Multi-decadal impacts of effluent loading on phosphorus sorption capacity in a restored wetland

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dc.contributor.authorMi, Chenxi
dc.contributor.authorSoued, Cynthia
dc.contributor.authorBortolotti, Lauren E.
dc.contributor.authorPadiou, Pascal
dc.contributor.authorPage, Bryan
dc.contributor.authorDenny, Mariya
dc.contributor.authorBogard, Matthew J.
dc.date.accessioned2025-09-10T22:59:01Z
dc.date.available2025-09-10T22:59:01Z
dc.date.issued2025
dc.descriptionOpen access article. Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International license (CC BY-NC-ND 4.0) applies
dc.description.abstractNatural wetlands are widely used and cost-effective systems for the passive remediation of phosphorus (P)-rich surface waters from various effluent sources. Yet the long-term biogeochemical impacts of effluent loading on wetland P retention capacity are unclear. Here, we had a unique opportunity to document the spatio-temporal evolution of sediment P sorption over a ∼25-year period of constant municipal and industrial effluent loading, as part of a wetland restoration and wastewater treatment strategy in one of the largest restored wetlands in Canada. Sediment P sorption experiments across Frank Lake's three basins revealed a wide spatial variation in sorption capacity, closely linked to sediment geochemistry gradients (Ca, Fe, and Mn). Relative to a similar study ∼25 years prior, P sorption capacity has become exhausted near the effluent inlet, but remarkably, remains elevated throughout the rest of the wetland. Compared to other prairie wetlands and global aquatic ecosystems, Frank Lake has a greater capacity overall to retain P through sediment sorption. Given the paucity of long-term (multi-decade) data on wetland response to effluent loading, we provide key insights into the dynamics of wetland P cycling in human-dominated watersheds.
dc.description.peer-reviewYes
dc.identifier.citationMi, C., Soued, C., Bortolotti, L. E., Badiou, P., Page, B., Denny, M., & Bogard, M. J. (2025). Multi-decadal impacts of effluent loading on phosphorus sorption capacity in a restored wetland. Environmental Research, 264(1), Article 120256. https://doi.org/10.1016/j.envres.2024.120256
dc.identifier.urihttps://hdl.handle.net/10133/7124
dc.language.isoen
dc.publisherElsevier
dc.publisher.departmentDepartment of Biological Sciences
dc.publisher.facultyArts and Science
dc.publisher.institutionUniversity of Lethbridge
dc.publisher.institutionShenyang Agricultural University
dc.publisher.institutionDucks Unlimited Canada
dc.publisher.urlhttps://doi.org/10.1016/j.envres.2024.120256
dc.subjectRestored wetlands
dc.subjectMunicipal effluent
dc.subjectSediment geochemistry
dc.subjectPhosphorus sorption
dc.subjectHydrological connectivity
dc.subjectRemediation
dc.subjectFrank Lake wetland
dc.subject.lcshWetland ecology
dc.subject.lcshFrank Lake (Alta.)
dc.titleMulti-decadal impacts of effluent loading on phosphorus sorption capacity in a restored wetland
dc.typeArticle
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