ISP217-Spring08_Review_Sheet_for_Test_2_ -...

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feb853d2e53061a400cdc90ceca20a5708e5c732.doc 1 Lecture 10 Water Chemistry II Key Terms Lithosphere Hydrosphere Biosphere Pool – stock – reservoir Processes – flow Elemental cycle Detritus All the terms in the elemental cycles Aerobic bacteria Cyanobacteria To Know Are molecules created or destroyed? When, if so? Are elements created or destroyed? When, if so? Elements are not created or destroyed (on earth). Elements change in molecular form as they cycle between the atmosphere, the lithosphere, the hydrosphere and the biosphere What is an example of a pool and process in an elemental cycle? Pools are location of the element. (stock, reservoir). Element in a compartment. Does photosynthesis change the molecular form? Does evaporation? What is an example of organic and inorganic C? What “sphere” are they found in? Organic- in or produced by organisms (biosphere) Inorganic- CO2 and carbonates (lithosphere, atmosphere and hydrosphere) Does all organic carbon reside in living organisms? CO2 and carbonates (lithosphere, atmosphere and hydrosphere) Main part of lecture: Carbon, Nitrogen and Phosphorous cycle: Know what all the different processes are. That is, know what the arrows are for the cycles. (Remember these were filled in in class). These include: Decomposition – By Bacteria and Fungi Sedimentation – To Storage Photosynthesis – Carbon Fixation Inorganic to Organic Respiration-- Feeding Death and Defication Burning - From Storage Excretion Nitrification Nitrogen fixation Adsorption/desorption Know the inputs (origin of) the chemicals in the carbon, nitrogen and phosphorous cycles. Carbon Cycle – From Air (CO 2 ) and Water Sheds (CO 2 and HCO 3 ) Nitrogen Cycle – Nitrogen Gas and Water Shed (NO 3 - and NH 4 + )
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feb853d2e53061a400cdc90ceca20a5708e5c732.doc 2 Phosphorous Cycle – Water shed PO 4 -3 What pool has carbon been “stuck” in for millions of years that humans are busily releasing? What is a new carbon pool where carbon is stuck? What does most of the “decomposition” in the elemental cycles? Bacteria and Fungi What does the nitrification in the N cycle? Aerobic Bacteria What does the nitrogen fixation? Cyanobacteria What are the three forms of nitrogen that are used by plants? Which takes more energy? NH 4 – Preferred by plants; Can be toxic at high concentrations and high pH. NO 3 - takes more energy N 2 (most plants can’t use) What do animals produce that is toxic to them? What is the solution to this problem used in an aquarium? What is the role of bacteria? Excretion and decomposition produce ammonia. Ammonia can be toxic at high concentrations and high pH Bacteria is the solution, it “nitrifies.” Why are cyanobacteria important in lakes? (e.g. what can they do that other organisms can’t?) They can fix the Nitrogen level in a lake. What is a key difference in the way P enters lakes versus N and C?
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This note was uploaded on 03/30/2008 for the course ISP 217 taught by Professor Peacor during the Spring '08 term at Michigan State University.

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ISP217-Spring08_Review_Sheet_for_Test_2_ -...

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