Exposure to methylmercury and inorganic mercury in the food does not lead to trophic magnification in the sea star Asterias rubens

Bjerregaard, Poul; Møller, Lise Marianne

doi:10.1016/j.envpol.2021.117401

Cited by 7 publications

(4 citation statements)

References 68 publications

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“…Indeed, D. antillarum, which generally consumes greater amounts of bacterial mats than A. bahianus (Pascal et al, 2017), has a lower ratio of increase in Hg (Figure 5), even if absolute concentrations in its muscle are significantly greater (Figure 1). This could be the result of much faster elimination rates of D. antillarum over A. bahianus, which has already been observed for other echinoderm and fish species (Bjerregaard & Møller, 2021). Concerning D. antillarum gonads, their significantly higher Hg concentration than in muscles in both sites reveals that Hg is preferentially accumulated in gonads (Figure 1).…”

Section: Mercury In Animals Of Bouillantesupporting

confidence: 58%

“…For example, Hg in livers of A. bahianus is ~80-fold higher than in livers of Interestingly, previous isotopic signature analyses (i.e. δ 15 N, δ 13 C & δ 34 S) showed that fish (A. bahianus & A. saxatilis) and sea urchin (D. antillarum), contrasting to filter feeders (i.e. I. birotulata, A. fistularis & S. tenuis), actively seek (i.e.…”

Section: Mercury In Animals Of Bouillantementioning

confidence: 89%

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Hydrothermal sulphur bacteria enhance mercury availability for coastal marine organisms

Ruiz

Lacoue-Labarthe

Brault‐Favrou

et al. 2022

Preprint

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The hydrothermal compounds massively released into the sea by the geothermal power plant of Bouillante (Guadeloupe, Lesser Antilles) support the growth of sulphur-oxidising bacteria like around black smokers. Opportunistic animals of the bay were previously shown to actively seek and consume the bacterial biofilm. To investigate the role of these bacterial mats in enhancing the transfer of Hg, a highly toxic heavy metal, its concentrations were assessed in sediments, bacteria, and 6 low trophic levels animals from the Bouillante Bay and a Control Site nearby containing only natural sources of Hg. Concentrations of Hg in all samples from Bouillante were greater than those from the Control Site (2 to 627 times higher). A comparison with the Hg concentrations reported in the literature for similar samples types reveals that they are abnormally high in most Bouillante samples. Although bacterial biofilm contained high levels of Hg, the link between bacteria contribution to diet and Hg concentration was more complex than expected, which might be due to interspecific differences in Hg uptake and elimination rates. Species not consuming bacteria (i.e. filter feeders) still presented higher levels of Hg, suggesting that significant amounts of Hg are released along with discharge waters from the Bouillante geothermal plant, and are integrated through diffusion. Differences in Hg concentrations between tissues do not indicate that Hg contained in samples from animals was under the form of MeHg, lowering the biomagnification potential of Hg in the Bouillante Bay trophic food web. Overall, the Bouillante case study emphasises for the first time an important role played by sulphur bacteria mats as a vector of hydrothermal inorganic Hg, and potentially other trace metals emitted in vents area, through dietary pathways.

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Section: Mercury In Animals Of Bouillantesupporting

confidence: 58%

Section: Mercury In Animals Of Bouillantementioning

confidence: 89%

Hydrothermal sulphur bacteria enhance mercury availability for coastal marine organisms

Ruiz

Lacoue-Labarthe

Brault‐Favrou

et al. 2022

Preprint

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“…3 Thus, establishing a sensitive detection technology for methylmercury is important and essential. 4 The current traditional methods for methylmercury detection include inductively coupled plasma mass spectrometry, 5 gas chromatography, high-performance liquid chromatography, etc. 6 These detection methods achieve high sensitivity and accurate detection at low concentrations, but their inherent disadvantages, such as complicated sample pretreatment, expensiveness, time consumption, the requirement for trained personnel for maintenance and analysis limit their wide applications.…”

Section: Introductionmentioning

confidence: 99%

“…Lipid-soluble methylmercury possesses the powerful ability to enter and accumulate in the human body along with the food chain, which has induced serious threats to environmental safety and human health, such as irreversible brain damage, various cognitive and motor disorders, Minamata disease, etc . Thus, establishing a sensitive detection technology for methylmercury is important and essential …”

Section: Introductionmentioning

confidence: 99%

Boric Acid Functional Fluorescent Covalent–Organic Framework for Sensitive and Selective Visualization of CH₃Hg⁺

Xiao

Nie

et al. 2023

ACS Appl. Mater. Interfaces

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Methylmercury (CH3Hg+) recognition remains a challenging and imperative task due to its high toxicity and wide existence in the ecosystem. Herein, a novel fluorescent covalent–organic framework containing a boric acid functional group (COF-BA) was prepared by a postmodification strategy for CH3Hg+ detection. COF-BA served as a sensing platform for CH3Hg+ with fluorescence static quenching accompanied by fluorescence color changing from intense blue to colorless, and the detection limit was determined as 1.68 μM in a relatively narrow concentration range. COF-BA also exhibited superior selectivity toward CH3Hg+ detection. Furthermore, the spiked and recovery test in real water samples showed its efficient detection practicality. The detection mechanism of COF-BA toward CH3Hg+ was investigated. The recognitive boric acid group in COF-BA was first replaced by CH3Hg+. Then, the quinoline structure that served to limit the rotation of the imine bond was disrupted, leading to dramatic fluorescence quenching. The boric acid functional COF fluorescent probe can be a promising sensing platform for the detection of methylmercury and also provides new ideas for the construction of new fluorescent COF materials.

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Food Web Structures and Mercury Exposure Pathway to Fish in Minamata Bay

Yoshino,

Yamada,

Kanaya

et al. 2023

Arch Environ Contam Toxicol

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Exposure to methylmercury and inorganic mercury in the food does not lead to trophic magnification in the sea star Asterias rubens

Cited by 7 publications

References 68 publications

Hydrothermal sulphur bacteria enhance mercury availability for coastal marine organisms

Hydrothermal sulphur bacteria enhance mercury availability for coastal marine organisms

Boric Acid Functional Fluorescent Covalent–Organic Framework for Sensitive and Selective Visualization of CH₃Hg⁺

Food Web Structures and Mercury Exposure Pathway to Fish in Minamata Bay

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Exposure to methylmercury and inorganic mercury in the food does not lead to trophic magnification in the sea star Asterias rubens

Cited by 7 publications

References 68 publications

Hydrothermal sulphur bacteria enhance mercury availability for coastal marine organisms

Hydrothermal sulphur bacteria enhance mercury availability for coastal marine organisms

Boric Acid Functional Fluorescent Covalent–Organic Framework for Sensitive and Selective Visualization of CH3Hg+

Food Web Structures and Mercury Exposure Pathway to Fish in Minamata Bay

Contact Info

Product

Resources

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Boric Acid Functional Fluorescent Covalent–Organic Framework for Sensitive and Selective Visualization of CH₃Hg⁺