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  • what i get from this presentation is, that algae are used for many products. And that they eat sewage and clean water in the process.
    Can't these two properties be used to clean water and produce algae both at once?
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    Algae notes Algae notes Presentation Transcript

    • ALGAE PLANT OR PROTIST?
    • CHLOROPHYTA – green algae Unicellular ->colonial->multicellular
    •  
    • General Characteristics of Algae
      • Photosynthesize (chlorophyll a)
      • Cell walls
      • No specialized root/stem/leaf structures
      • Non-vascular
      • Must live in or near water
    • WHY must algae live in/near water?
      • Don’t have an internal system of tubes to move water and materials from one part to another NON VASCULAR
      • SO WHAT ? ?
      • Cells must be able to get oxygen, CO2, nutrients and get rid of wastes
      • HOW ? ?
    • Cells must live in water to be constantly bathed with the nutrients they need and to get rid of the wastes they don’t need.
    • c
    • WHAT ADAPTIONS HAVE THEY MADE TO LIVE IN WATER?
      • Won’t dry out, therefore many are very thin
        • ex. ulva 2 cells thick
        • Unlike desert plants - - - no cuticle or waxy covering
      • No support structures
        • Water supports them
      • Simpler reproductive cycle
        • Easier in water because the gametes can swim 
      • Lack of light
        • Evolve different chlorophylls and accessory pigments
    • ULVA - Sea Lettuce
    •  
    •  
    •  
    • Dead man’s fingers
    • Wavelengths of light
    • DIVISIONS OF ALGAE
      • Brown - Phaeophyta
          • Chlorophyll a + c + fucoxanthin
      • Red – Rhodophyta
          • Chlorophyll a + d
      • Green – Chlorophyta
          • Chlorophyll a + b
    •  
    • EVOLUTION OF PLANTS
      • Unicellular – Chlamydomonas
        • (eyespot)
      • Colonial – Gonium, Volvox
        • (communication, specialized reproductive cells)
      • Multicellular – Ulva
        • (holdfast)
    • ALTERNATION OF GENERATION
    • IMPORTANCE OF ALGAE
      • Food source
      • Home / shelter
      • Oxygen
      • Medicine – treat ulcers, high blood pressure
      • Manufacturing of food
        • Ice cream, candy bars, pickle relishes, salad dressing, chip dips, pancake syrups, egg nogs, canned chow mein, toothpaste, adhesive, hand lotion, finger paints, cake batter, pie fillers, doughnut glazes, agar
    • Algae products
    • ECOLOGY AND PUBLIC HEALTH
      • SEWAGE…untreated sewage released into streams and ponds can cause algal blooms
    • How does sewage cause this?
      • Sewage contains substances that plants can use as nutrients…acts as fertilizer for the algae to grow
      • Challenge is to find ways to treat sewage that is safe for the water…