Rising seas threaten the world's migratory shorebirds
Birds undertake some of the world's most impressive migrations, traveling hundreds to thousands of kilometers every year in search of safe breeding grounds and seasonally abundant food resources. For many birds, migration is the key to their success. However, migration can also make species more vulnerable to threats.
The article discusses the threat sea-level rise poses to migratory shorebirds, reviewing 37 studies. Shorebirds, which live along coastlines, rely on coastal habitats like beaches and tidal flats for breeding and feeding. As sea levels rise, these habitats shrink or become inaccessible due to coastal infrastructure, a phenomenon known as coastal squeeze.
The loss of these habitats directly impacts shorebirds by limiting food access, nesting space, and increasing competition. Additionally, sea-level rise may alter prey distribution, reproductive success, and feeding time. Studies predict negative impacts on both shorebird habitats and populations. Conservation efforts should focus on protecting migratory bottlenecks and enhancing habitats, potentially through managed retreat or sediment restoration.
Preserving coastal ecosystems, which also provide ecosystem services like coastal protection and carbon storage, is crucial for shorebird survival.
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