Lec 10 - Lecture 10 BIS2b Fall 2009 The Carbon Cycle c...

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Lecture 10 BIS2b Fall 2009 The Carbon Cycle c Earthrise by W. A. Anders, from Apollo 8, Dec 24, 1968
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Photosynthesis and Decomposition are a) Opposite ecological processes in terms of fixed carbon, O 2 , and CO 2 b) Complement each other. The first fixes carbon and the second supplies nutrients back to the green plants that fixed the carbon. c) Are both necessary for the biosphere to function as it does. Without the first, there would be no biomass, and without the second all nutrients would be tied up in dead biomass. d) Not necessarily complementary because we now have the Haber Bosch process to fix nitrogen. e) a-c.
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Decomposition a. by bacteria and fungi releases CO2 to the atmosphere. b. breaks down NPP in the presence of oxygen. c. In the presence of O 2 will prevent the accumulation of fixed carbon and the build up of precursors to fossil fuels. d. Is greatly slowed and even stopped in the absence of O 2 e. a-d
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The Carbon Cycle is one of the Biogeochemical Cycles. Others are the nitrogen cycle, the oxygen cycle, the sulfur, phosphorous, potassium, and even the sodium cycle. All are influenced by life and non living processes. All of these elements cycle through living material then are deposited in the earth, where they move slowly by movements of the earth’s crust.
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1. Geology, mountain building, and continental drift have buried CO 2 for over 3 billion years . 2.
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This note was uploaded on 04/21/2010 for the course BIS 2C BIS 2C taught by Professor Rizzo during the Winter '09 term at UC Davis.

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Lec 10 - Lecture 10 BIS2b Fall 2009 The Carbon Cycle c...

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