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Coastal Wetlands Drowning: 84% Can't Keep Pace
4 Aug
Summary
- 84% of US coastal wetlands are being inundated by rising sea levels.
- Wetlands provide critical storm surge protection and habitats.
- Some wetlands may survive by migrating inland if space is available.
A significant majority of coastal wetlands in the contiguous United States are succumbing to rising sea levels, according to a new nationwide study. Researchers analyzed nearly 450 wetlands over two decades and found that 84% are experiencing gradual inundation. If this trend persists, many of these areas are projected to become open water.
These coastal wetlands are essential for buffering storm surges, protecting infrastructure, and supporting diverse wildlife. Their loss carries substantial ecological, economic, and social repercussions. While 89% of wetlands are gaining elevation through sediment buildup, only 16% are doing so effectively enough to counteract sea-level rise.
Regional variations exist, with the Gulf Coast appearing more vulnerable due to a combination of sea-level rise and human impacts like altered river flow and subsidence. Some Atlantic Coast wetlands are faring better due to marine sediment input.
Encouragingly, 73% of wetlands still have the potential to migrate inland if undeveloped land is available and accessible. Conservation efforts may focus on protecting these migration corridors and removing development barriers to aid wetland survival.
