RelativeResourceManager.page02 - chemicals to drive their...

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NRES 201 Intro Soil Science Lec. 25-26 Soil Organisms Ch. 10 3/4/2007 2 Soil organisms can be: Soil organisms can be: Aerobic: Use oxygen as a terminal electron acceptor and produce CO 2 gas as a waste product. Anaerobic: Use nitrate (NO 3 - ), nitrite (NO 2 - ), ferric iron (Fe 3+ ), sulfate (SO 4 2- ) or other oxidized species as terminal electron acceptors and produce alcohols, methane, acetone etc. as waste products Soil organisms can be: Autotrophic: Utilize light or the bond energy of inorganic
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Unformatted text preview: chemicals to drive their metabolism. Heterotrophic: Oxidize reduced organic materials produced by other organisms to provide energy to drive their metabolism. Soil organisms can be: Symbiotic: Live in a mutually beneficial association with an other species. Parasitic: Live in an association with another species, but at the expense of the other species. Free living: Independent of parasitic or symbiotic associations with other species....
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