Microscopic Life in Water-B6

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  • Created by: Shannon
  • Created on: 09-06-13 14:06
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  • Microscopic Life in Water
    • Living in water advantages: no water shortage/ dehydration, less variation of temperature, waste is easily disposed
      • Living in water disadvantage-s: resistance of movement-water more dense than air, body water content needs to be controlled
    • Fresh water- take up too much water by osmosis
      • Salt water- lose water to surroundings
    • Amoeba-contractile vacuole: store excess water- fuse with cell membrane and empty water
    • Phytoplankto-n and zooplankton- numbers vary with depth and season
      • Phytoplankto-n- less light in winter, deeper in the water, minerals are used up towards the end of the summer
        • Temperature will be lower and deeper in the water
    • Food webs of marine life-deep life-marine snow- dead material
      • Some rely on green plants, bacteria
    • Sewage and fertiliser run off causes eutrophicatio-n
      • Some species are more sensitive to pollution- act as biological indicators
        • Untitled
  • Sewage and fertiliser run off causes eutrophicatio-n
    • Some species are more sensitive to pollution- act as biological indicators
      • Untitled

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