2.1.30 (HL)—Human impacts on species
- Syllabus
- First assessment 2026
- Objective
- 2.1.30
- Level
- HL
Predict disturbance response by combining which population is affected, what conditions it needs and how quickly its life history can replace losses.
Trace disturbance → niche mismatch or loss → reproduction/survival response → recovery speed. Protecting one habitat feature may miss timing or food interactions.
Warming advances caterpillar emergence before a migratory bird breeds; a late-maturing bird then loses food synchrony and recovers slowly.
No; monitor timing and food interactions as well as space.
A habitat can remain while niche conditions or interactions become unsuitable.