17/05/2026
We're good at counting mangroves after they're gone. What if we could spot the ones about to disappear? 🤔
That's the question behind the Mangrove Threat Index - a new tool from Scripps Institution of Oceanography and the Centro para la Biodiversidad Marina y la Conservación that scores individual mangrove patches by their risk of degradation.
📊The method is refreshingly simple:
- Using satellite imagery, researchers measure the distance of a mangrove patch to the nearest roads, settlements, and farmland.
- Those proximities are then combined into a single score from 0 to 1 - the closer the human pressure, the higher the risk.
🚩The results are striking:
- Of the patches flagged as medium-high or high risk in 2010, 78% had measurably degraded by 2020.
- Each unit increase in the index meant a 58% greater likelihood of loss.
🇲🇽The index is already guiding a community-led restoration effort in La Paz, Mexico. And because it relies on accessible data, local authorities can apply it without specialized expertise.
As lead author Valentina Platzgummer explains, mangroves take decades to recover once degraded, so we need tools that let us act early.
We hope this meaningful shift - from reporting loss to preventing it - takes root in many other communities.
📑 Read the full study in Frontiers in Ecology and the Environment: https://phys.org/news/2026-04-metric-mangroves.html
