What is a trophic level?

A trophic level refers to the position of an organism within a food chain. 

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What trophic level are producers?

Trophic level 1.

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What trophic level are primary consumers?

Trophic level 2.

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What trophic level are secondary consumers?

Trophic level 3.

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What trophic level are tertiary consumers?

Trophic level 4.

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What is a herbivore?

A herbivore is an organism that only consumes plants and algae (producers).

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What is a carnivore?

A carnivore is an organism that only consumes animals (consumers). 

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What do the arrows in a food chain represent?

The transfer of energy (or biomass).

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Why are food chains usually no longer than five or six trophic levels?

Only around 10% of the energy and biomass is transferred between each level, so there won't be enough energy or biomass for organisms to exist at higher trophic levels.

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What is a decomposer?

A decomposer is a microorganism that breaks down dead plant and animal matter. This allows nutrients to be recycled. 

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Which types of organisms are most decomposers?

Bacteria and fungi.

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What is a detritivore?

Detritivores are small animals like worms and woodlice that help to break down organic matter into smaller pieces.

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What is an apex predator?

Apex predators are carnivores that eat other carnivores. They exist at the top of a food chain and have no natural predators.

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