Distribution of Organisms
- Created by: sxdewinder`
- Created on: 10-05-15 17:34
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- Distribution of Organisms
- Live in different places because the environment varies
- The distribution of an organism is where an organism is found
- Where an organism is found can depend on
- Temperature
- Availability of water
- Availability of oxygen and carbon dioxide
- Availabilty of nurtients
- Amount of light
- Use quadrats to study the distribution of small organisms
- A quadrat is a square frame enclosing a known area, to compare how common an organism is in two sample areas
- 1)Place a 1m square quadrat on the ground at a random point
- 2)Count all the organisms within the quadrat
- 3)Repeat the steps 1 and 2 as many times as you can
- 4)Work out the mean number of organisms per quadrat within the first sample area
- 5)Repeat steps 1-4 in the second sample area
- Population size
- Might be asked to work this out in the exam
- 1)Work out the mean number of organisms per m sqaure
- 2) Then multiply the mean by the total area of the habitat
- Live in different places because the environment varies
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