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The Hudson River Estuary marshes have been increasing in size, showing a remarkable resilience. But that’s not the only surprise: the marshes also appear to have been created by accident.
The arrival of the railroad and associated structures in 1850 along the banks of New York’s Hudson River Tidal Estuary in several areas created the conditions for marshes to form. Credit: the Dams and Sediment in the Hudson project.
Conservationists love tidal marshes. For starters, they’re excellent carbon sinks, but they also provide numerous services, from supplying rich habitats and biodiversity to protecting shorelines against erosion. These areas also tend to absorb and trap pollutants from water. In recent times, however, the world has been losing its tidal marshes as an effect of human activity. But human activity can also create marshes, researchers note in a new study.
New Study Finds More than Half of Hudson River Tidal Marshes were Created Accidentally by Humans; Resilient Against Sea Level Rise Details
UMass Amherst geologist and team studied marshes from Wall Street to Albany
In a new study of tidal marsh resilience to sea level rise, geologist and first author Brian Yellen at the University of Massachusetts Amherst and colleagues observed that Hudson River Estuary marshes are growing upward at a rate two to three times faster than sea level rise, “suggesting that they should be resilient to accelerated sea level rise in the future,” he says.
Writing in Earth Surface Processes and Landforms, Yellen and colleagues documented that more than half of Hudson River tidal marshes formed since 1850. That year, the channel was straightened and a riverside railroad, berms, jetties and human-made islands of dredged soil were built. This all trapped sediment and created backwaters that often – but not always – turned
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