Good News From the Coast: The World's Mangroves Are Bouncing Back

Happy Sunday. This week we're handing the good-news microphone to a plant that spends its whole life with wet feet.

Mangroves are those tangled, stilt-rooted trees that grow where the land loses its argument with the sea — along tropical shores, river mouths and muddy deltas. For decades they were written off as one of the planet's most threatened ecosystems, cleared for shrimp farms, timber and seaside development. So it's genuinely lovely to be able to tell you this: they're coming back.

The turning point

A new study published in the journal Science in June 2026, led by Tulane University with Dr Thomas Worthington of the University of Cambridge, looked at four full decades of satellite images of the world's coastlines. The verdict? Mangrove forests are no longer in net decline. Globally, they're growing again.

The numbers tell a quietly hopeful story. Between the 1980s and 2010, the world lost nearly 2,900 square kilometres of mangroves. But over the last sixteen years, gains have outpaced losses — so much so that by 2023 the total four-decade loss had shrunk to just about 1%, far less than anyone had feared.

“After decades of loss, we're finally seeing a global turning point for mangroves,” said lead author Dr Zhen Zhang. “This highlights their strong resilience and their potential as a powerful nature-based solution for climate mitigation and coastal protection.”

Why a muddy forest is such a big deal

Mangroves punch well above their weight. A healthy belt of them does a remarkable amount of quiet work:

• They guard the coast. Their dense roots break the force of storm surges and waves, sheltering the communities behind them.

• They're carbon superheroes. Mangroves lock away enormous amounts of “blue carbon” in their waterlogged soils — often more, acre for acre, than dry-land forests.

• They're a nursery for the sea. Fish, crabs and prawns shelter and breed among the roots, feeding coastal fisheries and the families who depend on them.

And the recovery isn't only about area. Researchers found that many existing forests are growing denser and healthier, with closed-canopy mangroves — the kind that store the most carbon — expanding across the globe.

How it's happening

Part of the comeback is deliberate: restoration projects and stronger conservation rules are paying off. But nature is doing plenty of the work on her own. Mangroves are quietly recolonising abandoned aquaculture ponds and marching out onto freshly formed mudflats, especially in river deltas where sediment builds the perfect nursery bed. Give them half a chance, and they take it.

A gentle note of realism

None of this is a signal to relax. New forests are young and can't yet do everything a mature one does, and in some places clearing still goes on. A sharp freeze wiped out swathes of Texan mangroves in 2021, a reminder of how fast progress can reverse. As Dr Zhang put it, the most immediate and effective way to protect mangroves is to stop deforestation.

What it means for your Sunday

We don't have mangroves here in the Mediterranean, but we have our own underwater forests — the Posidonia seagrass meadows that hug Malta's coast and do the very same job of storing carbon and sheltering sea life. The lesson travels: coastlines can heal when we let them.

So take the win. This is what happens when protection, restraint and nature's own stubbornness pull in the same direction. You can be part of that story in small ways — supporting a coastal or ocean conservation charity, keeping our own shorelines litter-free on beach days, and choosing seafood that's caught with the sea's health in mind.

Progress is rarely loud. Sometimes it looks like a quiet green tide creeping back up a muddy shore, root by root, doing the world an enormous favour. Have a wonderful Sunday.