Question

Which of the following ecosystem has the highest gross primary productivity?

• A. Grassland
• B. Coral reef
• C. Mangroves
• D. Rain forest

Answer 1

The correct option is B Coral reef

Primary productivity is the amount of energy (measured in kcal per square meter per year) or biomass (measured in grams per square meter per year), accumulated in green plants per unit area per unit time. It depends on the availability of solar radiations, optimum temperature, soil moisture and biogenetic nutrients.

Coral reef ecosystem has highest gross primary productivity due to availability of large number of autotrophs per unit area.