Distribution of Organisms

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  • Distribution of Organsisms
    • Environmental Factors
      • Temperature
      • Availability of water
      • Availability of oxygen and carbon dioxide
      • Availability of nutrients
      • Amount of light
    • Working out the mean number of organisms per m2
      • Mean- total number of organisms divided by the number of quadrats
    • Working out the Population Size
      • Work out the mean number of organisms per m2, then multiply the mean by the total are
    • Reliability
      • Repeatable or reproducible
      • Large sample
      • Random sample
    • Validity
      • Control all variables
        • You will know whether a difference in distribution is caused by an environmental factor
        • If you don't control the other variables, you wont know whether any correlation you've found is because of an environmental factor or a different variable


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