Climate change and mercury in the Arctic: Abiotic interactions

The Science of The Total Environment, Год журнала: 2022, Номер 824, С. 153715 - 153715

Опубликована: Фев. 9, 2022

Dramatic environmental shifts are occuring throughout the Arctic from climate change, with consequences for cycling of mercury (Hg). This review summarizes latest science on how change is influencing Hg transport and biogeochemical in terrestrial, freshwater marine ecosystems. As changes continue to accelerate, a clearer picture emerging profound cryosphere, their connections cycling. Modeling results suggest influences seasonal interannual variability atmospheric deposition. The clearest evidence current effects terrestrial catchments, where widespread permafrost thaw, glacier melt coastal erosion increasing export downstream environments. Recent estimates large global reservoir Hg, which vulnerable degradation warming, although fate soil unclear. development thermokarst features, formation expansion thaw lakes, increased landscapes river particulate-bound altering conditions aquatic transformations. Greater organic matter may also be Hg. More severe frequent wildfires within across boreal regions contributing pool Climate remain poorly understood. Seasonal evasion retention inorganic altered by reduced sea-ice cover higher chloride content snow. Experimental indicates warmer temperatures enhance methylmercury production ocean lake sediments as well tundra soils. Improved geographic coverage measurements modeling approaches needed better evaluate net long-term implications contamination Arctic.

Язык: Английский

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Global mercury concentrations in biota: their use as a basis for a global biomonitoring framework

Ecotoxicology, Год журнала: 2024, Номер 33(4-5), С. 325 - 396

Опубликована: Апрель 29, 2024

Abstract An important provision of the Minamata Convention on Mercury is to monitor and evaluate effectiveness adopted measures its implementation. Here, we describe for first time currently available biotic mercury (Hg) data a global scale improve understanding efforts reduce impact Hg pollution people environment. Data from peer-reviewed literature were compiled in Global Biotic Synthesis (GBMS) database (>550,000 points). These provide foundation establishing biomonitoring framework needed track concentrations biota globally. We exposure taxa identified by Convention: fish, sea turtles, birds, marine mammals. Based GBMS database, are presented at relevant geographic scales continents oceanic basins. identify some effective regional templates monitoring methylmercury (MeHg) availability environment, but overall illustrate that there general lack initiatives around world, especially Africa, Australia, Indo-Pacific, Middle East, South Atlantic Pacific Oceans. Temporal trend generally limited. Ecologically sensitive sites (where have above average MeHg tissue concentrations) been throughout world. Efforts model quantify ecosystem sensitivity locally, regionally, globally could help establish efficient programs. present network includes three-step continental approach integrate existing prioritize filling gaps linked with key sources. standardized builds an evidence-based evaluation assess Convention’s progress

Язык: Английский

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The impact of mercury contamination on human health in the Arctic: A state of the science review

The Science of The Total Environment, Год журнала: 2022, Номер 831, С. 154793 - 154793

Опубликована: Март 25, 2022

Язык: Английский

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Temporal trends of mercury in Arctic biota: 10 more years of progress in Arctic monitoring

The Science of The Total Environment, Год журнала: 2022, Номер 839, С. 155803 - 155803

Опубликована: Май 10, 2022

Язык: Английский

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Advancing exposure assessment approaches to improve wildlife risk assessment

Integrated Environmental Assessment and Management, Год журнала: 2023, Номер 20(3), С. 674 - 698

Опубликована: Янв. 23, 2023

The exposure assessment component of a Wildlife Ecological Risk Assessment aims to estimate the magnitude, frequency, and duration chemical or environmental contaminant, along with characteristics exposed population. This can be challenging in wildlife as there is often high uncertainty error caused by broad-based, interspecific extrapolation assumptions because lack data. Both US Environmental Protection Agency (USEPA) European Food Safety Authority (EFSA) have broadly directed assessments include estimates quantity (dose concentration), contaminant interest while considering "all relevant factors." ambiguity inclusion exclusion specific factors (e.g., individual species-specific biology, diet, proportion time treated contaminated area) significantly influence overall risk characterization. In this review, we identify four discrete categories complexity that should considered an assessment-chemical, environmental, organismal, ecological. These may require more data, but degree at all stages critical moving beyond screening-level methods suffer from conservatism realism. We demonstrate are many existing emerging scientific tools cross-cutting solutions for tackling complexity. To foster greater application these assessments, present new framework assessors construct "exposure matrix." Using three case studies, illustrate how matrix better inform, integrate, transparently communicate important elements realism wildlife. Modernizing long overdue will improved collaboration, data sharing, standardized scenarios, communication uncertainty, postregulatory tracking. Integr Environ Assess Manag 2024;20:674-698. © 2023 SETAC.

