Coastal marsh loss is commonly attributed to changes in external forcings, such as an increase in sea-level rise rate or a reduction in sediment supply. Here we show that extensive marsh loss can be caused by internal mechanisms alone, and specifically by autogenic tidal choking. This occurs when the marsh fills in, increasing tidal dissipation by bed friction and eventually decreasing the tidal range in its landward section. The reduced tidal range decreases sediment import on the marsh platform and increases ponding, both of which lead to interior marsh loss even with modest sea-level rise rates. This process is predicted to occur in dissipative microtidal marshes, which are experiencing some of the fastest rates of marsh loss worldwide. Considering this mechanism is essential to understanding the relationship between marsh loss, sea-level rise, and sediment supply and to eventually predicting future marsh evolution.

中文翻译：

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潮汐耗散形态动力学反馈引发微潮沼泽的消失

沿海沼泽的损失通常归因于外部强迫的变化，例如海平面上升率的增加或沉积物供应的减少。在这里，我们表明，广泛的沼泽损失可能仅由内部机制引起，特别是自生潮汐窒息。当沼泽被填满时，就会发生这种情况，通过河床摩擦增加潮汐消散，并最终减少其向陆部分的潮差。潮差的减小减少了沼泽平台上的沉积物输入并增加了积水，这两者都会导致内部沼泽的损失，即使海平面上升率不大。预计这一过程将发生在耗散微潮沼泽中，这些沼泽正在经历全球最快的沼泽损失速度。考虑这种机制对于理解沼泽损失、海平面上升和沉积物供应之间的关系以及最终预测未来沼泽的演变至关重要。