Ecogeomorphic feedbacks influence elevation change across microtidal wetland settings of coastal Louisiana

Wetland dynamics in deltaic settings are highly complex due to the diversity of marsh types and geomorphic settings and varying degrees of human impacts. Therefore, understanding localized drivers of hydrodynamics and sediment transport is essential for accurately assessing vulnerability to sea-level rise. In a recent Nature Communications publication, Li et al. 1 analyzed a globally unique dataset from the Coastwide Reference Monitoring System (CRMS) in the Mississippi Delta and projected a bleak future for Louisiana’s coastal wetlands. They concluded that, under the current trajectory of rising sea levels, up to 75% of these wetlands could be lost by 2070. We suggest a re-evaluation and reinterpretation of their findings—particularly regarding wetland loss rates, inundation thresholds, and the role of ecogeomorphic feedbacks—would allow for the development of a more nuanced understanding of the mechanisms driving landscape change across the Mississippi Delta’s varied environments.