Trophic Levels in an Ecosystem

1) The following image represents a typical food chain in the Arctic. Give the source of energy of this food chain 1 Marks

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2) Identify which species in the food chain is an herbivore 1 Marks

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3) State the trophic level in which the silverfish belong to 1 Marks

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4) The energy input into this food chain is 26000 kJ per m2 per year. Just 3 kJ per m2 per year of that energy is transferred from the leopard seal to the orca. Calculate the percentage of energy absorbed by the plankton which is transferred to the orca. Give your answer to 2 significant figures 3 Marks

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5) Explain, as fully as you can, what happens to the remaining percentage of the energy absorbed by the plankton 6 Marks

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6) Scientists estimated the biomass of the silverfish, leopard seals and orcas in a given area. Complete the table below to show their findings 2 Marks

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7) The biomass of the orca population is much less than the biomass of the leopard seal population. Give two reasons why 2 Marks

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