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Synergism Example of cross-feeding Compound A Population 1 Compound B Population 2 Compound C 1 + 2 Energy + end products
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Biogeochemical cycling Describes the transport and transformation of materials caused by biochemical activities in atmosphere, soil and marine environments. Occurs Globaly and in micro habitats Transformations * Physical : Leaching, precipitation, evaporation and immobilization * Chemical:: Biosynthesis, biodegradation, oxidation/reduction Microorganisms: Assimilation Biosynthesis Biotransformation Excretion
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Methane and methanogenesis Methanogenic bacteria 4H 2 + CO 2 CH 4 + 2H 2 0 Other sources (electron donors) for methan production: CH 3 OH - methanol HCOO - formate CH 3 SH methyl mercaptan CH3COO - acetate
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