Microbial Populations in H2O - chemlithotrophs


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what are chemlithotrophs, chemlithotroph requirements, survival of chemlithotrophs, uses of chemlithotrophs, Thiobacillus, Ferrobacillus, Beggiatoa, Hydrogenomonas

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Microbial Populations in H2O - chemlithotrophs

  1. 1. Microbial Population in H 2 O chemlithotrophs b.stev
  2. 3. inorganic substances provide ENERGY ammonia/ sulphur/ nitrate/ iron & hydrogen WHAT ARE THEIR NEEDS TO survive? O 2 is NOT always essential CARBON is NOT always essential (Wikipedia, 2008)
  3. 4. CO > carbon monoxide H 2 S > hydrogen sulphide SO 2 > sulphur dioxide NH 3 > nitrate NO 2 > nitrite H 2 > hydrogen
  4. 5. Temperature Deep sea thermal vents harbour these microbes at 230-360 o C Beggiatoa –likes sulphur Hydrogenomonas – likes hydrogen
  5. 6. Chemlithotrophs are in... Rivers and Lakes: are much cooler, 3-15 o C Nitrosomonas – like nitrogen AND in Mines: are ALSO cool : Thiobacillus – likes iron Gallionella – likes iron Smso.net, 2005
  6. 7. CHEMLITHOTROPHS do not have an affinity with light. Light is not essential to their metabolism Exposure would DECREASE growth as it does not live in the light DIRECT SUNLIGHT is used to kill off microbes in the tropics
  7. 8. CHEMLITHOTROPHS live where the conditions favour their needs. For example : “ Beggiatoa,” that needs sulphur is located in mines, caves & thermal areas. If it was taken from it’s habitat to a habitat that does not have sulphur it would not survive
  8. 10. the amount of salt in the water <ul><li>Some survive in H 2 O that is 35% salt </li></ul><ul><li>the microbe has special walls that repel salt . </li></ul><ul><li>substance inside like salt, no absorption occurs </li></ul><ul><li>a pump system that ejects the absorbed salt </li></ul>
  9. 11. <ul><li>used to cure animal hides by breakdown of the layers </li></ul><ul><li>Reduce salinity of land </li></ul><ul><li>so that crops can grow </li></ul>
  10. 12. Microbes don’t grow as well in quiet waters as the nutrients are eventually depleted
  11. 13. when,” O 2 ,“ is not needed the bottom sediment is home These are ANAEROBIC MICROBES microbes that need,” O 2 ,“ are near the water surface These are AEROBIC MICROBES (Wikipedia, 2008)
  12. 14. re <ul><li>some only survive in these conditions </li></ul><ul><li>These microbes are located: </li></ul><ul><li>structures of incredible pressures </li></ul><ul><li>great depths of the ocean </li></ul>some CHEMOLITHOTROPHS are able to withstand very steep pressures
  13. 15. Bibliography Smso.net. (2005). Chemlithotrophy . Retrieved September 14, 2008, from http//: www.smso.net/ Chemolithotrophy - 20k Smso.net. (2005). Litotrophs and Phototrophs other ways to get energy . Retrieved September 14, 2008, from http://faculty.weber.edu/mzwolinski/IntroMicro/111 3Units/Unit%203/Litotrophs%20and%20Phototrophs.pdf Wikipedia. (2008). Lithotrophs – wikipedia, the free encyclopedia . Retrieved September 13, 2008, from http://en.wikipedia.org/wiki/Lithotroph