, Table 19.3 2002 = 725 (+5%) Largest source of atmospheric CO2 is human activity (Before 1850) = 610 =>(1978) = 692 (+15%) ** Methane hydrates =10,000 How Photosynthesis and Respiration Link The Carbon Cycle to The Oxygen Cycle How Photosynthesis and Respiration Link The Carbon Cycle to The Oxygen Cycle O 2 H 2 O Oxic environments 3 How The Carbon Cycle Is Linked to The Hydrogen Cycle by Methane How The Carbon Cycle Is Linked...
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This note was uploaded on 02/13/2008 for the course BIO 2900 taught by Professor Ghiorse during the Fall '07 term at Cornell.

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Lecture #17 - 1 Lecture 17 Lecture 17 BBOM 11e Sec 19.5...

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