Inland Ghost Forests Are Spreading Far From the Sea

Inland Ghost Forests are no longer just a coastal story. A nationwide aerial survey of American woodlands has found vast stands of dead trees far from the ocean, around expanding freshwater lakes and in rain-soaked inland wetlands, according to New Scientist, which reported on new research from the University of Virginia.

Ghost forests are stands of pale, leafless trunks left behind when rising water drowns roots or poisons soil with salt. Until now, most of the attention has gone to the Atlantic shoreline, where seawater creeping inland has stripped whole woodlands. The new survey shows the die-off reaches much further than the tide line, and that shift could change how much carbon scientists believe the country's forests still hold. The full account is in New Scientist's report on the rising-water survey.

Henry Yeung and colleagues at the Virginia university mapped dead trees using aerial imagery from a federal farm-imagery program, covering images captured between 2012 and 2023. They scanned land within ten kilometres of the Pacific, Gulf and Atlantic coasts, as well as along American shorelines of the big freshwater lakes, down to a resolution of about one square metre. In total, they counted more than two hundred and sixty million dead trees, with over half of the deaths concentrated in just a tenth of the mapped forest.

The surprise was inland

Tree deaths tripled in low-lying coastal forests over the study window, where flooding met rising salt levels. Yet deaths also doubled around expanding freshwater lakes and in inland wetlands that have seen heavier rainfall, according to the magazine's account of the research. Those inland hotspots sat in high-elevation wetlands far from salty water, a pattern the researchers had not expected to find at such scale.

The finding extends a grim record already documented on the Atlantic coast. North Carolina is thought to have lost about a fifth of its coastal forest between 1985 and 2021 as waterlogged soil and higher salt levels took hold, and earlier mapping work had already shown how patchy the damage could be. What the nationwide view adds is proof that the same drowning process is under way wherever water is rising or gathering, salt or no salt. Readers who follow coastal restoration will find a related story in how calm-water windows could save mangrove forests, where local water conditions decide whether new planting survives.

Why it matters beyond the treeline

Forests are among the largest carbon sinks on land, pulling carbon dioxide from the air and locking it into wood and soil. If large areas counted as healthy forest are in fact standing dead, carbon budgets built on those forests may be too optimistic, and the survey's authors say the finding may force a re-evaluation of how much carbon woodlands still store. That matters for climate plans that treat existing forests as a reliable sponge for emissions.

The change is also visible at ground level. As saltwater turns hardwood stands into marsh, the landscape shifts from a patchwork of habitats to a single salt-marsh expanse, according to Yale E360 reporting from Florida's Gulf coast, where researchers have watched cedar and oak hammocks give way to marsh grass. That transition squeezes out wading birds, turtles and snakes that depended on the wooded islands. A similar community-scale story plays out closer to home in community gardens logging a record harvest season, where local green space keeps proving its worth to the people who tend it.

What comes next is a harder look at which forests can still be saved and which are already gone. Mapping dead trees from the air gives land managers a far sharper picture than ground surveys alone, and it lets them spot trouble in places no one thought to check. For coastal towns, lake communities and anyone counting on forests to keep absorbing carbon, the message is plain: the water is already rewriting the map, and the dead trees are the evidence. More detail on the earlier coastal mapping work is available from the University of Virginia's environmental institute, which describes how machine learning counted dead trees along the east coast.

Clean-energy fixes for homes are part of the same adaptation puzzle, as shown by balcony solar giving renters their own power plant. The Inland Ghost Forests survey does not offer a quick repair, but it does give planners, scientists and residents a clearer view of what is at stake while there is still forest left to defend.