C4.2.14—Restrictions on trophic levels
Restrictions on trophic levels explains how energy flow, matter cycling or carbon transfer is represented, measured or limited within ecosystems.
- Syllabus
- First assessment 2025
- Objective
- C4.2.14
- Level
- HL
Concept essentials
- Restrictions on trophic levels must be linked to the correct source, store, transfer or loss process.
- The evidence for restrictions on trophic levels depends on distinguishing energy flow from matter cycling.
- Restrictions on trophic levels is clearer when arrows, units and trophic positions match the biological process.
- Data or diagrams for restrictions on trophic levels need interpretation as ecosystem transfer evidence.
ConceptIB Biology HL