Arsenic concentrations and species in three hydrothermal vent worms, Ridgeia piscesae, Paralvinella sulficola and Paralvinella palmiformis

Bill MAHER, Elliott Duncan, Geoffrey Dilly, Simon FOSTER, E. Lombi, Kirk Scheckel, Peter Girguis

    Research output: Contribution to journalArticle

    3 Citations (Scopus)

    Abstract

    Hydrothermal vents are surficial expressions of subsurface geological and hydrological processes. Fluids emitting from active vents are chemically distinct from bottom seawater, and are enriched in dissolved metals and metalloids, including arsenic. Vent organisms accumulate arsenic but the arsenic speciation in these non-photosynthetic organisms is largely unknown. Here, arsenic concentrations and chemical species were measured in three deep sea hydrothermal vent worms (Ridgeia piscesae, Paralvinella sulfincola and Paralvinella palmiformis ) from the Juan de Fuca Ridge in the Northwest pacific. R. piscesae has similar arsenic concentrations (3.8–35 µg g-1) to shallow water polychaetes while P. sulfincola and P. palmiformis have significantly higher arsenic concentrations (420–1417 and 125–321 µg g-1 respectively). R. piscesae contains appreciable quantities of inorganic arsenic (36±14%), monomethyl arsenic (2±2%), dimethyl arsenic (34±21%), an unknown methyl arsenical (7±16%), OSO3-arsenosugar (5±9%), TETRA (4±5%), ThioPO4/ThioDMAE (1±2%) and an unknown thio-arsenical (12±14%). These results suggests that host and symbionts are either involved in the methylation of arsenic, or are bathed in fluids enriched in methylated arsenic as a result of free-living microbial activity. The host carrying out methylation, however, cannot be ruled out. In contrast, 96–97% of the arsenic in P. sulfincola and P. palmiformis is inorganic arsenic, likely the result of arsenic precipitation within and upon the mucus they ingest while feeding. While all worms have oxo- and thio arsenosugars (2–30%), Paralvinella also have small amounts of arsenobetaine (
    Original languageEnglish
    Pages (from-to)41-48
    Number of pages8
    JournalDeep-Sea Research. Part I: Oceanographic Research Papers
    Volume116
    DOIs
    Publication statusPublished - 2016

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    hydrothermal vent
    arsenic
    arsenicals
    methylation
    chemical speciation
    fluid
    mucus
    organisms
    symbiont
    microbial activity
    symbionts
    Polychaeta
    deep sea
    shallow water

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    @article{ebefda37b70a4495afda942b388560e3,
    title = "Arsenic concentrations and species in three hydrothermal vent worms, Ridgeia piscesae, Paralvinella sulficola and Paralvinella palmiformis",
    abstract = "Hydrothermal vents are surficial expressions of subsurface geological and hydrological processes. Fluids emitting from active vents are chemically distinct from bottom seawater, and are enriched in dissolved metals and metalloids, including arsenic. Vent organisms accumulate arsenic but the arsenic speciation in these non-photosynthetic organisms is largely unknown. Here, arsenic concentrations and chemical species were measured in three deep sea hydrothermal vent worms (Ridgeia piscesae, Paralvinella sulfincola and Paralvinella palmiformis ) from the Juan de Fuca Ridge in the Northwest pacific. R. piscesae has similar arsenic concentrations (3.8–35 µg g-1) to shallow water polychaetes while P. sulfincola and P. palmiformis have significantly higher arsenic concentrations (420–1417 and 125–321 µg g-1 respectively). R. piscesae contains appreciable quantities of inorganic arsenic (36±14{\%}), monomethyl arsenic (2±2{\%}), dimethyl arsenic (34±21{\%}), an unknown methyl arsenical (7±16{\%}), OSO3-arsenosugar (5±9{\%}), TETRA (4±5{\%}), ThioPO4/ThioDMAE (1±2{\%}) and an unknown thio-arsenical (12±14{\%}). These results suggests that host and symbionts are either involved in the methylation of arsenic, or are bathed in fluids enriched in methylated arsenic as a result of free-living microbial activity. The host carrying out methylation, however, cannot be ruled out. In contrast, 96–97{\%} of the arsenic in P. sulfincola and P. palmiformis is inorganic arsenic, likely the result of arsenic precipitation within and upon the mucus they ingest while feeding. While all worms have oxo- and thio arsenosugars (2–30{\%}), Paralvinella also have small amounts of arsenobetaine (",
    author = "Bill MAHER and Elliott Duncan and Geoffrey Dilly and Simon FOSTER and E. Lombi and Kirk Scheckel and Peter Girguis",
    year = "2016",
    doi = "10.1016/j.dsr.2016.07.009",
    language = "English",
    volume = "116",
    pages = "41--48",
    journal = "Deep-Sea Research Part I: Oceanographic Research Papers",
    issn = "0967-0637",
    publisher = "Elsevier Limited",

    }

    Arsenic concentrations and species in three hydrothermal vent worms, Ridgeia piscesae, Paralvinella sulficola and Paralvinella palmiformis. / MAHER, Bill; Duncan, Elliott; Dilly, Geoffrey; FOSTER, Simon; Lombi, E.; Scheckel, Kirk; Girguis, Peter.

