BIOL241 Study Guide - Midterm Guide: Lambda Phage, Anoxygenic Photosynthesis, Anaerobic Respiration
5 Aug 2016
School
Department
Course
Professor
Document Summary
Community 3 anoxic sediments: light does not reach the bottom sediment, but other materials are settled down for these organisms for energy. Light and energy diminish as you go down: guild 1: denitrifying bacteria and iron-reducing bacteria. Gain of electrons/loss of oxygen/gain of hydrogen: guild 2: sulfate and sulfur reducing bacteria. Produce hydrogen sulfide as end-product: guild 3: fermentative bacteria. Anaerobic, atp-producing: guild 4: methanogens and acetogens. Organisms are classified in terms of their energy and carbon sources: a given microbe can have the ability to carry out more than 1 type of metabolism. Primary production of organic matter: phototrophic/chemolithotrophic activity: inorganic matter organic matter, co2 + h2o + energy new biomass. Decomposition of organic matter: chemoorganotrophic/heterotrophic activity: dead biomass co2 + h2o + energy. Biogeochemical cycling of elements (c, n, s, p, fe: example: if soil has sulfate concentration that decreases over time, that must mean there is sulfate-reducing bacteria there.
