Wetland restoration requires managing long‐term changes in hydroperiod and ecosystem functions. We quantified relationships among spatiotemporal variability in wetland hydrology and total phosphorus (TP) and its stoichiometric relationships with total organic carbon (TOC:TP) and total carbon (TC:TP) and total nitrogen (TN:TP) in water, flocculent organic matter (floc), periphyton, sawgrass (Cladium jamaicense), and soil during early phases of freshwater wetland restoration—water year (WY) 2016 (1 May, 2015 to 30 April, 2016) to WY 2019—in Everglades National Park (ENP, Homestead, FL, U.S.A.). Wetland hydroperiod increased by 87 days, following restoration actions and rainfall events that increased median stage in the upstream source canal. Concentrations of TP were highest and most variable at sites closest (<1 km) to canal inputs and upstream wetland sources of legacy P. Surface water TOC:TP and TN:TP ratios were highest in wetlands >1 km downstream of the canal in wet season 2015 with spatial variability reflecting disturbances including droughts, fires, and freeze events. The TP concentrations of flocculent soil surface particles, periphyton, sawgrass, and consolidated soil declined, and TC:TP and TN:TP ratios increased (except soil) logarithmically with downstream distance from the canal. We measured abrupt increases in periphyton (wet season 2018) and sawgrass TP (wet season 2015 and 2018) at sites <1 km from the canal, likely reflecting legacy TP loading. Our results suggest restoration efforts that increase freshwater inflow and hydroperiod will likely change patterns of nutrient concentrations among water and organic matter compartments of wetlands as a function of nutrient legacies.

中文翻译：

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在佛罗里达大沼泽地淡水恢复的早期阶段，增加水周期对湿地养分浓度的影响

湿地恢复需要管理水文周期和生态系统功能的长期变化。我们量化了湿地水文学与总磷（TP）的时空变化之间的关系及其与水，絮凝有机物中总有机碳（TOC：TP）和总碳（TC：TP）和总氮（TN：TP）的化学计量关系（絮状），附生植物，锯齿草（Cladium jamaicense）和淡水湿地恢复早期阶段的土壤-2016年水年（WY）（2015年5月1日至2016年4月30日）至2019年WY-美国大沼泽地国家公园（ENP，霍姆斯特德，佛罗里达州）。在恢复行动和降雨事件增加了上游源渠的中位阶段之后，湿地的水文期增加了87天。TP的浓度最高，并且在距运河输入点最近的地方（<1 km）和遗留磷的上游湿地来源变化最大。在运河下游1 km以上的湿地中，地表水TOC：TP和TN：TP比最高2015年第四季，空间变化反映了干旱，火灾和冰冻事件等干扰。絮凝土壤表层颗粒，附生植物，锯齿草和固结土壤的TP浓度下降，TC：TP和TN：TP比值（土壤除外）随与运河的下游距离呈对数增加。我们测量了距运河不到1公里的地点的附生植物（2018年湿季）和锯齿草TP（2015年和2018年湿季）的突然增加，这可能反映了传统TP的负荷。我们的研究结果表明，增加淡水流入量和水文周期的恢复工作可能会改变湿地水和有机物间的养分浓度模式，这是养分含量的函数。