Illustrative scenario
What if Madagascar took a scaled approach to “Protected area expansion”?
Starting point · documented
Madagascar's unique wildlife depends on forests that have been extensively cleared.
The intervention · documented
Protected area expansion
Madagascar significantly expanded its protected area network in the 2000s and 2010s.
Secures key habitats where management is effective.
Schematic direction of change
Halting loss can happen faster than restoring what has been lost; ecosystems recover over years to decades.
Causes this could address
This intervention works indirectly — it does not map onto a single documented cause, but supports the wider response to the issue.
Impacts that could ease
- Extinction riskMany lemurs and other endemic species face a high risk of extinction.
- Soil erosionCleared hillsides lose soil, silting rivers and coastal waters.
Wider reach at higher intensity is an assumption of this illustration.
How change might unfold
Near term
Rates of clearing or degradation can slow where protection is enforced.
Medium term
Restored areas begin to function, supporting some species and services.
Long term
Mature habitat and biodiversity return slowly, and some losses are irreversible.
Faded stages are less likely to be reached at scaled intensity.
What this would not change
Extinctions cannot be reversed, and market, governance and climate pressures continue outside protected areas.
What it depends on
- Sustained funding and institutional capacity
- Consistent enforcement and monitoring
- Local stakeholder support
- Participation of affected communities
ILLUSTRATIVE SCENARIO — NOT A SCIENTIFIC PREDICTION. Built from documented causes, impacts and solutions plus general qualitative patterns. It contains no modelled numbers.