Nutrient homeostasis relates ambient stoichiometric conditions in an environment to the stoichiometry of living entities of that ecosystem. Plant nutrient sequestration in wetland ecosystems is a key process for downstream water quality. However, few studies have examined stoichiometric homeostasis of aquatic vegetation despite the importance of stoichiometry to plant nutrient uptake efficiency. This study investigated stoichiometric homeostasis of dominant emergent and submerged aquatic vegetation (EAV and SAV, respectively) within two treatment flow-ways of Everglades Stormwater Treatment Area 2 (STA-2). These flow-ways encompass a large gradient in plant nutrient availability. This study hypothesizes that wetland vegetation is homeostatic relative to ambient nutrients and consequently nutrient resorption does not vary along the nutrient gradient. We developed a framework to investigate how vegetation uptake and resorption of nutrients contribute separately to homeostasis. Overall, we determined that the wetland vegetation in this study was non-homeostatic with respect to differential uptake of nitrogen (N) versus phosphorus (P). In EAV, P resorption was relatively high and N resorption was moderate, and resorption efficiency did not vary significantly along the gradient. In separating the proportional contribution of resorption and uptake to the degree of homeostasis, resorption did not affect overall homeostatic status in EAV.

营养动态平衡将环境中的环境化学计量条件与该生态系统的生命实体的化学计量联系起来。湿地生态系统中的植物养分固存是下游水质的关键过程。然而，尽管化学计量对植物养分吸收效率的重要性，但很少有研究检查水生植物的化学计量稳态。本研究调查了Everglades雨水处理区2（STA-2）的两个处理流中主要水生植被和淹没水生植物（分别为EAV和SAV）的化学计量稳态。这些流道涵盖了植物养分利用率的较大梯度。这项研究假设湿地植被相对于周围养分具有稳态作用，因此养分吸收不会随养分梯度的变化而变化。我们开发了一个框架来研究植被吸收和养分吸收如何分别促进体内稳态。总体而言，就氮（N）与磷（P）的差异吸收而言，我们确定本研究中的湿地植被是非稳态的。在EAV中，P吸收相对较高，N吸收适中，并且吸收效率沿梯度变化不大。在分离吸收和摄取对体内稳态程度的比例贡献中，吸收不影响EAV的总体稳态。我们开发了一个框架来研究植被吸收和养分吸收如何分别促进体内稳态。总体而言，就氮（N）与磷（P）的差异吸收而言，我们确定本研究中的湿地植被是非稳态的。在EAV中，P吸收相对较高，N吸收适中，并且吸收效率沿梯度变化不大。在分离吸收和摄取对体内稳态程度的比例贡献中，吸收不影响EAV的总体稳态。我们开发了一个框架来研究植被吸收和养分吸收如何分别促进体内稳态。总体而言，就氮（N）与磷（P）的差异吸收而言，我们确定本研究中的湿地植被是非稳态的。在EAV中，P吸收相对较高，N吸收适中，并且吸收效率沿梯度变化不大。在分离吸收和摄取对体内稳态程度的比例贡献中，吸收不影响EAV的总体稳态。吸收效率沿梯度变化不大。在分离吸收和摄取对体内稳态程度的比例贡献中，吸收不影响EAV的总体稳态。吸收效率沿梯度变化不大。在分离吸收和摄取对体内稳态程度的比例贡献中，吸收不影响EAV的总体稳态。