Potential increase in coastal wetland vulnerability to sea-level rise suggested by considering hydrodynamic attenuation effects
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Nature Publishing Group
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The future of coastal wetlands and their ecological value depend on their capacity to adapt to the interacting effects of human impacts and sea-level rise. Even though extensive wetland loss due to submergence is a possible scenario, its magnitude is highly uncertain due to limited understandig of hydrodinamic and bio-geomorphic attenuation and consequent wetland evolution is poorly understood. Predicitons are further complicated by the presence of a number of vegetation types that change over time and also contribute to flow attenuation. Here, we show that flow attenuation affects wetland vegetation by modifying its wetting-drying regime and inundation depth, increasing its vulnerability to sea-level rise. Our simulatios for an Australian subtropical wetland predict much faster wetland loss than commonly used moldes that do not consider flow attenuation.
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