Biology 3222F/G Lecture Notes - Lecture 9: Terrestrial Ecosystem, Biological Pump, Carbon Cycle
7 May 2019
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Document Summary
Biomass pyramid: terrestrial ecosystem, most biomass in primary producers. Residence time: how long something remains in location. Phytoplankton turnover: growth rate, rate of replacing biomass lost to consumers. Microbial loop: pathway of carbon/nutrient cycling through microbial. Heterotropic bacteria free-living, parasites, pathogens, symbionts: detritivores, degrade dead cells and organic matter, metabolically diverse, use diff kinds of carbon energy eg. sugar, acetate, polysaccharides, cellulose. Viruses: obligate pathogens: require host to replicate, not cellular, usually kill host, release nutrients into the enviro and carbon viral shunt . Leaves trail of doc, nutrients which bac consumes. Doc distribution: labile: rapidly consumed, semi-liable: isn"t quickly consumed, still edible, refractory: not metabolized, not valued energy. Impact of microbial loop: microb decompose/consume/remineralize carbon stays in microb loop. Small, relatively large surface area to interact with enviro, uptake nutrient. Small organisms sink slower, big organism sink: changes to activity, function, interactions of organism. Will affect flux of carbon in/out of biota lots to figure out.
