Co-exposures to trace elements and polycyclic aromatic compounds (PACs) impacts North American river otter (Lontra canadensis) baculum

Thomas, Philippe J.; Newell, Emily; Eccles, Kristin M.; Holloway, Alison C.; Idowu, Ifeoluwa; Xia, Zhe; Hassan, Elizabeth; Tomy, Gregg T.; Quenneville, Cheryl E.

doi:10.1016/j.chemosphere.2020.128920

Cited by 16 publications

(17 citation statements)

References 59 publications

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“…The analysis of polycyclic aromatic compounds (PACs) on this sediment core showed high levels of petrogenic PACs (compared with three other lakes studied in the AOSR) that increased steadily since the 1980s. 34 Interestingly, the surface sediment layer (0−1 cm) had a different δ 51 V value (−0.1‰), which was ∼0.5‰ higher and comparable to δ 51 V values for bitumen and petroleum coke. It is possible that the vanadium in this layer originated from industrial petrogenic sources, although additional investigation is required to confirm this single measurement.…”

Section: ■ Materials and Methodsmentioning

confidence: 75%

“…As with the observations for lichens, the sediment δ 51 V values suggest that vanadium deposition in the AOSR was primarily associated with crustal sources, possibly from deposition of fine clay particulates, even though Saline Lake is relatively close to an oil sands upgrader facility and tailings ponds (∼5–7 km away). The analysis of polycyclic aromatic compounds (PACs) on this sediment core showed high levels of petrogenic PACs (compared with three other lakes studied in the AOSR) that increased steadily since the 1980s . Interestingly, the surface sediment layer (0–1 cm) had a different δ 51 V value (−0.1‰), which was ∼0.5‰ higher and comparable to δ 51 V values for bitumen and petroleum coke.…”

Section: Results and Discussionmentioning

confidence: 86%

“…Five sectioned layers were analyzed for δ 51 V to examine vanadium sources to the lake over the last ∼120 years (0–1 cm; year 2014, 2–2.5 cm; year 2007, 6–6.5 cm; year 1989, 10–10.5 cm; year 1950, and 14–14.5 cm depth; year 1896). The sediment core chronology was determined with radioisotope measurements ( 210 Pb, 137 Cs, and 226 Ra) and is reported elsewhere . Sediment and biological samples from Great Slave Lake were previously collected in a study of metal(loid) concentrations in the aquatic food chain.…”

Section: Methodsmentioning

confidence: 99%

“…The sediment core chronology was determined with radioisotope measurements ( 210 Pb, 137 Cs, and 226 Ra) and is reported elsewhere. 34 Sediment and biological samples from Great Slave Lake were previously collected in a study of metal(loid) concentrations in the aquatic food chain. The original objective of that study was to investigate the food chain contamination from gold mining, although vanadium was not enriched in the receiving environment.…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

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Vanadium Stable Isotopes in Biota of Terrestrial and Aquatic Food Chains

Chételat

Nielsen

Auro

et al. 2021

Environ. Sci. Technol.

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Vanadium, a potentially toxic metal, is enriched in the environment from anthropogenic releases, particularly during fossil fuel production and use and steel manufacturing. Metal stable isotopes are sophisticated tools to trace pollution; however, only recent analytical advances have allowed for the accurate and precise measurement of vanadium isotope ratios (δ51V). To examine its potential as a tracer in terrestrial and aquatic ecosystems, δ51V was measured in soil, plant, lichen, marten, and lake sediment from sites near vanadium emissions at oil sands mines (Alberta, Canada) and in the sediment and biota (algae, zooplankton, fish) from a remote subarctic lake (Northwest Territories, Canada). Samples from Alberta had distinct δ51V values with marten liver the lowest (−1.7 ± 0.3‰), followed by lichen (−0.9 ± 0.1‰), soil (−0.7 ± 0.1‰), sediment (−0.5 ± 0.2‰), and plant root (−0.3 ± 0.2‰). Average values were lower than Alberta bitumen and petroleum coke (−0.1 ± 0.1‰). Plant roots had systematically higher δ51V than the soil from which they grew (Δ51Vplant‑soil = 0.4 ± 0.1‰), while δ51V of lichen and aquatic biota were lower (0.1–0.3‰) than likely crustal sources. These δ51V measurements in terrestrial and aquatic biota demonstrate promise for tracer applications, although further study of its biological fractionation is needed.

