Question Detail
Question
Which one of the following is the correct sequence of ecosystems in the order of decreasing productivity?
Correct Answer
Option C is the correct answer.
Detailed Explanation
The correct sequence of ecosystems in order of decreasing primary productivity (gross primary productivity in gC/m²/yr) is: Mangroves (very high productivity, ~2000-3000) > Grasslands (moderate productivity, ~500-1500) > Lakes (moderate to low, depending on trophic status, ~100-1500) > Oceans (low productivity over most areas, ~125-200). Mangroves are among the most productive ecosystems, while oceans have low average productivity due to nutrient limitations in open waters.
Hint
Rank these ecosystems based on their typical net primary productivity, considering mangroves as highly productive.