Q. Which of the following is the unit of productivity of an Ecosystem?
A) gm$^{-2}$
B) KCal m$^{-2}$
C) KCal m$^{-3}$
D) (KCal m$^{-2}$)yr$^{-1}$
Explanation
[Solution by Claude - not from source] Productivity is a rate (biomass or energy per unit area per unit time), so $(kcal\ m^{-2})\,yr^{-1}$ or $g\ m^{-2}\,yr^{-1}$. Answer (4), as in the answer key.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.