A student investigated the distribution of wood anemone plants in different areas of a coniferous forest.
The student measured the light intensity and counted the number of plants in several 1 m2 quadrats in each area. The results are shown in the table below.
| Study area | Mean light intensity in lux | Mean number of wood anemone plants per m2\text{m}^2m2 |
|---|---|---|
| Area P | 1800 | 4.2 |
| Area Q | 1450 | 3.1 |
| Area R | 1100 | 2.3 |
| Area S | 750 | 1.4 |
| Area T | 400 | 0.5 |
| Area U | 200 | 0.1 |
Explain the effect of light intensity on the number of wood anemone plants per m2\text{m}^2m2.
