IB ESS HL 2.2.11 Food Chains and Trophic Levels Question Bank
Interpret trophic levels and energy movement through food chains.
- Syllabus
- First assessment 2026
- Course
- ESS HL
- Level
- HL
Exam points
- identify the ecological process or energy relationship
- apply the correct thermodynamic, productivity or trophic concept
- justify the conclusion from evidence and system boundary
2.2.11—Food chains and trophic levels question 1
Figure A simplified food web in a kelp forest ecosystem
Figure Kelp forest ecosystems with and without the presence of sea otters
The arrows indicate the flow of carbon between the atmosphere and the carbon stored in kelp.
State the trophic level of sea urchins in the kelp forest ecosystem shown in Figure.
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