Which of the following is expected to have the highest value ( $g m / m^{2} / y r$ ) in a grassland ecosystem?

Secondary production

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Tertiary production

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Gross production (GP)

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Net production (NP)

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Solution

The correct option is A Gross production (GP)
Gross productivity is the amount of energy trapped in organic matter during a specified interval in produces. Net productivity is the amount of energy trapped in organic matter during a specified interval at a given trophic level, that is less than gross productivity due to the energy lost by the respiration of the organisms at that level
So, the correct answer is 'Gross production (GP)'

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