GyanGram
ATTEMPT · ENVIRONMENT · PRELIMS 2013
Which one of the following is the correct sequence of ecosystems in the order of decreasing productivity?
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Which one of the following is the correct sequence of ecosystems in the order of decreasing productivity?
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• Correct Answer: C
• Net primary productivity decreases as: Mangroves (highest: 2,000–3,000 g/m²/yr) > Grasslands > Lakes > Oceans (lowest per unit area: biological desert due to nutrient limitation).
• Oceans contribute ~50% of global NPP by area but have the lowest productivity per unit area.
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