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Section: ■ Materials and Methodsmentioning

confidence: 75%

Section: Results and Discussionmentioning

confidence: 86%

Section: Methodsmentioning

confidence: 99%

Section: ■ Materials and Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Vanadium Stable Isotopes in Biota of Terrestrial and Aquatic Food Chains

Chételat

Nielsen

Auro

et al. 2021

Environ. Sci. Technol.

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“…This concentration range was selected based on reported DBT levels in biota. DBT levels in tissues from mammals that died as a result of exposure to crude oil following the Exxon Valdez spill range from approximately 4 to 10 nM (Ballachey & Kloecker, 1997), and concentrations in molluscs and river otters collected near the sites of active bitumen extraction in Northern Alberta ranged from 0.01–1 nM (Idowu et al, 2018; Thomas, 2020). After 48 h, media were collected and stored at −80°C for steroid analysis.…”

Section: Methodsmentioning

confidence: 99%

Effects of dibenzothiophene, a sulfur‐containing heterocyclic aromatic hydrocarbon, and its alkylated congener, 2,4,7‐trimethyldibenzothiophene, on placental trophoblast cell function

Raez-Villanueva

Perono

Jamshed

et al. 2020

J of Applied Toxicology

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Worldwide demand for petroleum products has resulted in increased oil and gas activities in many countries. Conventional and unconventional oil and gas extraction, production, and transport lead to increased levels of petroleum‐derived polycyclic aromatic hydrocarbons (PAHs) in the environment. PAH exposure has profound effects on reproduction by affecting pathways involved in placental trophoblast cell function and impairing normal placental development and function—key contributors to reproductive success. However, other components found in petroleum and wastewaters from oil and gas extraction, including the sulfur‐containing heterocyclic aromatic compounds such as dibenzothiophene (DBT) and its alkylated derivatives, may also impact reproductive success. The goal of this study was to examine the effect of exposure to DBT, a compound commonly detected in the environment, and one of its alkylated analogues, 2,4,7‐trimethyldibenzothiophene (2,4,7‐DBT), on steroidogenic and angiogenic pathways critical for mammalian development in placental trophoblast cells (HTR‐8/SVneo cells). 2,4,7‐DBT but not DBT increased estradiol output in association with increased tube‐like formation (surrogate for angiogenesis). These changes in angiogenesis did not appear to be related to altered expression of the key placental angiogenic gene targets (ANGPTL4, VEGFA, and PGF). Neither compound showed a concentration related effect on progesterone synthesis or its receptor expression. Our results suggest that 2,4,7‐DBT can disrupt key pathways important for placental trophoblast function and highlight the importance of determining the impact of exposure to both parent and alkylated compounds. Further, these data suggest that exposure to sulfur‐containing heterocyclic aromatic compounds may lead to placental dysfunction and impact reproductive success at environmentally relevant levels.

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An integrated knowledge synthesis of regional ambient monitoring in Canada's oil sands

Roberts

Hazewinkel

Arciszewski

et al. 2021

Integr Envir Assess & Manag

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This article is part of the special series "A Decade of Research and Monitoring in the Oil Sands Region of Alberta, Canada." The series documents the history of monitoring in the region and critically reviews a synthesis of monitoring results published within key environmental theme areas to identify patterns of consistent responses or effects; significant gaps in knowledge; and recommendations for improved monitoring, assessment, and management of the region.

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Co-exposures to trace elements and polycyclic aromatic compounds (PACs) impacts North American river otter (Lontra canadensis) baculum

Cited by 16 publications

References 59 publications

Vanadium Stable Isotopes in Biota of Terrestrial and Aquatic Food Chains

Vanadium Stable Isotopes in Biota of Terrestrial and Aquatic Food Chains

Effects of dibenzothiophene, a sulfur‐containing heterocyclic aromatic hydrocarbon, and its alkylated congener, 2,4,7‐trimethyldibenzothiophene, on placental trophoblast cell function

An integrated knowledge synthesis of regional ambient monitoring in Canada's oil sands

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