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Phosphorus retention and transformation in a dammed reservoir of the Thames River, Ontario: Impacts on phosphorus load and speciation

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dc.contributor.authorKao, N.
dc.contributor.authorSorichetti, R.J.
dc.contributor.authorNiederkorn, A.
dc.contributor.authorCappellen, P. Van
dc.contributor.authorParsons, C.T.
dc.date.accessioned2022-02-01T21:21:17Z
dc.date.available2022-02-01T21:21:17Z
dc.date.issued2022-02
dc.description.abstractExtensive efforts are underway to reduce phosphorus (P) export from the Lake Erie watershed. On the Canadian side, the Thames River is the largest tributary source of P to Lake Erie’s western basin. However, the role of dams in retaining and modifying riverine P loading to the lake has not been comprehensively evaluated. We assessed whether Fanshawe Reservoir, the largest dam reservoir on the Thames River, acts as a source or sink of P, using year-round discharge and water chemistry data collected in 2018 and 2019. We also determined how in-reservoir processes alter P speciation by comparing the dissolved reactive P to total P ratio (DRP:TP) in upstream and downstream loads. Annually, Fanshawe Reservoir was a net sink for P, retaining 25% (36 tonnes) and 47% (91 tonnes) of TP in 2018 and 2019, respectively. Seasonally, the reservoir oscillated between a source and sink of P. Net P release occurred during the spring of 2018 and the summers of 2018 and 2019, driven by internal P loading and hypolimnetic discharge from the dam. The reservoir did not exert a strong influence on DRP:TP annually, but ratio increases occurred during both summers, concurrent with water column stratification. Our analysis demonstrates that Fanshawe Reservoir is not only an important P sink on the Thames River, but also modulates the timing and speciation of P loads. We therefore propose that the potential of using existing dam reservoirs to attenuate downstream P loads should be more thoroughly explored alongside source based P mitigation strategies.en
dc.description.sponsorshipCanada-Ontario Agreement on Great Lakes Water Quality and Ecosystem Health || Canada First Research Excellence Fund through the Lake Futures project of the Global Water Futures.en
dc.identifier.urihttps://doi.org/10.1016/j.jglr.2021.11.008
dc.identifier.urihttp://hdl.handle.net/10012/18027
dc.language.isoenen
dc.publisherElsevieren
dc.relation.ispartofseriesJournal of Great Lakes Research;
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectphosphorusen
dc.subjectriversen
dc.subjectreservoirsen
dc.subjectdam managementen
dc.subjecteutrophicationen
dc.subjectlake erieen
dc.titlePhosphorus retention and transformation in a dammed reservoir of the Thames River, Ontario: Impacts on phosphorus load and speciationen
dc.typeArticleen
dcterms.bibliographicCitationKao, N., Mohamed, M., Sorichetti, R. J., Niederkorn, A., Van Cappellen, P., & Parsons, C. T. (2022). Phosphorus retention and transformation in a dammed reservoir of the Thames River, Ontario: Impacts on phosphorus load and speciation. Journal of Great Lakes Research, 48(1), 84–96. https://doi.org/10.1016/j.jglr.2021.11.008en
uws.contributor.affiliation1Faculty of Scienceen
uws.contributor.affiliation2Earth and Environmental Sciencesen
uws.peerReviewStatusRevieweden
uws.scholarLevelFacultyen
uws.typeOfResourceTexten

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