Climatic Influence on Temporal Trends of Polychlorinated Biphenyls and Organochlorine Pesticides in Landlocked Char from Lakes in the Canadian High Arctic

Cabrerizo, Ana; Muir, Derek C. G.; Köck, Günter; Iqaluk, Deborah; Wang, Xiaowa

doi:10.1021/acs.est.8b01860

Cited by 32 publications

(51 citation statements)

References 68 publications

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“…In navaga weighing between 0.125-0.380 kg, cis-chlordane accumulates to a greater extent ( Figure 5), indicating accumulation, and this is partly because old (large) fish have been exposed to cis-chlordane for a longer time than young (small) fish. However, in most fish samples, no statistically significant relationships between POP concentration and fish weight were found; the same results were observed by Cabrerizo et al [31].…”

Section: Correlation Analysissupporting

confidence: 86%

“…The amounts of mirex (0.04-0.13 ng/g (ww)) were practically at the same level as AMAP from 2004 [29] (<0.05-0.13 ng/g (ww)), which indicates its resistance to biodegrade. Compared with the landlocked char from lakes in the Canadian High Arctic reported by Ana Cabrerizo et al (2018) [31], the concentration of POP in the present study was significantly lower. Visually, the contents of the main analytes and POP groups are shown in Figure 3.…”

Section: Other Popscontrasting

confidence: 86%

“…Additionally, a strong positive relationship was observed between PCB#52 and PCB#128 (R = 0.726) and between PCB#128 and PCB#118,123 (R = 0.791). A strong positive correlation was However, in most fish samples, no statistically significant relationships between POP concentration and fish weight were found; the same results were observed by Cabrerizo et al [31].…”

Section: Correlation Analysissupporting

confidence: 83%

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Persistent Organic Pollutants (POPs) in Fish Consumed by the Indigenous Peoples from Nenets Autonomous Okrug

et al. 2019

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Currently, monitoring of persistent organic pollutant (POP) content in various biological and environmental matrixes in the Arctic is an urgent task. The present study focused on the determination of POPs such as: PCB#28, PCB#52, PCB#101, PCB#105, PCB#118, PCB#123, PCB#153, PCB#128, p,p’-DDE, o,p’-DDE, p,p’-DDD, o,p’-DDD, hexachlorobenzene (HCB), cis-nonachlor, trans-nonachlor, cis-chlordane, trans-chlordane, mirex, 1,2,3,5-tetrachlorobenzene and 1,2,4,5-tetrachlorobenzene in fish consumed by the indigenous people of the Nenets Autonomous Okrug (NAO) of the Russian Arctic. Fish samples were analyzed by gas chromatography triple quadrupole mass spectrometry (GC-MS/MS) using the multiple reaction monitoring (MRM) technique. The obtained results show that the major POPs in fish were dichlorodiphenyltrichloroethane (DDT) breakdown products and polychlorinated biphenyls (PCB) congeners. The ∑PCB8 in pink salmon, Arctic char, navaga, humpback whitefish and northern pike were 1.54, 1.58, 1.24, 0.72 and 0.32 ng/g (ww), respectively. The main PCB congeners maximum average medium concentrations were 0.68 ng/g (ww) and 0.51 ng/g (ww) of PCB#153 in navaga and PCB#128 in pink salmon, respectively. The main DDT breakdown product was p,p’-DDE. In Arctic char, pink salmon, navaga, humpback whitefish and northern pike, the concentration of p,p’-DDE was 0.58, 1.61, 0.49, 0.63 and 0.08 ng/g (ww), respectively. A moderate positive relationship between ∑PCB8 and lipid content and a high positive relationship between ∑DDT and lipid content were observed. In fish samples with fat content <0.5% (northern pike, humpback whitefish), the amount of analyzed POPs was 2 or more times lower than that in fish species with fat content >1% (pink salmon, Arctic char). Despite the large number of fish in the diet of indigenous peoples from NAO, no significant risks were identified. Most legacy POP and organochlorine pesticides (OCPs) tend to decrease, which can be explained by past national and regional bans and restriction on their use and emission.

