The diagram shows the distribution of two plant species in a small area of a field.
An ecology student uses a square metal frame to help record the plants in this area.
Name the square frame apparatus used by the student to study the distribution of these plants.
The student records the number of plants in all of the 1 m2\text{ m}^2 m2 squares marked out in the diagram.
Complete the table below to show the number of plants of each species and the average (mean) number of plants per m2\text{m}^2m2.
| Species | Number of plants | Average number of plants per m2\text{m}^2m2 |
|---|---|---|
| plantain | 8 | 0.40 |
| daisy |
Frequency is another measure that can be used to study distribution. Frequency is defined as the number of sampled squares that contain at least one plant of the species being counted. This value can also be expressed as a percentage of the total number of squares sampled.
Complete the table below by giving the frequency and percentage of the total number of squares sampled for daisy.
| Species | Frequency | Percentage (%) |
|---|---|---|
| plantain | 7 | 35 |
| daisy |
Describe how the student could estimate the population size of daisy in a very large field.