Arsenic speciation in food chains from mid-Atlantic hydrothermal vents

Taylor, Vivien F.; Jackson, Brian P.; Siegfried, Matthew R.; Navrátilová, Jana; Francesconi, Kevin A.; Kirshtein, Julie D.; Voytek, Mary A.

doi:10.1071/en11134

Cited by 28 publications

(16 citation statements)

References 60 publications

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“…It has been shown that AsSugars are directly synthesized by phytoplankton (Edmonds et al 1997, Foster et al 2008, Duncan et al 2013, 2013, Duncan et al 2014) and the brown macroalgae Fucus serratus (Geiszinger et al 2001). AsSugars have also been found in deep sea vent mussels (Larsen et al 1997, Taylor et al 2012), which suggests a bacterial source of these compounds. However, neither the Fucus -associated fungi Fusarium oxysporum meloni isolated from Fucus gardneri (Granchinho et al 2002), nor the culturable bacteria associated with unicellular phytoplankton cultures (Duncan et al 2014), were found to transform As species.…”

Section: Sources and Distribution Of Organic As Species In Marine mentioning

confidence: 90%

Human exposure to organic arsenic species from seafood

Taylor

Goodale

Raab

et al. 2017

Science of The Total Environment

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387

256

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Seafood, including finfish, shellfish, and seaweed, is the largest contributor to arsenic (As) exposure in many human populations. In contrast to the predominance of inorganic As in water and many terrestrial foods, As in marine-derived foods is present primarily in the form of organic compounds. To date, human exposure and toxicological assessments have focused on inorganic As, while organic As has generally been considered to be non-toxic. However, the high concentrations of organic As in seafood, as well as the often complex As speciation, can lead to complications in assessing As exposure from diet. In this report, we evaluate the presence and distribution of organic As species in seafood, and combined with consumption data, address the current capabilities and needs for determining human exposure to these compounds. The analytical approaches and shortcomings for assessing these compounds are reviewed, with a focus on the best practices for characterization and quantitation. Metabolic pathways and toxicology of two important classes of organic arsenicals, arsenolipids and arsenosugars, are examined, as well as individual variability in absorption of these compounds. Although determining health outcomes or assessing a need for regulatory policies for organic As exposure is premature, the extensive consumption of seafood globally, along with the preliminary toxicological profiles of these compounds and their confounding effect on assessing exposure to inorganic As, suggests further investigations and process-level studies on organic As are needed to fill the current gaps in knowledge.

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Section: Sources and Distribution Of Organic As Species In Marine mentioning

confidence: 90%

Human exposure to organic arsenic species from seafood

Taylor

Goodale

Raab

et al. 2017

Science of The Total Environment

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387

256

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“…For example, the major arsenic species in shrimp from a mid-Atlantic vent is arsenobetaine, and in mussels, arsenic is present mainly as arsenosugars (Taylor et al 2012). Although little is known about the biosynthesis of these organic arsenicals, they are likely of vent origin, possibly synthesized by chemolithoautotrophic bacteria.…”

Section: Arsenic Methylation Cyclementioning

confidence: 99%

Earth Abides Arsenic Biotransformations

Zhu

Yoshinaga

Zhao

et al. 2014

Annu. Rev. Earth Planet. Sci.

469

340

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Arsenic is the most prevalent environmental toxic element and causes health problems throughout the world. The toxicity, mobility, and fate of arsenic in the environment are largely determined by its speciation, and arsenic speciation changes are driven, at least to some extent, by biological processes. In this article, biotransformation of arsenic is reviewed from the perspective of the formation of Earth and the evolution of life, and the connection between arsenic geochemistry and biology is described. The article provides a comprehensive overview of molecular mechanisms of arsenic redox and methylation cycles as well as other arsenic biotransformations. It also discusses the implications of arsenic biotransformation in environmental remediation and food safety, with particular emphasis on groundwater arsenic contamination and arsenic accumulation in rice.

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“…Temperature per se is a strong limiting factor (Cuvelier et al, 2011b), but it is also strongly linked to the presence of toxic compounds, such as oxygen radicals that can be formed after a redox reaction (Bebianno et al, 2005;Company et al, 2008), or metal and arsenic concentrations that can be filtered by mussels (Martins et al, 2011;Taylor et al, 2012). In addition, high fluctuations in the hydrothermal/seawater mixing ratio may be the cause of hypoxic periods for B. azoricus, which settles at the interface of the two fluids.…”

Section: Niche Of Bathymodiolus Azoricusmentioning

confidence: 99%

Picturing thermal niches and biomass of hydrothermal vent species

Husson¹,

Sarradin²,

Zeppilli³

et al. 2017

Deep Sea Research Part II: Topical Studies in Oceanography

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In community ecology, niche analysis is a classic tool for investigating species' distribution and dynamics. Components of a species' niche include biotic and abiotic factors.In the hydrothermal vent ecosystem, although composition and temporal variation have been investigated since these deep-sea habitats were discovered nearly 40 years ago, the roles and the factors behind the success of the dominant species of these ecosystems have yet to be fully elucidated. In the Lucky Strike vent field on the Mid Atlantic Ridge (MAR), the dominant species is the mussel Bathymodiolus azoricus. Data on this species and its associated community were collected during four oceanographic cruises on the Eiffel Tower edifice and integrated in a novel statistical framework for niche analysis. We assessed the thermal range, density, biomass and niche similarities of B. azoricus and its associated fauna.Habitat similarities grouped mussels into three size categories: mussels with lengths ranging from 0.5 to 1.5 cm, from 1.5 to 6 cm, and mussels longer than 6 cm. These size categories were consistent with those found in previous studies based on video imagery. The three size categories featured different associated fauna. The thermal range of mussels was shown to change with organism size, with intermediate sizes having a broader thermal niche than small or large mussels. Temperature maxima seem to drive their distribution along the mixing gradient between warm hydrothermal fluids and cold seawater. B. azoricus constitutes nearly 90% of the biomass (in g dry weight /m²) of the ecosystem. Mean individual weights were calculated for 39 of the 79 known taxa on Eiffel Tower and thermal ranges were obtained for all the inventoried species of this edifice. The analysis showed that temperature is a suitable variable to describe density variations among samples for 71 taxa. However, thermal conditions do not suffice to explain biomass variability. Our results provide valuable insight into mussel ecology, biotic interactions and the role of B. azoricus in the community.

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Arsenic speciation in food chains from mid-Atlantic hydrothermal vents

Cited by 28 publications

References 60 publications

Human exposure to organic arsenic species from seafood

Human exposure to organic arsenic species from seafood

Earth Abides Arsenic Biotransformations

Picturing thermal niches and biomass of hydrothermal vent species

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