MICR 221 Lecture Notes - Lecture 20: Denitrification, Commensalism, Parasitism
24 Apr 2018
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Document Summary
Ecological analysis and microbial ecology- food webs, symbiosis, biogeochem cycles. Van niel"s proposals: virtually everything can be used as a c source/e by some microbe, microbes can be found virtually everywhere on earth (microbes depend on ecosys pop niche. Area w/n habitat that supplies a particular species or comm w factors for their survival and usually defines the organisms relations w other members of ecosys. Om is cycled not lost dissolved organic matter tertiary level (fish that eat fish) 2 (fish) primary consumers (herbivores) primary producers which make biomass from inorganic c (cyabobacteria, phytoplankton) External e in ocean captured by microbes shows inter-dependence of microbes on each other and emphasizes dominance of microbes in ocean sun e used in photosynthesis o2 prod rx ult yields dissolved organic matter, co2, e. Microbes use o2 as an e- acceptor for organic comp forms co2, or use o2 to respire using reduced minerals like nh3, h2s and fe ch4+ o2 co nh3.
