20_microbial_processes_2

20_microbial_processes_2 - Marine Microbial Processes II...

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1 Marine Microbial Processes II Outline Friday • size-structured food web • A brief history of the development of our current understanding of the abundance and function microbes in marine food webs Monday (Today) • The role of microbial processes in Carbon and Nitrogen cycling within marine food webs • evolving concepts From Last Friday…
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2 Summary: Early 1970’s versus Early 1980’s Prochlorococcus (very small autotrophic bacteria) was discovered in the late 1980’s. It was later shown to be responsible for over 1/4 of the total global ocean net primary production. Relative Importance of and Heterotrophic Bacteria in Oligotrophic Systems
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3 Definitions Oligotrophic: Pelagic environment (water column) that has very low plant nutrient concentrations Eutrophic: Pelagic environemnt (water column) that have very hight plant nutrient concentrations The Role of Microbes in Material Flow Through Marine Ecosystems… Nutrient-Dependency of Primary Production
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4 The pathway that carbon takes from CO 2 through
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20_microbial_processes_2 - Marine Microbial Processes II...

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