River damming alters nutrient fluxes along the land‐ocean aquatic continuum as a result of biogeochemical processes in reservoirs. Both the changes in riverine nutrient fluxes and nutrient ratios impact ecosystem functioning of receiving water bodies. We utilize spatially distributed mechanistic models of nitrogen (N), phosphorus (P), and silicon (Si) cycling in reservoirs to quantify changes in nutrient stoichiometry of river discharge to coastal waters. The results demonstrate that the growing number of dams decouples the riverine fluxes of N, P, and Si. Worldwide, preferential removal of P over N in reservoirs increases N:P ratios delivered to the ocean, raising the potential for P limitation of coastal productivity. By midcentury, more than half of the rivers discharging to the coastal zone will experience a higher removal of reactive Si relative to reactive P and total N, in response to the rapid pace at which new hydroelectric dams are being built.

中文翻译：

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全球大坝驱动的河流N：P：Si比例传递到沿海海洋的变化

由于水库中的生物地球化学过程，河流拦河坝改变了陆地-海洋水连续体的养分通量。河流养分通量和养分比的变化都会影响接收水体的生态系统功能。我们利用储层中氮（N），磷（P）和硅（Si）循环的空间分布机理模型来量化河流向沿海水域的营养物化学计量的变化。结果表明，水坝数量的增加使氮，磷和硅的河流通量解耦。在全球范围内，水库中的磷优先于氮的去除会增加输送到海洋的氮磷比，从而增加限制沿海生产力的磷的潜力。到本世纪中叶，