Coastal wetlands as sources of Escherichia coli to the nearshore of Lake Ontario
Coastal wetlands as sources of Escherichia coli to the nearshore of Lake Ontario
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Full item details
- dc.contributor.author
- Harrow-Lyle, Tyler J.
- Chomicki, Krista M.
- Kirkwood, Andrea E.
- dc.date.accepted
- 2023-12-19
- dc.date.accessioned
- 2025-05-01T13:30:35Z
- dc.date.available
- 2025-05-01T13:30:35Z
- dc.date.issued
- 2024-03-24
- dc.date.submitted
- 2023-05-15
- dc.description - en
- This study investigated E. coli abundance and dynamics in 4 coastal wetlands on the north shore of Lake Ontario from 2009-2018 and applied a general additive model to reveal seasonal, interannual, spatial, inter-seasonal and interannual spatial trends for E. coli concentrations in the study area.
- dc.description.abstract - en
- Beaches within the Laurentian Great Lakes Basin are frequently contaminated with fecal bacteria such as <i>Escherichia coli (E. coli)</i>, leading to beach closures due to potential health risks. Climatic drivers and landscape sources of <i>E. coli</i> to nearshore areas have been established, the role of coastal wetlands as sources of coliform bacteria remains a major knowledge gap. We investigated <i>E. coli</i> abundance and dynamics in four coastal wetlands (3 drowned river mouth 33 and 1 barrier beach lagoon) on the north-shore of Lake Ontario for over a decade (2009-2018). A general additive model revealed significant seasonal, interannual, and spatial trends for <i>E. coli</i> concentrations across the study area. Additionally, we observed celled sites (i.e., natural ponds in wetlands) to have a higher partial effect on <i>E. coli</i> concentrations across the study period, indicating that these wetland features may be an important reservoir for endogenously sourced <i>E. coli</i>. To determine whether increased wave activity, indicative of seiche events, influenced <i>E. coli</i> concentrations in the wetland and the nearshore of Lake Ontario, we developed a local structural equation model to represent the entire study area. Seiche events were identified to significantly increase suspended solid loadings, which in turn resulted in significantly (p-value < 0.05) elevated <i>E. coli</i> concentrations in both the coastal wetlands and Lake Ontario. In addition to watershed inputs, our results demonstrated that coastal wetlands significantly (p-value < 0.05) influence <i>E. coli</i> concentrations in the nearshore of Lake Ontario, and should be considered in nearshore water quality assessments and mitigation efforts.
- dc.description.fosrctranslation - fr
- Dans le cadre de cette étude, nous avons examiné l’abondance et la dynamique de la bactérie <i>E. coli</i> dans quatre zones humides côtières sur la rive nord du lac Ontario de 2009 à 2018. Nous avons appliqué un modèle additif général pour révéler les tendances saisonnières, interannuelles, spatiales, intersaisonnières et spatiales interannuelles pour les concentrations d’<i>E. coli</i> dans la zone d’étude.
- dc.identifier.issn
- 2773-0719
- 0380-1330
- dc.identifier.uri
- https://open-science.canada.ca/handle/123456789/3613
- dc.language.iso
- en
- dc.publisher - en
- Elsevier
- dc.relation.isreplacedby
- https://doi.org/10.1016/j.jglr.2024.102292
- dc.rights - en
- Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)
- dc.rights - fr
- Creative Commons Attribution - Pas d'utilisation commerciale - Pas de modification 4.0 International (CC BY-NC-ND 4.0)
- dc.rights.openaccesslevel - en
- Green
- dc.rights.openaccesslevel - fr
- Vert
- dc.rights.uri - en
- https://creativecommons.org/licenses/by-nc-nd/4.0/
- dc.rights.uri - fr
- https://creativecommons.org/licenses/by-nc-nd/4.0/deed.fr
- dc.subject - en
- Wetlands
- Lakes
- Pollutants
- Bacteria
- dc.subject - fr
- Zone humide
- Lac
- Polluant
- Bactérie
- dc.subject.en - en
- Wetlands
- Lakes
- Pollutants
- Bacteria
- dc.subject.fr - fr
- Zone humide
- Lac
- Polluant
- Bactérie
- dc.title - en
- Coastal wetlands as sources of Escherichia coli to the nearshore of Lake Ontario
- dc.title.alternative - fr
- Les zones humides côtières en tant que sources de bactérie Escherichia coli dans le littoral du lac Ontario
- dc.type - en
- Accepted manuscript
- dc.type - fr
- Manuscrit accepté
- local.acceptedmanuscript.articlenum
- 102292
- local.article.journalissue
- 2
- local.article.journaltitle - en
- Journal of Great Lakes Research
- local.article.journalvolume
- 50
- local.pagination
- 27 pages
- local.peerreview - en
- Yes
- local.peerreview - fr
- Oui
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