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Survival and Reproductive Effects in the Aquatic Invertebrate Ceriodaphnia dubia Exposed to Uranium Spiked Site Water Collected from Two Creeks in the Yukon, Canada.
Arch Environ Contam Toxicol. 2020 Jul; 79(1):80-88.AE

Abstract

This study evaluates aqueous uranium (U) toxicity in Ceriodaphnia dubia exposed to surface water collected from two creeks located in U-rich areas of Yukon, Canada. Water for toxicity testing was collected at two times of the year to represent water quality characteristics generally observed during open-water (high flows) and winter baseflow water (low flows) seasons. Collected water was transferred to the toxicological laboratory and spiked with U to achieve nominal concentrations of 50, 150, 350, 500, 650, 800, and 1000 µg U/L. Toxicity endpoints included lethal concentrations (LC50) for survival, in addition to no observed effect concentration (NOEC) and lowest observed effect concentration (LOEC) for reproduction. All derived toxicity endpoints were significantly higher than applicable Canadian water-quality guidelines for U (15 μg/L [Chronic] and 33 μg/L [Acute]). No effects on C. dubia survival were observed at LC50 concentrations > 799 μg U/L. Derived NOEC (381 μg U/L) and LOEC (524 μg U/L) values also were significantly above chronic water quality guidelines. The differences noted in the toxicity response between seasons were mainly due to the presence of toxicity ameliorating factors for U (i.e., dissolved organic carbon). These results highlight the high conservatism in applicable water-quality guidelines and the crucial need to consider site-specific water characteristics when deriving environmentally relevant, yet protective thresholds for uranium in aquatic environments.

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Authors+Show Affiliations

Muscatello J
Lorax Environmental Services Ltd., 2289 Burrard Street, Vancouver, BC, V6J 3H9, Canada. jorgelina.muscatello@lorax.ca.
Flather D
Lorax Environmental Services Ltd., 2289 Burrard Street, Vancouver, BC, V6J 3H9, Canada.
Gjertsen J
Newmont/Goldcorp, Vancouver, Canada.

MeSH

AnimalsCladoceraRadiation MonitoringReproductionSurvival AnalysisToxicity TestsUraniumWater Pollutants, ChemicalWater Pollutants, RadioactiveWater QualityYukon Territory

Pub Type(s)

Journal Article

Language

eng

PubMed ID

32388663

Citation

Muscatello, Jorgelina, et al. "Survival and Reproductive Effects in the Aquatic Invertebrate Ceriodaphnia Dubia Exposed to Uranium Spiked Site Water Collected From Two Creeks in the Yukon, Canada." Archives of Environmental Contamination and Toxicology, vol. 79, no. 1, 2020, pp. 80-88.
Muscatello J, Flather D, Gjertsen J. Survival and Reproductive Effects in the Aquatic Invertebrate Ceriodaphnia dubia Exposed to Uranium Spiked Site Water Collected from Two Creeks in the Yukon, Canada. Arch Environ Contam Toxicol. 2020;79(1):80-88.
Muscatello, J., Flather, D., & Gjertsen, J. (2020). Survival and Reproductive Effects in the Aquatic Invertebrate Ceriodaphnia dubia Exposed to Uranium Spiked Site Water Collected from Two Creeks in the Yukon, Canada. Archives of Environmental Contamination and Toxicology, 79(1), 80-88. https://doi.org/10.1007/s00244-020-00740-z
Muscatello J, Flather D, Gjertsen J. Survival and Reproductive Effects in the Aquatic Invertebrate Ceriodaphnia Dubia Exposed to Uranium Spiked Site Water Collected From Two Creeks in the Yukon, Canada. Arch Environ Contam Toxicol. 2020;79(1):80-88. PubMed PMID: 32388663.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Survival and Reproductive Effects in the Aquatic Invertebrate Ceriodaphnia dubia Exposed to Uranium Spiked Site Water Collected from Two Creeks in the Yukon, Canada. AU - Muscatello,Jorgelina, AU - Flather,David, AU - Gjertsen,Jennie, Y1 - 2020/05/09/ PY - 2020/01/21/received PY - 2020/04/27/accepted PY - 2020/5/11/pubmed PY - 2020/8/1/medline PY - 2020/5/11/entrez SP - 80 EP - 88 JF - Archives of environmental contamination and toxicology JO - Arch Environ Contam Toxicol VL - 79 IS - 1 N2 - This study evaluates aqueous uranium (U) toxicity in Ceriodaphnia dubia exposed to surface water collected from two creeks located in U-rich areas of Yukon, Canada. Water for toxicity testing was collected at two times of the year to represent water quality characteristics generally observed during open-water (high flows) and winter baseflow water (low flows) seasons. Collected water was transferred to the toxicological laboratory and spiked with U to achieve nominal concentrations of 50, 150, 350, 500, 650, 800, and 1000 µg U/L. Toxicity endpoints included lethal concentrations (LC50) for survival, in addition to no observed effect concentration (NOEC) and lowest observed effect concentration (LOEC) for reproduction. All derived toxicity endpoints were significantly higher than applicable Canadian water-quality guidelines for U (15 μg/L [Chronic] and 33 μg/L [Acute]). No effects on C. dubia survival were observed at LC50 concentrations > 799 μg U/L. Derived NOEC (381 μg U/L) and LOEC (524 μg U/L) values also were significantly above chronic water quality guidelines. The differences noted in the toxicity response between seasons were mainly due to the presence of toxicity ameliorating factors for U (i.e., dissolved organic carbon). These results highlight the high conservatism in applicable water-quality guidelines and the crucial need to consider site-specific water characteristics when deriving environmentally relevant, yet protective thresholds for uranium in aquatic environments. SN - 1432-0703 UR - https://www.unboundmedicine.com/medline/citation/32388663/Survival_and_Reproductive_Effects_in_the_Aquatic_Invertebrate_Ceriodaphnia_dubia_Exposed_to_Uranium_Spiked_Site_Water_Collected_from_Two_Creeks_in_the_Yukon_Canada_ DB - PRIME DP - Unbound Medicine ER -