Язык: Английский

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Contributions and perspectives of Indigenous Peoples to the study of mercury in the Arctic

The Science of The Total Environment, Год журнала: 2022, Номер 841, С. 156566 - 156566

Опубликована: Июнь 11, 2022

Arctic Indigenous Peoples are among the most exposed humans when it comes to foodborne mercury (Hg). In response, Hg monitoring and research have been on-going in circumpolar since about 1991; this work has mainly possible through involvement of Peoples. The present overview was initially conducted context a broader assessment organized by Monitoring Assessment Programme. This article provides examples Peoples' contributions Arctic, discusses approaches that could be used, improved upon, carrying out future activities. Over 40 projects with/by identified for different regions including U.S., Canada, Greenland, Sweden, Finland, Russia as well instances where Knowledge contributed understanding contamination Arctic. Perspectives visions recommendations presented. establishment collaborative processes partnership/co-production with scientists Peoples, using good communication practices transparency activities, key success activities Sustainable funding community-driven programs countries would beneficial assist developing more research/monitoring capacity promote holistic approach These should connected circumpolar/international initiatives ensure availability information uptake policy development.

Язык: Английский

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Co-considering Selenium Concentrations Alters Mercury-Based Fish and Seafood Consumption Advice: A Data Compilation and Critical Assessment

Environmental Science & Technology Letters, Год журнала: 2023, Номер 10(2), С. 179 - 185

Опубликована: Фев. 3, 2023

There has been persistent interest in the mediating role of micronutrient selenium (Se) mercury (Hg) toxicity since 1960s. Despite many unresolved questions regarding Se–Hg interactions, considerable research performed to document Se:Hg molar ratios aquatic animals as a basis for inferring health risks associated with their consumption. We compiled co-reported Se and Hg data 386 shellfish, finfish, mammals from 89 papers assess differences consumption safety categorizations according risk metrics that (a) consider concentrations alone or (b) co-consider concentrations. Species-specific mean 23% all points our database exceeded FAO/WHO maximum level, 68% 83% had estimated daily intake per meal values adults children above Joint Expert Committee on Food Additives Provisional Tolerable Daily Index. In contrast, only 12% would be categorized unsafe 1:1 ratios. Se-inclusive reversed majority high-trophic level species are most likely exceed Hg-based thresholds. Adopting potentially significant implications seafood consumer is premature.

Язык: Английский

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Stable isotopes and a changing world

Oecologia, Год журнала: 2023, Номер 203(3-4), С. 233 - 250

Опубликована: Май 26, 2023

Язык: Английский

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Bioremediation of mercury contaminated soil and water: A review

Land Degradation and Development, Год журнала: 2023, Номер 35(4), С. 1261 - 1283

Опубликована: Ноя. 30, 2023

Abstract Mercury (Hg) pollution of soil and water environments is a major global threat to human health, agri‐food systems ecosystems industrial activities mainly coal combustion augmented their content in different environmental media. Bioremediation nature‐based solution involving microbial‐ plant‐based (phytoremediation) technologies that clean‐up Hg contaminated sites. Here, we review Hg‐resistant bacteria how latest insights our understanding the cellular biochemical mechanisms mer operon genes responsible for resistance transformation have facilitated developments microbial Hg‐bioremediation. We also phytoremediation mechanisms, including those bacterial‐ fungi‐assisted processes, which shown promising results reducing 2+ 0 . This provides detailed knowledge novel bioremediation methods. Consequently, phyto‐based critical role reclamation Hg‐contaminated protection health ecosystems.

Язык: Английский

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Does mercury biomagnification in a boreal lake food web vary year-round? – A comparison using bulk δ15N and compound-specific δ15N of amino acids

Environmental Pollution, Год журнала: 2025, Номер unknown, С. 125933 - 125933

Опубликована: Фев. 1, 2025

Язык: Английский

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