A 4.6-ha urban stormwater treatment wetland complex in southwest Florida has been investigated for several years to understand its nutrient retention dynamics. This study investigates the role of aquatic vegetation, both submerged vegetation (such as benthic macrophytic and algal communities) and emergent plant communities, on changes in nutrient fluxes through the wetlands. Gross and net primary productivity of water column communities and net primary productivity of emergent macrophytes were used to estimate nutrient fluxes through vegetation in these wetlands using biannual biomass, nutrient concentrations of plant material, and areal coverage data. Emergent macrophyte net primary productivity was estimated as the difference between the increase of productivity during the wet season and the loss during the dry season which, in turn, suggested approximately 0.11g-N m^− 2 y^− 1 and 0.09g-P m^− 2 yr^− 2 being removed, primarily from the soil, by emergent vegetation. Water column primary productivity accounted for a much larger flux of nutrients with approximately 39.6g-N m^− 2 yr^− 1 and 2.4g-P m^− 2 yr^− 1 retained in algal communities. These fluxes, combined with measurements in parallel studies, allowed us to develop preliminary nutrient budgets for these wetlands and identify gaps, or missing fluxes, in our models for these wetlands. The results further validated previous findings that suggested that there are large inputs of nitrogen (up to 62.3g-N m^− 2 yr^− 1) that are not accounted for by the pumped inflow. Additionally, management suggestions are provided to improve water quality by identifying vegetative species that are most effective at retaining nutrients.

为了了解其养分动态，对佛罗里达州西南部一个4.6公顷的城市雨水处理湿地综合体进行了数年的调查。这项研究调查了淹没植被（例如底栖大型植物和藻类群落）和新兴植物群落等水生植被对通过湿地的养分通量变化的作用。水柱群落的毛净初级生产力和净初级生产力以及新兴大型植物的净初级生产力被用来通过使用半年度生物量，植物材料的养分浓度和面积覆盖数据来估算这些湿地中植被的养分通量。新兴的大型植物净初级生产力被估计为雨季生产力增加与旱季损失之间的差，进而，^{− 2} y ^{− 1}和0.09gP m ^{− 2} yr ^-2主要是通过新兴植被从土壤中清除的。水柱的初级生产力占较大的养分通量，藻类群落中保留了约39.6gN m ^-2 yr ^-1和2.4gP m ^-2 yr ^-1。这些通量与平行研究中的测量结果相结合，使我们能够为这些湿地制定初步的养分预算，并在我们的这些湿地模型中确定差距或缺失的通量。该结果进一步验证了先前的发现，该发现表明存在大量的氮输入（高达62.3gN m ^-2 yr ^-1），但泵入流量未计入。此外，还提供了管理建议，以通过识别最有效地保留营养的营养物种来改善水质。