Question
In an ecosystem if the Net Primary Productivity (NPP) of first trophic level is 100 x ( kcal m ^ -2 ) yr ^ -1 , what would be the GPP (Gross Primary Productivity) of the third trophic level of the same ecosystem?
NEET
Botany
Ecosystem
2024
NEET 2024
NEET Botany Question (2024) — Solution
Options
- A. x ( kcal m ^ -2 ) yr ^ -1
- B. 10 x ( kcal m ^ -2 ) yr ^ -1
- C. 100 x 3 x ( kcal m ^ -2 ) yr ^ -1
- D. x 10 ( kcal m ^ -2 ) yr ^ -1
Answer
B. 10 x ( kcal m ^ -2 ) yr ^ -1
Step-by-step solution
NPP at first trophic level would be the GPP for second trophic level. NPP at second trophic level would be GPP for third trophic level. Therefore, 100 x ( kcal / m ^2 / yr . ) would be GPP at second trophic level and 100 x 10 \% ( kcal / m ^2 / yr ) i.e., 10 x ( kcal / m ^2 / yr ) energy would be GPP at third trophic level.
Related: Botany — Ecosystem · All PYQ Banks