Special Issue on Bioconversion, Bioaccumulation and Toxicity of Mercury in a Changing World

Cosio, Claudia

doi:10.3390/app10186548

Cited by 4 publications

(3 citation statements)

References 6 publications

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“…CH3Hg + then moves further up the freshwater food chain via aquatic plant roots and reaches fish trophic levels, where it bioaccumulates and biomagnifies in higher concentrations in the tissues of top predators. This feeding habit as well as the uptake of aqueous CH3Hg + from fish gills is expected to cause high bioaccumulation in the liver, brain, and muscle, with the latter pathway directly affecting the cardiovascular system [ 27 ]. High levels of CH3Hg + affects cellular function, leading to irreversible neurological damage in animals and humans [ 28 , 29 ].…”

Section: Introductionmentioning

confidence: 99%

Trends in Mercury Contamination Distribution among Human and Animal Populations in the Amazon Region

Martoredjo,

Calvão Santos,

Vilhena

et al. 2024

Toxics

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Mercury contamination in the Amazon arising from both natural sources and intensive mining activities in the region is a significant public health concern. This metal is used to separate Au from sediments. Accordingly, this study aimed to assess the impact of mining on mercury contamination in the animal and human populations of the Amazon. This overall objective was pursued through a systematic review of the existing literature to assess the impact of Hg and identify gaps in geographic coverage arising from this assessment. Herein, we employed PECO and PRISMA-ScR protocols to select articles published between 2017 and 2023 based on projected points on a map within the biogeographic boundaries of the Amazon. We found that mercury concentrations increase with trophic levels, reaching high values of 3.7 µg/g in the muscles of predatory fish and 34.9 µg/g in human hair. The mean level of mercury in human hair in the whole (Amazon) region exceeds 6 µg/g, surpassing tolerance levels. Although mining regions show high concentrations of Hg, the highest incidence was observed among populations with fish-based diets. It was concluded that continuous research and monitoring of fish in the region are required in order to accurately assess the risk associated with Hg contamination, especially since fish are the main source of protein in this region.

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Section: Introductionmentioning

confidence: 99%

Trends in Mercury Contamination Distribution among Human and Animal Populations in the Amazon Region

Martoredjo,

Calvão Santos,

Vilhena

et al. 2024

Toxics

View full text Add to dashboard Cite

show abstract

“…CH3Hg + then moves further up the freshwater food chain by aquatic plant roots and reaches fish trophic levels, where it bioaccumulates and biomagnifies in higher concentrations in the tissues of top predators. This feeding habit as well as the uptake of aqueous CH3Hg + from fish gills is expected to cause high bioaccumulation in liver, brain and muscle, the latter pathway directly affecting the cardiovascular system [27]. High levels of CH3Hg + affects cellular function leading to irreversible neurological damage in animals and humans [28,29].…”

Section: Introductionmentioning

confidence: 99%

Trends in Mercury Contamination Distribution among Human and Animal Populations in the Amazon

Martoredjo,

Calvão Santos,

Vilhena

et al. 2024

Preprint

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Mercury contamination in the Amazon is a significant public health concern arising from both natural sources and intensive mining activities in the region. This metal is used to separate Au from sediments, forming an amalgam that facilitates the extraction of precious metals. Accordingly, this study aimed to address the following question: What is the impact of mining on mercury contamination in the animal and human populations of the Amazon? The overall objective of this study was to conduct a systematic review of the existing literature to identify gaps in geographic coverage and assess the impact of Hg contamination on human and animal populations in the Amazon region. Our hypothesis was that higher mercury concentrations in tissue samples would be found closer to the mining areas. We employed the PECO and PRISMA-ScR protocols to collect articles published between 2017 and 2023, selected based on criteria representing projected points on a map within the biogeographic boundaries of the Amazon. Mercury concentrations increase with trophic levels, reaching high values of 3.7 µg/g in the muscles of predatory fish and 34.9 µg/g in human hair. The average level of mercury in humans exceeds 6 µg/g, surpassing tolerance levels. Although mining regions show high concentrations of Hg, the highest incidence was observed among populations with fish-based diets. Research on fish is crucial for assessing the risk to human health, given that fish are the main source of protein in the region.

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“…Mercury (Hg) is a potent neurotoxin that can bioaccumulate and biomagnify in food webs, making it an ecological and public health concern (Arctic Monitoring and Assessment Programme, 2011; Cosio, 2020; Driscoll et al, 2007). Large emissions from anthropogenic activities over the postindustrialization period are the primary sources of Hg pollution (Streets et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Ecological Drivers of Mercury Bioaccumulation in Fish of a Subarctic Watercourse

Amundsen

Henriksson

Poste

et al. 2023

Enviro Toxic and Chemistry

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Mercury (Hg) is a serious concern for aquatic ecosystems because it may biomagnify to harmful concentrations within food webs and consequently end up in humans that eat fish. However, the trophic transfer of mercury through the aquatic food web may be impacted by several factors related to network complexity and the ecology of the species present. The present study addresses the interplay between trophic ecology and mercury contamination in the fish communities of two lakes in a pollution‐impacted subarctic watercourse, exploring the role of both horizontal (feeding habitat) and vertical (trophic position) food web characteristics as drivers for the Hg contamination in fish. The lakes are located in the upper and lower parts of the watercourse, with the lower site located closer to, and downstream from, the main pollution source. The lakes have complex fish communities dominated by coregonids (polymorphic whitefish and invasive vendace) and several piscivorous species. Analyses of habitat use, stomach contents, and stable isotope signatures (δ15N, δ13C) revealed similar food web structures in the two lakes except for a few differences chiefly related to ecological effects of the invasive vendace. The piscivores had higher Hg concentrations than invertebrate‐feeding fish. Concentrations increased with size and age for the piscivores and vendace, whereas habitat differences were of minor importance. Most fish species showed significant differences in Hg concentrations between the lakes, the highest values typically found in the downstream site where the biomagnification rate also was higher. Mercury levels in piscivorous fish included concentrations that exceed health authorization limits, with possible negative implications for fishing and human consumption. Our findings accentuate the importance of acquiring detailed knowledge of the drivers that can magnify Hg concentrations in fish and how these may vary within and among aquatic systems, to provide a scientific basis for adequate management strategies. Environ Toxicol Chem 2023;42:873–887. © 2023 SETAC

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Special Issue on Bioconversion, Bioaccumulation and Toxicity of Mercury in a Changing World

Abstract: Mercury (Hg) is recognized as a persistent global chemical contaminant that accumulates in biota, thus being an ecological hazard, as well as a health risk to fish consumers [...]

Cited by 4 publications

References 6 publications

Trends in Mercury Contamination Distribution among Human and Animal Populations in the Amazon Region

Trends in Mercury Contamination Distribution among Human and Animal Populations in the Amazon Region

Trends in Mercury Contamination Distribution among Human and Animal Populations in the Amazon

Ecological Drivers of Mercury Bioaccumulation in Fish of a Subarctic Watercourse

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