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Phosphorus uptake and release patterns in overwintering constructed floating wetlands.
Dekle, Jack; Strosnider, William H J; White, Sarah A.
Afiliação
  • Dekle J; Environmental Toxicology Graduate Program, 509 Westinghouse Rd., Clemson University, Pendleton, South Carolina 29670, USA E-mail: swhite4@clemson.edu.
  • Strosnider WHJ; Belle W. Baruch Institute for Marine and Coastal Sciences, University of South Carolina, Georgetown, South Carolina, 29442, USA.
  • White SA; Department of Plant and Environmental Sciences, E-143 Poole Agricultural Center, Clemson University, Clemson, South Carolina 29634, USA.
Water Sci Technol ; 89(3): 588-602, 2024 Feb.
Article em En | MEDLINE | ID: mdl-38358491
ABSTRACT
Understanding nutrient cycling patterns in plants deployed within constructed floating wetlands (CFWs) is critical for improving CFWs' design and management practices. This study evaluated phosphorus (P) uptake and release patterns during fall/winter plant senescence and spring regrowth. Two mesocosm-scale CFW experiments were conducted characterizing plant growth, plant tissue P levels, and water quality (nutrients and phytoplankton). Experiment 1 quantified P uptake during spring regrowth after overwintering, and experiment 2 quantified P release during fall senescence. Plant treatments (CFWs with Pontederia cordata or Juncus effusus) were compared to an open-water control. In spring, J. effusus removed 0.056 g P m-2 d-1 (19.4% of the load), P. cordata removed 0.034 g P m-2 d-1 (10%), and the open-water control removed 0.03 g P m-2 d-1 (10%). In fall, J. effusus fixed 0.008 g P m-2 d-1 (2.1% of the load), P. cordata released 0.014 g P m-2 d-1 (-2.1%), and controls fixed 0.023 g P m-2 d-1 (6.3%). P was consistently released during the fall experiment and occasionally released in the spring experiment, likely from senescing plant tissues (fall) and from roots sloughing after new root growth (spring). Results demonstrate the potential for multi-season deployment of CFWs using J. effusus for reducing P loads year-round.
Assuntos

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Nutrientes / Áreas Alagadas Idioma: En Ano de publicação: 2024 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Nutrientes / Áreas Alagadas Idioma: En Ano de publicação: 2024 Tipo de documento: Article