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Section: Correlation Analysissupporting

confidence: 86%

Section: Other Popscontrasting

confidence: 86%

Section: Correlation Analysissupporting

confidence: 83%

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Persistent Organic Pollutants (POPs) in Fish Consumed by the Indigenous Peoples from Nenets Autonomous Okrug

et al. 2019

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“…Furthermore, a laboratory‐based dosing study with Arctic char is necessary to develop a species‐specific TEL. Future studies should also aim to increase our understanding of how contaminant mixtures affect wild Arctic char, given that previous research has reported varying levels of polychlorinated biphenyls (Cabrerizo et al ; Dietz et al ), organochlorine pesticides (Cleemann et al ; Cabrerizo et al ), and nonessential elements in the tissues of non‐anadromous Arctic char.…”

Section: Discussionmentioning

confidence: 99%

Screening‐level risk assessment of methylmercury for non‐anadromous Arctic char (Salvelinus alpinus)

Barst

Drevnick

Muir

et al. 2019

Enviro Toxic and Chemistry

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Non‐anadromous forms of Arctic char (Salvelinus alpinus), those that are restricted to lakes and rivers, typically have higher mercury (Hg) concentrations than anadromous forms, which migrate to and from the sea. Using tissue burden data from the literature and our own analyses, we performed a screening‐level risk assessment of methylmercury (MeHg) for non‐anadromous Arctic char. Our assessment included 1569 fish distributed across 83 sites. Site‐specific mean total Hg concentrations in non‐anadromous Arctic char muscle varied considerably from 0.01 to 1.13 µg/g wet weight, with 21% (17 of 83 sites) meeting or exceeding a threshold‐effect level in fish of 0.33 µg/g wet weight, and 13% (11 of 83 sites) meeting or exceeding a threshold‐effect level in fish of 0.5 µg/g wet weight. Of the sites in exceedance of the 0.33‐µg/g threshold, 7 were located in Greenland and 10 in Canada (Labrador, Nunavut, and Yukon). All but one of these sites were located in interfrost or permafrost biomes. Maximum total Hg concentrations exceeded 0.33 µg/g wet weight at 53% of sites (40 of the 75 sites with available maximum Hg values), and exceeded 0.5 µg/g wet weight at 27% (20 of 75 sites). Collectively, these results indicate that certain populations of non‐anadromous Arctic char located mainly in interfrost and permafrost regions may be at risk for MeHg toxicity. This approach provides a simple statistical assessment of MeHg risk to non‐anadromous Arctic char, and does not indicate actual effects. We highlight the need for studies that evaluate the potential toxic effects of MeHg in non‐anadromous Arctic char, as well as those that aid in the development of a MeHg toxic‐effect threshold specific to this species of fish. Environ Toxicol Chem 2019;38:489–502. © 2018 SETAC

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“…Although recovery from this eutrophication has occurred, these inputs affected both the chemical and microbial characteristics of Meretta Lake (Antoniades et al 2011). Furthermore, the proximity of both Meretta and Resolute Lakes to the local airport has altered their organic contaminant profiles when compared with more remote lakes in the area (Lescord et al 2015a;Cabrerizo et al 2018).…”

Section: Study Sitesmentioning

confidence: 99%

Assessing the utility of sulfur isotope values for understanding mercury concentrations in water and biota from high Arctic lakes

et al. 2019

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Methylmercury (MeHg) biomagnifies through aquatic food webs resulting in elevated concentrations in fish globally. Stable carbon and nitrogen isotopes are frequently used to determine dietary sources of MeHg and to model its biomagnification. However, given the strong links between MeHg and sulfur cycling, we investigated whether sulfur isotopes (δ34S) would improve our understanding of MeHg concentrations ([MeHg]) in Arctic lacustrine food webs. Delta34S values and total mercury (THg) or MeHg were measured in water, sediments, and biota from six lakes near Resolute Bay, NU, Canada. In two lakes impacted by historical eutrophication, aqueous sulfate δ34S was ∼8‰ more positive than sedimentary δ34S, suggestive of bacterial sulfate reduction in the sediment. In addition, aqueous δ34S showed a significant positive relationship with aqueous [MeHg] across lakes. Within taxa across lakes, [THg] in Arctic char muscle and [MeHg] in their main prey, chironomids, were positively related to their δ34S values across lakes, but inconsistent relationships were found across entire food webs among lakes. Across lakes, nitrogen isotopes were better predictors of biotic [THg] and [MeHg] than δ34S within this dataset. Our results suggest some linkages between Hg and S biogeochemistry in high Arctic lakes, which is an important consideration given anticipated climate-mediated changes in nutrient cycling.

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Climatic Influence on Temporal Trends of Polychlorinated Biphenyls and Organochlorine Pesticides in Landlocked Char from Lakes in the Canadian High Arctic

Cited by 32 publications

References 68 publications

Persistent Organic Pollutants (POPs) in Fish Consumed by the Indigenous Peoples from Nenets Autonomous Okrug

Persistent Organic Pollutants (POPs) in Fish Consumed by the Indigenous Peoples from Nenets Autonomous Okrug

Screening‐level risk assessment of methylmercury for non‐anadromous Arctic char (Salvelinus alpinus)

Assessing the utility of sulfur isotope values for understanding mercury concentrations in water and biota from high Arctic lakes

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