In an ecological study, a grasshopper population and that of crows was estimated in a certain grassland area over a period of one year. the results are as shown in the table below.
Months | J | F | M | A | M | J | J | A | S | O | N | D |
Number of adult Grasshoppers x 102 | 90 | 20 | 11 | 25 | 2500 | 1652 | 120 | 15 | 10 | 35 | 192 | 456 |
Number of crows | 4 | 2 | 0 | 1 | 8 | 22 | 7 | 2 | 1 | 1 | 5 | 15 |
Amount of rainfall | 20 | 0 | 55 | 350 | 520 | 350 | 12 | 10 | 25 | 190 | 256 | 350 |
- What is the relationship between the rainfall and grasshopper population?
- Account for the relationship stated in (1) above.
- Explain the relationship between the grasshopper population and that of the crows.
- If the data was used in the construction of pyramid of numbers, what would be the trophic of;
- Grasshoppers -
- Crows -
- The grass in the study area
- If the area studied was one square kilometer, state:
- one method that could have been used to estimate the crow population.
- one method that could have been used to estimate the grasshopper population.
- Suggest what would happen if a predator for grasshoppers entered the study area.