Princeton University researchers may have solved a long-standing mystery in conservation that could influence how natural lands are designated for the preservation of endangered species.
Around the world, the migratory shorebirds that are a conspicuous feature of coastal habitats are losing access to the tidal flats — the areas between dry land and the sea — they rely on for food as they travel and prepare to breed. But a major puzzle has been that species’ populations are plummeting several times faster than the rate at which coastal ecosystems are lost to development.
Nowhere is the loss of tidal flats and shorebird species more acute than along the East Asia-Australasian Flyway (EAAF). An estimated 5 million migratory birds from 55 species use the flyway to travel from southern Australia to northern Siberia along the rapidly developing coast of China — where tidal flats can be more than 6 miles wide — at which birds stop to rest and refuel.
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Image: Princeton researchers may have solved the long-standing puzzle of why migratory shorebirds around the world are plummeting several times faster than coastal ecosystems are being developed. They discovered that shorebirds overwhelmingly rely on the portion of tidal zones closest to dry land for food and rest as they migrate, which are the locations most often lost to development. The findings stress the need for integrating upper tidal flats into conservation plans focused on migratory shorebirds. (Credit: Photo by Tong Mu, Department of Ecology and Evolutionary Biology)