Grade 11 Ecology & populations worksheet

What is on the worksheet

1. Supplied fictional records give M = 78 initially marked, C = 51 in a later sample, and R = 42 marked in that sample. Use N ≈ MC/R under the stated assumptions. No animals are to be handled. Round to 3 decimal places if needed.

2. A supplied survey counts 163 plants in 10 non-overlapping quadrats, each 0.5 m². Find the mean density in the sampled area. Round to 3 decimal places if needed. Answer in plants/m².

3. A supplied survey counts 55 plants in 9 non-overlapping quadrats, each 2 m². Find the mean density in the sampled area. Round to 3 decimal places if needed. Answer in plants/m².

4. A supplied survey counts 129 plants in 5 non-overlapping quadrats, each 0.25 m². Find the mean density in the sampled area. Round to 3 decimal places if needed. Answer in plants/m².

5. A supplied survey counts 37 plants in 10 non-overlapping quadrats, each 1 m². Find the mean density in the sampled area. Round to 3 decimal places if needed. Answer in plants/m².

6. A fictional population starts at 189. During one interval: 58 births, 7 arrivals, 13 deaths and 27 departures. Find the final count. Round to 3 decimal places if needed.

7. A supplied survey counts 195 plants in 3 non-overlapping quadrats, each 2 m². Find the mean density in the sampled area. Round to 3 decimal places if needed. Answer in plants/m².

8. A supplied survey counts 92 plants in 5 non-overlapping quadrats, each 1 m². Find the mean density in the sampled area. Round to 3 decimal places if needed. Answer in plants/m².

9. A supplied food-web model transfers 5% of 1466 kJ to the next level. Find transferred energy. The stated efficiency is not a universal ecological constant. Round to 3 decimal places if needed. Answer in kJ.

10. A supplied survey counts 143 plants in 12 non-overlapping quadrats, each 1 m². Find the mean density in the sampled area. Round to 3 decimal places if needed. Answer in plants/m².

11. A fictional population starts at 334. During one interval: 28 births, 30 arrivals, 26 deaths and 9 departures. Find the final count. Round to 3 decimal places if needed.

12. A supplied food-web model transfers 10% of 969 kJ to the next level. Find transferred energy. The stated efficiency is not a universal ecological constant. Round to 3 decimal places if needed. Answer in kJ.

13. A supplied food-web model transfers 23% of 355 kJ to the next level. Find transferred energy. The stated efficiency is not a universal ecological constant. Round to 3 decimal places if needed. Answer in kJ.

14. Supplied fictional records give M = 42 initially marked, C = 76 in a later sample, and R = 24 marked in that sample. Use N ≈ MC/R under the stated assumptions. No animals are to be handled. Round to 3 decimal places if needed.

15. A supplied food-web model transfers 23% of 845 kJ to the next level. Find transferred energy. The stated efficiency is not a universal ecological constant. Round to 3 decimal places if needed. Answer in kJ.

16. A supplied food-web model transfers 25% of 415 kJ to the next level. Find transferred energy. The stated efficiency is not a universal ecological constant. Round to 3 decimal places if needed. Answer in kJ.

17. A supplied food-web model transfers 25% of 1445 kJ to the next level. Find transferred energy. The stated efficiency is not a universal ecological constant. Round to 3 decimal places if needed. Answer in kJ.

18. A fictional population starts at 529. During one interval: 68 births, 12 arrivals, 52 deaths and 30 departures. Find the final count. Round to 3 decimal places if needed.

19. Supplied fictional records give M = 78 initially marked, C = 49 in a later sample, and R = 22 marked in that sample. Use N ≈ MC/R under the stated assumptions. No animals are to be handled. Round to 3 decimal places if needed.

20. Supplied fictional records give M = 32 initially marked, C = 77 in a later sample, and R = 21 marked in that sample. Use N ≈ MC/R under the stated assumptions. No animals are to be handled. Round to 3 decimal places if needed.