# Distribution of organism

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• Created by: Aleena
• Created on: 02-01-13 17:20
Organisms live in different places because the...
environment varies
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What is the distribution of an organism?
Where an organism is found.
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Where the organism is found is affected by...
environmental factors
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What are the environmental factors?
The Temperature; availability of water, oxygen, carbon dioxide, nutrients and light
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An organism might be more common in one are of their habitat than the other. This is becuase of the...
environmental factors
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You can collect environmental data by...
measure how common an organism is in two sample areas (e.g. using quadrats) an dcompare them You can also study how distribution changes across an area e.g. by placing quadrats along a transect.
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To find the mean:
total number of organisms divided by number of quadrats used. You then compare the means of both samples.
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To work out the population size of an organism in one sample area:
work out the mean number of organism per m2. Then multiply the mean by the total area of the habitat .
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For example:
If the area of a open field is 800m2 and there are 22 daisies per m2. Then the size of the daisy population is 22 x 800 = 17600
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How do you measure the distribution of organism using a transect...
Mark out a line in the area you what to studying using a tape measure. Then collect data along that line. You can do this by just counting all the organisms.
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## Other cards in this set

### Card 2

#### Front

Where an organism is found.

#### Back

What is the distribution of an organism?

### Card 3

#### Front

environmental factors

### Card 4

#### Front

The Temperature; availability of water, oxygen, carbon dioxide, nutrients and light

### Card 5

#### Front

environmental factors