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Learning objective

Calculate gross production, net production and respiratory loss where data are provided.

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Topic

Energy transfers official content

Subtopic

Energy and ecosystems

Aqa A Level BiologyEnergy transfers in and between organisms

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Quick explanation

Calculate gross production, net production and respiratory loss where data are provided

  • This point belongs to Energy transfers official content, especially Energy and ecosystems.
  • You need to be able to calculate gross production, net production and respiratory loss where data are provided.
  • The key ideas to know are net production and gross production.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

net productiongross production

Why it matters

This objective helps connect Energy and ecosystems to exam-style questions, flashcards, and revision notes for Energy transfers official content.

Quick student answer

What is the formula to calculate net primary production (NPP)?

Direct answer

NPP = Gross Primary Production (GPP) - Respiration Loss

Key terms

  • Trophic Level: The position an organism occupies in a food chain, which determines its role in the transfer of energy and nutrients.
  • Energy Efficiency: The ratio of energy transferred from one trophic level to the next, often expressed as a percentage.

Common trap

Confusing GPP and NPP: Remember that GPP is the total energy captured, while NPP is what remains after respiration losses.

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