In Spain's threatened wetlands, a new alliance of amphibious machines and grazing cows is restoring balance and capturing carbon. The LIFE Wetlands4Climate project is redefining how these fragile ecosystems can help mitigate climate change while supporting biodiversity.
Early morning in Prat de Cabanes-Torreblanca, a massive amphibious machine pushes into the reeds. Birds scatter. The marsh changes shape. This is not routine maintenance. It is a direct attempt to save Spain's Mediterranean wetlands from years of neglect and to turn them into carbon traps.
The LIFE Wetlands4Climate project, run by Fundación Global Nature, is leading this charge. Over four years, the team has tried out targeted actions: mowing with amphibious machines, letting cows graze, and managing the soil. The goal is simple. Can these steps help wetlands soak up more greenhouse gases? The risk is real. Wetlands store huge amounts of carbon, but if they break down, they can quickly release it back into the air. That speeds up climate change. El País reports the project covered ten wetlands across the Iberian Peninsula. The team compared managed and unmanaged plots, tracking plants, soil, and gas exchanges. The scale is big. The science is careful. But the final, independent results are still pending.
The main ecological risk is not only carbon loss, but also increased methane emissions when excess vegetation and organic matter reduce oxygen in the water.
Carlos Rochera from the Instituto Cavanilles de Biodiversidad y Biología Evolutiva at the Universitat de València puts it bluntly: "A wetland that degrades can lose in a short time a part of the carbon it has collected so slowly, returning it to the atmosphere as greenhouse gases." Centuries of slow carbon savings can vanish in one bad season.
The project’s methods break with tradition. Amphibious machines slice through thick carrizo reeds. They leave behind a patchwork of open water and plants. More birds arrive. The cut reeds are dried, crushed, and reused as bedding or feed. Nothing is wasted. In muddy spots where machines cannot go, local farmers like Miguel Marín use tractors to churn the topsoil. This old method, called fangueo, keeps the marsh open and lively. El País notes the project only removes extra vegetation. The aim is balance—open water, reed beds, and other habitats—not total clearance.
The real shift happens underground. The team tracks soil and gas changes with scientific tools. Their data shows managed plots pull in more carbon than untouched ones. The method now waits for Spain’s Ministry for Ecological Transition to certify it. If approved, companies could one day pay for wetland restoration to offset their emissions, just as they do with forests. But El País points out that official certification is still pending. For now, claims about carbon capture remain provisional.
Managing the hydrological regime—regulating water inflow and outflow—is a distinct part of the climate strategy, not only supporting the ecosystem but also helping to mitigate the impact of increasingly frequent extreme rainfall events.
Some actions are far from gentle. In Marjal del Moro, a protected wetland between Puzol and Sagunto, bulldozers have scraped off the top ten centimeters of soil in certain areas. This drastic step cuts down on organic buildup. If left, that buildup can choke oxygen, spark methane, and throw the ecosystem off balance. The removed soil is tested and reused as fertilizer. Even the toughest moves are weighed against nature’s needs.
Elsewhere, the quietest workers are Fran Panella’s cows. They graze the wide marshes of Pego-Oliva. The cows act as living mowers, keeping plants young and boosting CO2 capture. GPS collars keep them in the right spots. When the ground risks getting too packed in late September, the cows move to higher ground. This also helps prevent wildfires.
Water is always the wild card. In Marjal de Pego-Oliva, natural springs called ullals feed the marsh. But summer brings a fight for water. Rice fields and holiday homes want more. Park managers juggle water flows to keep the ecosystem alive and to soften the blow of extreme weather. The marsh becomes a sponge, soaking up floods.
These wetlands have always been shaped by people. Once, they were seen as mosquito-ridden wastelands. They were drained, farmed, and nearly lost to industry. In the 1980s, public outcry stopped Marjal del Moro from turning into a steel plant. That saved it for wildlife and for climate defense.
The threats are not gone. Modern industrial parks now press against these fragile areas. They divert water and squeeze the wetlands’ lifelines. Ana Pons, who leads the Centro de Educación Ambiental de la Comunidad Valenciana, says a wetland’s health depends as much on what surrounds it as on its core. A new warehouse or canal can tip the scales.
The project has earned recognition. LIFE Wetlands4Climate won the LIFE Award 2026 for Climate Action from the European Commission. The award honors its mix of fieldwork and science. But the real test is whether these methods can spread and get funding. Can Spain’s wetlands go from forgotten corners to key players in the climate fight?
Spain’s wetlands are not just relics. With machines, cows, and careful hands, they are being remade as living landscapes for both nature and people. The message is clear. The future of climate action in Spain may depend on bold, unusual solutions—and on seeing the hidden value in these vital places. As more evidence comes in, it gets harder to ignore what restored wetlands can do. They capture carbon. They build resilience. They shape a better future for everyone.