    In: Deep-Sea Research. Part I: Oceanographic Research Papers, Vol. 116, 2016, p. 41-48.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - Arsenic concentrations and species in three hydrothermal vent worms, Ridgeia piscesae, Paralvinella sulficola and Paralvinella palmiformis

    AU - MAHER, Bill

    AU - Duncan, Elliott

    AU - Dilly, Geoffrey

    AU - FOSTER, Simon

    AU - Lombi, E.

    AU - Scheckel, Kirk

    AU - Girguis, Peter

    PY - 2016

    Y1 - 2016

    N2 - Hydrothermal vents are surficial expressions of subsurface geological and hydrological processes. Fluids emitting from active vents are chemically distinct from bottom seawater, and are enriched in dissolved metals and metalloids, including arsenic. Vent organisms accumulate arsenic but the arsenic speciation in these non-photosynthetic organisms is largely unknown. Here, arsenic concentrations and chemical species were measured in three deep sea hydrothermal vent worms (Ridgeia piscesae, Paralvinella sulfincola and Paralvinella palmiformis ) from the Juan de Fuca Ridge in the Northwest pacific. R. piscesae has similar arsenic concentrations (3.8–35 µg g-1) to shallow water polychaetes while P. sulfincola and P. palmiformis have significantly higher arsenic concentrations (420–1417 and 125–321 µg g-1 respectively). R. piscesae contains appreciable quantities of inorganic arsenic (36±14%), monomethyl arsenic (2±2%), dimethyl arsenic (34±21%), an unknown methyl arsenical (7±16%), OSO3-arsenosugar (5±9%), TETRA (4±5%), ThioPO4/ThioDMAE (1±2%) and an unknown thio-arsenical (12±14%). These results suggests that host and symbionts are either involved in the methylation of arsenic, or are bathed in fluids enriched in methylated arsenic as a result of free-living microbial activity. The host carrying out methylation, however, cannot be ruled out. In contrast, 96–97% of the arsenic in P. sulfincola and P. palmiformis is inorganic arsenic, likely the result of arsenic precipitation within and upon the mucus they ingest while feeding. While all worms have oxo- and thio arsenosugars (2–30%), Paralvinella also have small amounts of arsenobetaine (

    AB - Hydrothermal vents are surficial expressions of subsurface geological and hydrological processes. Fluids emitting from active vents are chemically distinct from bottom seawater, and are enriched in dissolved metals and metalloids, including arsenic. Vent organisms accumulate arsenic but the arsenic speciation in these non-photosynthetic organisms is largely unknown. Here, arsenic concentrations and chemical species were measured in three deep sea hydrothermal vent worms (Ridgeia piscesae, Paralvinella sulfincola and Paralvinella palmiformis ) from the Juan de Fuca Ridge in the Northwest pacific. R. piscesae has similar arsenic concentrations (3.8–35 µg g-1) to shallow water polychaetes while P. sulfincola and P. palmiformis have significantly higher arsenic concentrations (420–1417 and 125–321 µg g-1 respectively). R. piscesae contains appreciable quantities of inorganic arsenic (36±14%), monomethyl arsenic (2±2%), dimethyl arsenic (34±21%), an unknown methyl arsenical (7±16%), OSO3-arsenosugar (5±9%), TETRA (4±5%), ThioPO4/ThioDMAE (1±2%) and an unknown thio-arsenical (12±14%). These results suggests that host and symbionts are either involved in the methylation of arsenic, or are bathed in fluids enriched in methylated arsenic as a result of free-living microbial activity. The host carrying out methylation, however, cannot be ruled out. In contrast, 96–97% of the arsenic in P. sulfincola and P. palmiformis is inorganic arsenic, likely the result of arsenic precipitation within and upon the mucus they ingest while feeding. While all worms have oxo- and thio arsenosugars (2–30%), Paralvinella also have small amounts of arsenobetaine (

    U2 - 10.1016/j.dsr.2016.07.009

    DO - 10.1016/j.dsr.2016.07.009

    M3 - Article

    VL - 116

    SP - 41

    EP - 48

    JO - Deep-Sea Research Part I: Oceanographic Research Papers

    JF - Deep-Sea Research Part I: Oceanographic Research Papers

    SN - 0967-0637

    ER -