BIOL241 Lecture Notes - Lecture 1: Streptococcus, Periodontitis, Extracellular Polymeric Substance

• School: University of Waterloo
• Department: Biology
• Course: BIOL241
• Professor: Barbara Butler

Document Summary

Study of interrelationships between microorganisms and their environments. Energy flow and materials cycling in the ecosystem. For example: microbial inhabitants of a freshwater lake ecosystem. Organisms can be classified in terms of their energy & c sources. Wimpy gains energy, creates new biomass & excretes co2, h2o, other metabolic waste products. Wimpy & e. coli both growing as aerobic chemoorganotrophic heterotrophs here but: that(cid:495)s wimpy(cid:495)s sole option fermentation) more flexible, e. coli can also grow without o2 (either by anaerobic respiration, or by. E. coli gains energy, creates new biomass & excretes co2, h2o, other metabolic waste products. The majority of microbes we discuss (& ones you work with in lab) are chemoorganoheterotrophs (also just called organotrophs or heterotrophs) Some chemolithoautotrophs are important in c, n, s cycling (e. g. , nh3-oxidizers, Photolithoautotrophs are key primary producers (form organic matter from inorganic materials) plants (way too big for us! Cyanobacteria: autotrophic (co2 as c source); oxygenic (split h2o to produce.