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How does ecological restoration repair ecosystems damaged by human activities?
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ecological disturbance
Aerial view of the remains of trees on a hillside after a forest fire.
Ecological restoration is the process of repairing ecosystems that have been degraded or destroyed by human activities, such as agriculture, mining, or the introduction of invasive species. Restorationists apply ecological principles to return these sites to a state closely resembling their original, unaltered condition.12
The approach generally falls into two categories:
- Passive Restoration: In cases of mild degradation, specialists remove the source of the disturbance (such as halting tillage or livestock grazing) and allow the site to recover naturally through ecological succession.3
- Active Restoration: When an ecosystem has passed a threshold of damage, specialists must intervene to accelerate recovery. This includes:3
- Soil and Water Rehabilitation: Restoring physical, chemical, and biological characteristics through methods like pH adjustment, erosion control, and land stabilization.3
- Revegetation: Selecting appropriate native seeds or seedlings to rebuild the plant community, often prioritizing high genetic diversity to improve survival.3
- Process Restoration: Reestablishing natural disturbance regimes, such as prescribed fire or flooding, which are often essential for maintaining ecosystem health.34
Successful restoration requires identifying the correct species mix and monitoring progress through adaptive management to ensure long-term sustainability.34