Research Progress of Mercury Bioaccumulation in the Aquatic Food Chain, China: A Review

Yan, Haiyu; Li, Qiuhua; Yuan, Zhenhui; Jin, Shuang; Min, Jiyoung

doi:10.1007/s00128-019-02629-7

Cited by 30 publications

(11 citation statements)

References 75 publications

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“…Total Hg and MMHg concentrations. Total Hg concentrations in trench amphipods have an average of 547 ± 230 ng g −1 (1 SD, 235 to 1070 ng g −1 , dry weight, Supplementary Table 1), which is comparable to their counterparts from the abyssal Arctic Ocean (250-1000 ng g −1 ) 33 , but considerably higher than benthic organisms in freshwater and coastal ecosystems (mostly <400 ng g −1 on average) 34,35 . The relatively high Hg concentrations in trench amphipods likely relate to their low tissue turnover rates and long life spans 36,37 .…”

Section: Resultsmentioning

confidence: 83%

Methylmercury produced in upper oceans accumulates in deep Mariana Trench fauna

et al. 2020

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is a potent toxin that bioaccumulates and magnifies in marine food webs. Recent studies show abundant methylated Hg in deep oceans (>1000 m), yet its origin remains uncertain. Here we measured Hg isotope compositions in fauna and surface sediments from the Mariana Trench. The trench fauna at 7000-11000 m depth all have substantially positive mass-independent fractionation of odd Hg isotopes (odd-MIF), which can be generated only in the photic zone via MMHg photo-degradation. Given the identical odd-MIF in trench fauna and North Pacific upper ocean (<1000 m) biota MMHg, we suggest that the accumulated Hg in trench fauna originates exclusively from MMHg produced in upper oceans, which penetrates to depth by sorption to sinking particles. Our findings reveal little in-situ MMHg production in deep oceans and imply that anthropogenic Hg released at the Earth's surface is much more pervasive across deep oceans than was previously thought.

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Section: Resultsmentioning

confidence: 83%

Methylmercury produced in upper oceans accumulates in deep Mariana Trench fauna

et al. 2020

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“…En Colombia, el Hg ha sido ampliamente utilizado en el proceso de amalgamación de la minería de oro (Cordy et al, 2011). Este metal, es bioacumulado por organismos acuáticos y biomagnificado a través de la cadena alimenticia (González et al, 2015;Yan et al, 2019). El mercurio genera fuertes efectos toxicológicos sobre la membrana celular como consecuencia de su habilidad para cruzar las membranas y afectar los sistemas de metabolismo celular (Anvarifar et al, 2018).…”

Section: Discussionunclassified

“…El metilmercurio (MeHg) es considerado como EPT y puede llegar a los ecosistemas acuáticos desde fuentes antrópicas como la minería aurífera, ocasionando efectos adversos debido a su alta toxicidad (González et al, 2015). En el medio acuático, el Hg es fácilmente transformado en MeHg, su forma orgánica, con un alto potencial de bioacumulación en los organismos y biomagnificación en la cadena alimenticia (Yan et al, 2019). El MeHg puede llegar a tener extrema toxicidad incluso en bajas concentraciones, lo que produce efectos subletales o muertes en poblaciones de peces nativas (Jasim et al, 2016).…”

Section: Introductionunclassified

Concentraciones de metilmercurio en Prochilodus magdalenae (Teleostei: Curimatidae) y Hoplias malabaricus (Teleostei: Erythrinidae) en la cuenca baja del río Cauca-Magdalena, norte de Colombia

Cruz-Esquivel¹,

Negrete²

2021

Acta biol. Colomb.

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Las emisiones de mercurio (Hg) a partir de actividades de minería afectan los recursos pesqueros, los cuales son importantes en la alimentación proteínica de las poblaciones humanas. El objetivo de este estudio fue analizar las concentraciones de MeHg (metilmercurio) en Prochilodus magdalenae (Bocachico) y Hoplias malabaricus (Moncholo) en hábitats continentales de la región de La Mojana y en la parte baja del río Cauca (Norte de Colombia), sitios que han sido afectados por actividades de minería aurífera. Un total de 160 ejemplares fueron colectados para su respectivo análisis, 130 en el grupo expuesto: Mojana 1 (n=36), Mojana 2 (n=56) y El Bajo Cauca (n=38), y n=30 en el grupo control. Se realizaron las determinaciones de MeHg mediante análisis directo con un Analizador Directo de Mercurio DMA 80, cromatografía líquida y espectrometría de absorción atómica. Las concentraciones de MeHg encontradas en muestras de tejido del músculo dorsal de los peces procedentes de los lugares expuestos, fueron significativamente mayores comparados con el grupo control (p< 0.05), siendo la región del Bajo Cauca la más afectada por altas concentraciones de MeHg. Los resultados indican que la presencia de MeHg en los peces es consecuencia de las actividades de minería aurífera ampliamente desarrolladas en la zona. Estas concentraciones MeHg representan un riesgo mortal para la salud humana y animal.

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“…The critical point for fish contamination is Hg cycling in the Aquatic Ecosystems, where this metal is converted into its organic forms, mainly MeHg, by anaerobic microorganisms. This form, in turn, enters the aquatic trophic network via plankton and it tends to accumulate in biota in the passage through small fish, reaching its greatest concentration in carnivorous fish at the top of the food chain [ 36 ] due to the so-called process of biomagnification [ 136 ]. Importantly, only Hg biomagnifies in the food chain [ 137 ].…”

Section: Nutritional Aspects Of Mercury Toxicitymentioning

confidence: 99%

Erythrocytes as a Model for Heavy Metal-Related Vascular Dysfunction: The Protective Effect of Dietary Components

Notariale

Infantino

Palazzo

et al. 2021

IJMS

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Heavy metals are toxic environmental pollutants associated with severe ecological and human health risks. Among them is mercury (Hg), widespread in air, soil, and water, due to its peculiar geo-biochemical cycle. The clinical consequences of Hg exposure include neurotoxicity and nephrotoxicity. Furthermore, increased risk for cardiovascular diseases is also reported due to a direct effect on cardiovascular tissues, including endothelial cells, recently identified as important targets for the harmful action of heavy metals. In this review, we will discuss the rationale for the potential use of erythrocytes as a surrogate model to study Hg-related toxicity on the cardiovascular system. The toxic effects of Hg on erythrocytes have been amply investigated in the last few years. Among the observed alterations, phosphatidylserine exposure has been proposed as an underlying mechanism responsible for Hg-induced increased proatherogenic and prothrombotic activity of these cells. Furthermore, following Hg-exposure, a decrease in NOS activity has also been reported, with consequent lowering of NO bioavailability, thus impairing endothelial function. An additional mechanism that may induce a decrease in NO availability is the generation of an oxidative microenvironment. Finally, considering that chronic Hg exposure mainly occurs through contaminated foods, the protective effect of dietary components is also discussed.

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Research Progress of Mercury Bioaccumulation in the Aquatic Food Chain, China: A Review

Cited by 30 publications

References 75 publications

Methylmercury produced in upper oceans accumulates in deep Mariana Trench fauna

Methylmercury produced in upper oceans accumulates in deep Mariana Trench fauna

Concentraciones de metilmercurio en Prochilodus magdalenae (Teleostei: Curimatidae) y Hoplias malabaricus (Teleostei: Erythrinidae) en la cuenca baja del río Cauca-Magdalena, norte de Colombia

Erythrocytes as a Model for Heavy Metal-Related Vascular Dysfunction: The Protective Effect of Dietary Components

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