B2 - Distribution of Organisms

  • Environmental variations
  • Quadrants
  • Calculating population sizes
  • Calculating environmental data
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What is the difference between habitats and distribution?
Habitat is where an organism lives, distribution is where an organism is found.
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What are the main environmental factors?
Temperature, availability of water, oxygen & carbon dioxide, availability of nutrients, amount of light.
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How do you use a quadrant?
Place the quadrant in a random area. Count all the organisms in the quadrant, repeat and find the mean.
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How do you work out the population size?
Mean number of organisms X total area
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What are the two points for collecting environmental data?
Reliability - Are they repeatable and reproducable? Take a larger sample size and use random sample. Vilidity - Do they answer the original question? Make sure the variables are controlled.
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Other cards in this set

Card 2

Front

What are the main environmental factors?

Back

Temperature, availability of water, oxygen & carbon dioxide, availability of nutrients, amount of light.

Card 3

Front

How do you use a quadrant?

Back

Preview of the front of card 3

Card 4

Front

How do you work out the population size?

Back

Preview of the front of card 4

Card 5

Front

What are the two points for collecting environmental data?

Back

Preview of the front of card 5

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