BIMM 120 Lecture15.Bioremediation.051911

BIMM 120 Lecture15.Bioremediation.051911 - BIMM 120...

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HW#2 will be available on WebCT on Tuesday 5/24 BIMM 120 Announcements BIMM 120 Announcements A modest request from your humble professor. .. A modest request from your humble professor. .. PLEASE complete a CAPE evaluation for this class! I strive for teaching ninja-warlock status and your evaluations are very valuable. ..
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...as usual. .. ...as usual. .. Lecture 14 – Microbial Biogeochemistry Elemental Cycles - Carbon Principles of Microbial Ecology Nitrogen Cycle Nitrogen Cycle Sulfur Cycle Sulfur Cycle Iron Cycle Iron Cycle
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Global net primary productivity Global net primary productivity * Sargasso Sea The global carbon cycle is intimating connected with all other elemental cycles. ... Primary productivity = production of organic compounds from CO 2 via photosynthesis
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Nitrogen can severely limit primary productivity. .. Nitrogen can severely limit primary productivity. .. Figure 55.7 – Biology, Campbell 8/E
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Global Nitrogen Cycle Global Nitrogen Cycle Nitrogen is an essential nutrient in ALL organisms Microorganisms are the major players in N transformations Interplay between N 2 fixation, nitrification and denitrification sets the global N cycle (other processes work within nitrification/denitrification cycles)
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dissimilatory NO 3 reduction Marine Nitrogen Cycle Marine Nitrogen Cycle
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Global Sulfur Cycle Global Sulfur Cycle Highly complex !! The marine S cycle (high SO 4 2- ) largely sets the global S cycle Several great examples of anaerobic respiration & chemolithotrophy
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grazing phytoplankton bacteria DMS SO 2 direct light scattering by aerosols indirect light scattering by clouds CCN sulfate aerosols act as cloud condensation nuclei (CCN); DMSP = dimethyl sulfonium proprionate; DMS = dimethylsulfide Feedback regulation of regional climate due to Sulfur Cycling ph Feedback regulation of regional climate due to Sulfur Cycling ph enomena enomena DMSP DMS sulfate aerosols zooplankton
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Iron Iron Redox Redox Cycle Cycle electron donor electron acceptor Iron is also an essential nutrient for all organisms, and like Nitrogen, can limit productivity in some habitats (e.g., marine systems) Recall, many microbes produce Fe-chelating agents called SIDEROPHORES to scavenge Fe from their environments (for nutritional needs. ..)
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Table 55.1 – Biology, Campbell 8/E
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Ocean Fertilization and Direct CO Ocean Fertilization and Direct CO 2 Injection Injection Ocean Fertilization: mitigation strategy aimed at enhancing the transport of carbon through the base of the euphotic zone into the deep sea for long term sequestration. A possible useful by product is increased fish yields via stimulation of the base of the oceanic food web. Negative side effects could include toxic algae blooms. “Geoengineering” proposals for greenhouse abatement
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BIMM 120 Lecture15.Bioremediation.051911 - BIMM 120...

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