JAMB - Biology (2002 - No. 15)
In a field experiment, the frequency of water leaf was observed to be 48 after 20 tosses of a 2m\(^2\) quadrat. What is the density of the plants in the field?
1.2 per m2
2.4 per m2
4.8 per m2
9.6 per m2
Explication
The formula for plant population density is plant population = density × area. You can also calculate plant population density by dividing the number of plants by the area they cover.
Given:
Plant population(Frequency of water leaf) = 48
Total area sampled = 20 tosses x 2m\(^2\) = 40 m\(^2\)
Density = \(\frac{frequency}{total area sampled}\)
= \(\frac{48}{40}\)
= 1.2 per m\(^2\)