We know less about phosphorus retention in constructed wetlands than we think we do: A quantitative literature synthesis

作者：Kenneth Anderson, Bishwodeep Adhikari, Olivia F. Schloegel, Raissa Marques Mendonca, Michael P. Back, Nicholas Brocato, Jacob A. Cianci‐Gaskill, Steven E. McMurray, Christie Bahlai, David M. Costello, Lauren Kinsman‐Costello · 发表于：Ecological Indicators · 年份：2024 · DOI：10.1016/j.ecolind.2024.112969 · 被引用次数：7 · 研究领域：Constructed Wetlands for Wastewater Treatment、Soil and Water Nutrient Dynamics、Phosphorus and nutrient management

• Average wetland phosphorus retention was highly variable at 51 ± 164 g/m2/year. • A monitoring period of three years is not sufficient to predict long-term trends. • 70% of studies sampled did not explicitly account for major flow events (storms). • Missing storm events misdiagnosed a wetland as a source of phosphorus. Wetlands are increasingly being constructed to retain phosphorus, but indicators of performance are often unique to individual wetlands. In this quantitative literature synthesis, we highlight two major knowledge gaps and a source of bias in our current understanding of phosphorus retention by constructed and restored wetlands. We performed a literature review to assess differences in wetland characteristics, phosphorus retention, and sampling frequency and duration to better understand how constructed and restored wetlands retain phosphorus. We then examined a series of different sampling frequencies to determine how sampling approaches affect observed trends using a case study at the Old Woman Creek National Estuarine Research Reserve where high-resolution data on phosphorus concentrations was available. We found that, while differences among broad wetland structural groupings exist, measured rates of phosphorus retention are highly variable. Additionally, we observed that the wetlands sampled in the literature are most often newly constructed; 70% of the wetlands were monitored for three or fewer years. Among twelve wetlands that were monitored for over te...