(I)GCSE Topic 4.3 Quadrates Samples

Use of Quadrates as a Technique for sampling the distribution of organisms in their habitats:
- Use the Quadrate technique to sample the population (Daisy) in a area.

The sample has to be:
- picked at random so there is no Bias.
- representative - has to be a large amount so the estimate of the population has to be as close to the true population as possible.
- The bigger the number of representative sample, the better.
- 10 quadrates / 10% of the actual area

Estimate the population of (Daisys) in the field:
Compare te number of (Daisys) in two or more different areas:

Add up the number of (Daisys) per m2, divide by the number of quadrates, = number of (Daisys) per m2