A new study from the University of British Columbia suggests that rising sea levels could pose a serious threat to shorebird habitats around the world. This is the first comprehensive global review of how sea-level rise affects shorebirds, which include species like plovers, sandpipers, and oystercatchers. Published in the journal Biodiversity and Conservation, the study analyzed data from 37 research papers, finding that 78% of them reported negative effects on shorebird habitats, and 89% found negative impacts on bird populations or individual birds. One of the key issues identified in the study is “coastal squeeze,” a phenomenon where rising sea levels push wetlands inland, but human infrastructure like dikes, roads, and buildings block this natural migration. In areas without such barriers, wetlands can shift inland, maintaining their ecological functions. However, where development limits this movement, wetlands become trapped, leading to habitat loss and a decline in the species that rely on them. The consequences for shorebirds may be more severe than just habitat loss. In eight out of nine studies that looked at both habitat and population effects, the projected declines in bird numbers were worse than expected from habitat loss alone. Shorebirds are known for their long migrations, traveling hundreds to tens of thousands of kilometers each year. They depend on coastal wetlands like tidal flats to rest and feed during their journeys. In British Columbia, the Fraser River Estuary is a key stopover site for many species, where they gather to refuel along the Pacific Flyway. However, rising sea levels can reduce the time these tidal flats are exposed, limit prey availability, and increase the risk of nest flooding due to higher water levels. The researchers stress that urgent planning and adaptation strategies are needed to protect these vital habitats. They recommend that planners create space for wetlands to move inland, remove or modify artificial barriers, increase sediment supply to build up wetlands, and consider managed retreat from coastal areas when appropriate. As an example, the Sturgeon Bank Sediment Enhancement Pilot Project in the Fraser River Estuary is being tested to see how adding sediment can help raise wetland levels and support coastal ecosystems.