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Biology · Unit 3 · Functioning ecosystems and succession · Functioning ecosystems and succession

Analyse food chains, energy flow diagrams and ecological pyramids to determine - efficiencies of energy and biomass transfer - gross and net productivity - loss of energy through radiation, reflection and absorption.

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Question 1

An energy flow diagram shows that herbivores receive 14,000 kJ m⁻² year⁻¹ from producers, but only 2,100 kJ m⁻² year⁻¹ is transferred to carnivores. Calculate the percentage efficiency of energy transfer from herbivores to carnivores.

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Analyse ecological data (e.g. food webs, population data) to - identify keystone species - infer species interactions - predict the outcomes of removing species from an ecosystem.
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