On a mist-laced April morning along the shores of Martha’s Vineyard, the salt marsh doesn’t just sit quietly—it breathes. With every tidal pulse, it inhales seawater and exhales resilience, filtering runoff, sheltering juvenile fish, and buffering the island from the Atlantic’s restless moods. But this ancient rhythm is fraying. As sea levels climb and storms intensify, these vital wetlands are being squeezed between rising water and rigid human infrastructure—a phenomenon scientists call “coastal squeeze.” What was once a background detail in environmental reports has become a frontline crisis, one that threatens not just biodiversity but the extremely foundations of coastal resilience.
This isn’t merely an ecological concern. Salt marshes are among the most productive ecosystems on Earth, sequestering carbon at rates up to 50 times greater than tropical forests per unit area. They also serve as natural seawalls, reducing wave energy by as much as 50% during storm surges. Yet despite their outsized role in climate adaptation, they remain chronically overlooked in policy and funding priorities—especially when compared to more visible infrastructure like seawalls or levees. The Vineyard Gazette’s recent reporting highlights the pressure these ecosystems face, but it doesn’t fully confront the systemic blind spots that allow their degradation to continue unchecked.
The real story isn’t just that marshes are disappearing—it’s that we’re losing them at a time when we need them most. Since the 1800s, the United States has lost over 50% of its historic salt marsh acreage, with the Northeast experiencing some of the steepest declines due to dense coastal development. On Martha’s Vineyard alone, marshes have retreated by nearly 30% in the last four decades, according to data from the Woods Hole Oceanographic Institution. What’s alarming isn’t just the rate of loss, but the feedback loop it creates: as marshes vanish, coastal communities become more vulnerable to flooding, which in turn triggers calls for hard engineering solutions that further destroy the very wetlands that could have prevented the damage.
This dynamic is playing out in real time. In 2023, a nor’easter breached outdated seawalls in Chilmark, causing millions in damages—damage that modeling from the University of Rhode Island suggests could have been reduced by 40% had adjacent marshes been intact and elevated. Yet instead of investing in marsh restoration, town meetings are often dominated by debates over seawall height and rock revetments—solutions that are expensive, ecologically disruptive, and ultimately temporary.
“We keep treating symptoms while ignoring the cure,” said Dr. Loretta Fernández, a coastal biogeochemist at the Woods Hole Research Center, in a recent interview. “Salt marshes aren’t just habitat—they’re infrastructure. And right now, we’re letting them drown because we refuse to observe them as essential.”
The economic calculus is shifting, but slowly. A 2024 study by the National Oceanic and Atmospheric Administration (NOAA) found that every dollar invested in salt marsh restoration yields up to $7 in avoided flood damages over 50 years—a return that outperforms most gray infrastructure projects. Yet federal funding for coastal resilience still allocates less than 15% to nature-based solutions, with the bulk going to concrete and steel. Even the Inflation Reduction Act, while historic in its climate investments, directs only a fraction of its coastal resilience grants toward wetland recovery.
There are signs of change, however. On Nantucket, a pilot project led by the Massachusetts Audubon Society is using thin-layer sediment spraying to elevate marshes in pace with sea level rise—a technique showing promise in early trials. Similarly, the Wampanoag Tribe of Gay Head (Aquinnah) has revived traditional ecological knowledge to guide marsh restoration, planting native cordgrass in patterns that mimic pre-colonial hydrology. These efforts aren’t just scientific—they’re acts of cultural reclamation.
“We didn’t lose these marshes by accident,” said Cheryl Andrews-Maltais, Chairwoman of the Wampanoag Tribe, during a 2023 panel at the Martha’s Vineyard Museum. “We lost them because we stopped listening to the land. Now we’re learning to listen again.”
The path forward requires more than science—it demands a shift in values. We must stop viewing marshes as passive scenery and start recognizing them as active defenders of our coastlines. That means updating zoning laws to allow for marsh migration, incentivizing living shorelines over seawalls, and directing climate adaptation funds toward projects that work with nature, not against it.
As I walked the boardwalk at Felix Neck Wildlife Sanctuary last week, watching egrets stalk the shallows and fiddler crabs scuttle into their burrows, I was reminded that resilience isn’t always loud. Sometimes, it’s quiet. Sometimes, it’s rooted in the mud. And sometimes, it’s waiting for us to notice—before it’s too late.
What if, instead of building higher walls, we learned to rise with the tide?
