Biology GCSE
Trophic levels
What Trophic levels means in Biology GCSE, as defined for AQA, OCR.
Definitions of Trophic levels
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Reference: AQA
Represented by numbers, starting at level 1 with plants and algae, so that feeding positions can be compared across different food chains.
Feeding positions along a food chain that are numbered subsequently according to how far the organism is along the food chain.
The levels in a food chain, with producers occupying the first trophic level and supplying energy to all other organisms.
Producers occupy the first trophic level, and a consumer may occupy different trophic levels in different food chains.
The stages of a food chain, with producers forming the wide base and primary consumers the next bar, and so on.
The levels of an ecosystem at which organisms feed, with producers forming trophic level 1.
Topics that use Trophic levels
- Levels of organisation (AQA GCSE)
- Transfer of biomass (AQA GCSE)
- Trophic levels (AQA GCSE)
- Photosynthesis (OCR GCSE)
Related terms
- Producers
- Biomass
- Consumers
- Energy transfer
- food web
- Photosynthesis
- Trophic level
- Absorption of soluble nutrients
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