In an ecosystem if the Net Primary Productivity ($NPP$) of first trophic level is $100 \times\left(\mathrm{kcal} \mathrm{m}^{-2}\right) \mathrm{yr}^{-1}$, what would be the $GPP$ (Gross Primary Productivity) of the third trophic level of the same ecosystem?
- A$x\left(\mathrm{kcal} \mathrm{m}^{-2}\right) \mathrm{yr}^{-1}$
- ✓$10 x\left(\mathrm{kcal} \mathrm{m}^{-2}\right) \mathrm{yr}^{-1}$
- C$\frac{100 x}{3 x}\left(\mathrm{kcal} \mathrm{m}^{-2}\right) \mathrm{yr}^{-1}$
- D$\frac{x}{10}\left(\mathrm{kcal} \mathrm{m}^{-2}\right) \mathrm{yr}^{-1}$
Answer: B.
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