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Ecosystem question

2013 · Q46
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Ecosystem question

2013 · Q46

NEETBiologyEcosystemMCQ+4 / −1
Secondary productivity is rate of formation of new organic matter by :
  1. A
    Parasite
  2. B
    Decomposer
  3. C
    Producer
  4. D
    Consumers
View written solutionFree

Correct answer: D

The rate of resynthesis of organic matter by the consumers is known as secondary productivity . It depends upon the loss while transferring energy containing organic matter from the previous trophic level plus the consumption due to respiration and predation. Respiration loss is about 20% for autotrophs, 30% for herbivores and upto 60% in case of carnivores. Therefore net productivity decreases with each trophic level.

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