Ch21-22

Ch21-22 - 11/23/2011 Microbial Ecology and the Global...

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11/23/2011 1 Microbial Ecology and the Global Environment Essentials from Chapters 21 + 22 Figure 21-0 Microbial Ecology. Termite gut symbiont, Nymphotricha agilis : Yellow = wood chips being ingested (phagocytosis). Red = termite Group 1 bacteria (cellulase) Green = Desulfovibrio. Biochem: cellulose Î glucose Î CO (NADH glucose 2 (NADH electron transfer to sulfate by Desulfovibrio . + tremendous amounts of H 2 and CH 4 .
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11/23/2011 2 An Egg Bearing Copepod The eggs require a chitinase producing bacterium for hatching – the environmental home for Vibrio cholerae Microbes are Everywhere There are no natural occuring organics or reduced minerals that can’t be used by some bacterium somewhere Microbes in: Aquatic Terrestrial Crustal Rock What’s the difference between Carbon Assimilation and Dissimilation ?
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11/23/2011 3
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11/23/2011 4 The End Product of One Metabolism is Used by Another Metabolism Î Geochemical Cycles Table 21-2 Extremophiles.
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11/23/2011 5 Table 21-3 Types of interactions involving microbial species.
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11/23/2011 6 Figure 21-4 Lichens. Figure 21-5 Boreal forest ecosystems and native cultures depend on lichens.
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11/23/2011 7 Figure 21-6 Cryptogamic crust: community of lichens+mosses+algae+fungi Crust (desert) holds in moisture, protects plant seeds, prevents erosion. It takes years to develop. Approx 1cm deep Symbioses can be Several-Way The Curious Case of Mixotricha paradoxa From Termite Gut – Symbiosis Digests Cellulose
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11/23/2011 8 Four Exocellular Bacterial Symbionts 2 types of Spirochetes
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This note was uploaded on 12/28/2011 for the course MCB 3020 taught by Professor Staff during the Fall '08 term at FIU.

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Ch21-22 - 11/23/2011 Microbial Ecology and the Global...

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