Question

Which most often limits the primary productivity of the ecosystem

• A. Solar radiation/light
• B. Oxygen
• C. Consumers
• D. Nitrogen

Answer 1

The correct option is A Solar radiation/light

Of the incident solar radiation, less than 50 percent of it is photosynthetically active radiation (PAR). Plants are only able to capture 2-10 percent of PAR. Therefore solar radiation/light is the limiting factor in the primary productivity of the ecosystem.

So the correct answer is "Solar radiation/light".