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MSU MMG 301 - Module 25

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Module 25Be able to describe what a niche is Populations and guilds of microorganism live in microenvironments where factors such as nutrients, antagonism by other organisms, pH, temperature, and other condition form a nicheList some of the benefits of living in biofilms; what happens in each stage of biofilm development Some benefits of living biofilms are physical protection, attachment, enhanced quorum sensing and nutrient exchange, and serve as a source of microbial inoculum.1. Few cells attach2. Growth (colonization)3. Growth4. Dispersal Provide examples of how biofilms affect humans Biofilms in contact lens case, microbial biofilms on teeth and gums develop acid producing plaque and destroy tissue leading to tooth decay and gingivitisExplain how Pseudomonas aeruginosa is associated with cystic fibrosis, and how Dornase can help Pseudomonas aeruginose is associated with cystic fibrosis because its an important pathogen, causes pneumonia in CF patients. Dornase can help break down the biofilm formation in the lungs.Provide examples of advantages microbes can have with they live in biofilms Advantages microbes can have when they live in biofilms Describe how thermal stratification results in anoxic conditions in the hypolimnion; Why are hydrogen sulfide concentrations higher in the hypolimnion Thermal stratification is the declining temperature at increasing depth results in stratification of the lake waters. Hypolimnion- microbes use up remain O2, anaerobic respiration, sulfate== H2S hydrogen sulfideReview the characteristics of O2, bacteria (+ organic carbon and BOD), algae, as they changedownstream of a pollution entry point in a river; why is BOD proportional to the amount of dissolved organic pollution in a water sample BOD is proportional to the amount of dissolved organic pollution in a water sample because the greater the pollution the higher the O2 consuming rate is.What are the bacterial and eukaryotic primary producers in open ocean waters; explain why small cell size is an advantage to microbes living in the open ocean Bacterial cyanobacteria: oxygenate photosynthetic bacteriaEukaryotic unicellular alga, common them is microorganism living in low nutrient habitats like the open ocean small cell sizeDescribe unique features of habitats around deep ocean hydrothermal ventsSome unique features of habits around deep ocean hydrothermal vents are warmer habitats near vents provide environment for microbes to grow, no sunlight penetrates to the region, ecosystem based on chemical energy instead of solar

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