How this is tested: On Paper 1A (multiple choice) you are asked to identify an action that counts as rewilding or that minimises biodiversity loss (rewilding a degraded ecosystem).
Paper 2: On Paper 2 a 2-mark Outline question can ask you to give rewilding methods that restore natural processes — and may say other than reintroducing a keystone species, so you must know more than one method.
IB-style question — outline rewilding methods
A nature charity is rewilding a degraded river valley. Outline two rewilding methods, other than reintroducing a keystone species, that could help restore its natural ecosystem processes. [2]
How to score both marks
- Pick methods that restore a NATURAL PROCESS, not a single species. The question rules out the keystone reintroduction, so name methods that bring back grazing, water flow, native plants or connectivity.
- Method 1 — restore natural water flow. Remove old drains or artificial banks so the river can flood the valley naturally, recreating wetland habitat.
- Method 2 — let native vegetation return. Stop intensive farming/planting and allow native plants to recolonise, rebuilding the plant community that supports the food web.
- Answer the command term (Outline): Two valid methods are restoring natural water flow (re-flooding) and allowing native vegetation to return — each restores a natural process so the ecosystem can sustain itself. (1 mark per correct method.)
Final answer
Any two of: restore natural water flow / re-flooding; allow native vegetation to return; re-establish natural grazing by herbivores; reconnect habitats with corridors; remove human controls (fencing, culling) so the system self-regulates. (Not the keystone reintroduction, which is excluded.)
What a 2-mark answer looks like: Two different methods, each clearly restoring a natural process — for example re-flooding the valley and letting native plants return.
Listing two versions of the same idea, or naming the excluded keystone reintroduction, would only score once or not at all.
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