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What eventually happens to the energy that is passed from one trophic level to the next in a food?

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GCSE

Food chains

Food chains show the feeding relationships between living things. Pyramids of biomass reveal the mass of living material at each stage in a chain.

Part of

Biology (Single Science)

Ecosystems and habitats

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Energy transfer

Energy is transferred along food chains from one trophic level to the next. However, the amount of available energy decreases from one trophic level to the next.

Energy transfer

A pyramid of biomass

A pyramid of biomass

A pyramid of biomass

A pyramid of biomass

Energy loss

In a food chain only around 10 per cent of the energy is passed on to the next trophic level. The rest of the energy passes out of the food chain in a number of ways:

  • it is used as heat energy
  • it is used for life processes (eg movement)
  • faeces and remains are passed to decomposers

Less energy is transferred at each level of the food chain so the biomass gets smaller. As a result, there are usually fewer than five trophic levels in food chains.

Percentage efficiency of energy transfer

The percentage efficiency of energy transfer between trophic levels can be calculated using the equation:

curriculum-key-fact

energy transferred to next level ÷ total energy in × 100

Worked example

Work out the percentage efficiency of energy transfer between producers and primary consumers in the example.

Question

Calculate the total energy that came into the level of the food chain.

4500 kJ + 500 kJ = 5000 kJ

Question

Identify how much energy is transferred to the next level.

500 kJ

Question

Calculate the efficiency of this transfer using the equation.

energy transferred to next level ÷ total energy in × 100

500 kJ ÷ 5000 kJ × 100 = 10%

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What eventually happens to the energy that is passed from one trophic level to the next in a food chain?

energy flow and trophic levels - Students | Britannica Kids | Homework Help. The amount of energy at each trophic level decreases as it moves through an ecosystem. As little as 10 percent of the energy at any trophic level is transferred to the next level; the rest is lost largely through metabolic processes as heat.

What eventually happens to the energy that is passed from one trophic level to the next in a food chain quizlet?

What eventually happens to the energy passed from one trophic level to the next in a food chain? It is dissipated into the atmosphere. Which pyramid illustrates that at each successive trophic level there is a decreasing amount of energy available?

How is energy passed from one trophic level to the next?

Primary producers use energy from the sun to produce their own food in the form of glucose, and then primary producers are eaten by primary consumers who are in turn eaten by secondary consumers, and so on, so that energy flows from one trophic level, or level of the food chain, to the next.

What happens to the energy that is passed to the primary consumer?

As producers are consumed, roughly 10% of the energy at the producer level is passed on to the next level (primary consumers). The other 90% is used for life processes, such as photosynthesis, respiration, reproduction, digestion; and ultimately transformed into heat energy before the organism is ever consumed.

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