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Kay ML, Wiklund JA, Remmer CR, Owca TJ, Klemt WH, Neary LK, Brown K, MacDonald E, Thomson K, Vucic JM, Wesenberg K, Hall RI, Wolfe BB. Evaluating temporal patterns of metals concentrations in floodplain lakes of the Athabasca Delta (Canada) relative to pre-industrial baselines. Sci Total Environ 2020; 704:135309. [PMID: 31896213 DOI: 10.1016/j.scitotenv.2019.135309] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Revised: 09/24/2019] [Accepted: 10/29/2019] [Indexed: 06/10/2023]
Abstract
Sediment quality monitoring is widely used to quantify extent of river pollution, but requires knowledge of pre-disturbance conditions in the potentially altered landscape. This has long been identified as a critical aspect to develop for addressing concerns of river pollution in the Alberta Oil Sands Region. Here, we use analyses of sediment cores from eight floodplain lakes spanning a 67 river-km transect across the Athabasca Delta to define pre-1920 (pre-industrial) baseline concentrations for vanadium and five primary pollutants. We then evaluate if sediment metals concentrations have become enriched above baseline since onset of oil sands development and other industrial activities. Results demonstrate no enrichment of metals concentrations (except zinc at one lake) and absence of consistent temporal increases above pre-industrial baselines. Thus, natural processes continue to dominate metal deposition in floodplain lakes of the Athabasca Delta -- an important finding to inform stewardship decisions. The pre-1920 metals concentrations baselines offer a useful tool for ongoing sediment monitoring in aquatic ecosystems of the Athabasca Delta.
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Affiliation(s)
- M L Kay
- Department of Biology, University of Waterloo, Waterloo, ON N2L 3G1, Canada.
| | - J A Wiklund
- Department of Biology, University of Waterloo, Waterloo, ON N2L 3G1, Canada
| | - C R Remmer
- Department of Biology, University of Waterloo, Waterloo, ON N2L 3G1, Canada
| | - T J Owca
- Department of Geography and Environmental Studies, Wilfrid Laurier University, Waterloo, ON N2L 3C5, Canada
| | - W H Klemt
- Department of Biology, University of Waterloo, Waterloo, ON N2L 3G1, Canada
| | - L K Neary
- Department of Biology, University of Waterloo, Waterloo, ON N2L 3G1, Canada
| | - K Brown
- Department of Biology, University of Waterloo, Waterloo, ON N2L 3G1, Canada
| | - E MacDonald
- Department of Biology, University of Waterloo, Waterloo, ON N2L 3G1, Canada
| | - K Thomson
- Department of Geography and Environmental Studies, Wilfrid Laurier University, Waterloo, ON N2L 3C5, Canada
| | - J M Vucic
- Department of Biology, University of Waterloo, Waterloo, ON N2L 3G1, Canada
| | - K Wesenberg
- Department of Biology, University of Waterloo, Waterloo, ON N2L 3G1, Canada
| | - R I Hall
- Department of Biology, University of Waterloo, Waterloo, ON N2L 3G1, Canada
| | - B B Wolfe
- Department of Geography and Environmental Studies, Wilfrid Laurier University, Waterloo, ON N2L 3C5, Canada
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