Phosphorus retention and fractionation in an eutrophic wetland: A one-year mesocosms experiment under fluctuating flooding conditions

This study aimed to evaluate the response of salt marshes to pulses of PO4 3--enriched water, with and without the presence of Phragmites australis. A one-year mesocosms experiment was performed in simulated soil profiles (fine-textured surface layers and sandy subsurface layers) from a coastal salt marsh of the Mar Menor lagoon under alternating flooding-drying conditions with eutrophic water, under low (1.95 mg L 1 P-PO4 3-) and high (19.5 mg L 1 P-PO4 3-) P load, and with the presence/absence of Phragmites. The PO4 3- concentrations in soil porewater and drainage water were regularly measured, and P accumulated in soils (including a fractionation procedure) and plants (roots, rhizomes, stems and leaves) were analyzed. The experimental mesocosms were highly effective in the removal of P from the eutrophic flooding water (>90% reduction of the P added to the system both in the soil pore water and drainage water), regardless of the nutrient load, the season of the year and the presence/absence of Phragmites. The soil was the main sink of the P added to the system, while Phragmites had a minor role in P removal. The biomass of Phragmites accumulated ~27% of the P added with the flooding water in the treatment with water of low P load while ~12% of P in that of high P load; the rhizomes were the organs that contributed the most (~67e72% of the total P retained by the plants). Ca/Mg compounds were the main contributors to the retention of P in the soil compartment, especially in the fine-textured surface soil layers (~34e53% of the total P in the soil was present in this fraction). Phragmites favored the retention of P onto metal oxides (~12% increase of the P retained in the metal oxides fraction in the treatment with water of high P load). Hence, the use of constructed wetlands to ameliorate the negative impacts of P-enriched waters in the Mar Menor lagoon and similar areas is recommended. We propose the incorporation of fine-textured carbonated materials, with high content of Ca/Mg compounds, and the use of Phragmites to favor the retention of P by these systems

Data and Resources

Cite as

Tercero M.C. Álvarez Rogel J. Conesa H.M. Párraga Aguado I. y González Alcaraz M.N. Phosphorus retention and fractionation in an eutrophic wetland: A one-year mesocosms experiment under fluctuating flooding conditions. Elsevier B.V., 2017. https://doi.org/10.1016/j.jenvman.2016.12.060

Clipboard Icon
Retrieved: 20 Jan 2025 10:59:50
RIS BibTeX

Metadata
Download
DCAT-AP/NTI-RISP

Basic information
Resource type Article
Date of creation 2024-11-05
Date of last revision 2025-01-20
Show changelog
Metadata identifier c73daf52-6c28-59d8-ab38-70afa6c24486
Metadata language Spanish
Themes (NTI-RISP)
High-value dataset category Earth observation and environment
ISO 19115 topic category biota
Keyword URIs
Bibliographic information
Name of the dataset creator Tercero, M.C., Álvarez Rogel, J., Conesa, H.M., Párraga Aguado, I. y González Alcaraz, M.N.
Name of the dataset editor Elsevier B.V.
Other identifier DOI: 10.1016/j.jenvman.2016.12.060
Identifier of the dataset creator
Email of the dataset creator carmen.tercero@upct.es
Website of the dataset creator
Provenance
Lineage statement
Metadata Standard
Version notes
Version