Trophic levels
Trophic levels
A trophic level is the feeding position of an organism in a food chain or food web. Producers occupy trophic level 111 because they make biomass using energy captured from the environment.
Step-by-step lessons on Edexcel GCSE Biology 9.2.1 Energy transfer between trophic levels. Each one builds up to exam-style questions. Start with the foundational topics and build up to the higher-tier material.