Distribution of arsenic species in an open seagrass ecosystem: relationship to trophic groups, habitats and feeding zones

Amina Price, William Maher, Jason King KIRBY, Elliott DUNCAN, Anne Taylor, Jaimie Potts

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    19 Citations (Scopus)

    Abstract

    The distribution and speciation of arsenic within an open marine seagrass ecosystem in Lake Macquarie, NSW, Australia is described. Twenty-six estuarine species were collected from five trophic groups (autotrophs, suspension-feeders, herbivores, detritivores and omnivores, and carnivores). Sediment, detritus, epibiota and microinvertebrates were also collected and were classified as arsenic source samples. There were no significant differences in arsenic concentrations between trophic groups and between pelagic and benthic feeders. Benthic-dwelling species generally contained higher arsenic concentrations than pelagic-dwelling species. Sediments, seagrass blades and detritus contained mostly inorganic arsenic (50-90 %) and arsenoribosides (10-26 %), with some methylarsonate (9.4-14.6 %) and dimethyarsinate (7.9-9.7 %) in seagrass blades and detritus. Macroalgae contained mostly arsenoribosides (40-100 %). Epibiota and other animals contained predominately arsenobetaine (63-100 %) and varying amounts of dimethyarsinate (0-26 %), monomethyarsonate (0-14.6 %), inorganic arsenic (0-2 %), trimethylarsenic oxide (0-6.6 %), arsenocholine (0-12 %) and tetramethylarsonium ion (0-4.5 %). It was concluded that arsenic concentrations and species within the organisms of the Lake Macquarie ecosystem are species-specific and determined by a variety of factors including exposure, diet and the physiology of the organisms.
    Original languageEnglish
    Pages (from-to)77-88
    Number of pages12
    JournalEnvironmental Chemistry
    Volume9
    Issue number1
    DOIs
    Publication statusPublished - 2012

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    Arsenic
    seagrass
    Ecosystems
    arsenic
    ecosystem
    habitat
    detritus
    Lakes
    Sediments
    Aquatic ecosystems
    lake ecosystem
    Physiology
    Nutrition
    carnivore
    distribution
    Oxides
    sediment
    physiology
    herbivore
    Suspensions

    Cite this

    Price, Amina ; Maher, William ; KIRBY, Jason King ; DUNCAN, Elliott ; Taylor, Anne ; Potts, Jaimie. / Distribution of arsenic species in an open seagrass ecosystem: relationship to trophic groups, habitats and feeding zones. In: Environmental Chemistry. 2012 ; Vol. 9, No. 1. pp. 77-88.
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    abstract = "The distribution and speciation of arsenic within an open marine seagrass ecosystem in Lake Macquarie, NSW, Australia is described. Twenty-six estuarine species were collected from five trophic groups (autotrophs, suspension-feeders, herbivores, detritivores and omnivores, and carnivores). Sediment, detritus, epibiota and microinvertebrates were also collected and were classified as arsenic source samples. There were no significant differences in arsenic concentrations between trophic groups and between pelagic and benthic feeders. Benthic-dwelling species generally contained higher arsenic concentrations than pelagic-dwelling species. Sediments, seagrass blades and detritus contained mostly inorganic arsenic (50-90 {\%}) and arsenoribosides (10-26 {\%}), with some methylarsonate (9.4-14.6 {\%}) and dimethyarsinate (7.9-9.7 {\%}) in seagrass blades and detritus. Macroalgae contained mostly arsenoribosides (40-100 {\%}). Epibiota and other animals contained predominately arsenobetaine (63-100 {\%}) and varying amounts of dimethyarsinate (0-26 {\%}), monomethyarsonate (0-14.6 {\%}), inorganic arsenic (0-2 {\%}), trimethylarsenic oxide (0-6.6 {\%}), arsenocholine (0-12 {\%}) and tetramethylarsonium ion (0-4.5 {\%}). It was concluded that arsenic concentrations and species within the organisms of the Lake Macquarie ecosystem are species-specific and determined by a variety of factors including exposure, diet and the physiology of the organisms.",
    author = "Amina Price and William Maher and KIRBY, {Jason King} and Elliott DUNCAN and Anne Taylor and Jaimie Potts",
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    Distribution of arsenic species in an open seagrass ecosystem: relationship to trophic groups, habitats and feeding zones. / Price, Amina; Maher, William; KIRBY, Jason King; DUNCAN, Elliott; Taylor, Anne; Potts, Jaimie.

    In: Environmental Chemistry, Vol. 9, No. 1, 2012, p. 77-88.

    Research output: Contribution to journalArticle

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    AU - Price, Amina

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    AU - Taylor, Anne

    AU - Potts, Jaimie

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    N2 - The distribution and speciation of arsenic within an open marine seagrass ecosystem in Lake Macquarie, NSW, Australia is described. Twenty-six estuarine species were collected from five trophic groups (autotrophs, suspension-feeders, herbivores, detritivores and omnivores, and carnivores). Sediment, detritus, epibiota and microinvertebrates were also collected and were classified as arsenic source samples. There were no significant differences in arsenic concentrations between trophic groups and between pelagic and benthic feeders. Benthic-dwelling species generally contained higher arsenic concentrations than pelagic-dwelling species. Sediments, seagrass blades and detritus contained mostly inorganic arsenic (50-90 %) and arsenoribosides (10-26 %), with some methylarsonate (9.4-14.6 %) and dimethyarsinate (7.9-9.7 %) in seagrass blades and detritus. Macroalgae contained mostly arsenoribosides (40-100 %). Epibiota and other animals contained predominately arsenobetaine (63-100 %) and varying amounts of dimethyarsinate (0-26 %), monomethyarsonate (0-14.6 %), inorganic arsenic (0-2 %), trimethylarsenic oxide (0-6.6 %), arsenocholine (0-12 %) and tetramethylarsonium ion (0-4.5 %). It was concluded that arsenic concentrations and species within the organisms of the Lake Macquarie ecosystem are species-specific and determined by a variety of factors including exposure, diet and the physiology of the organisms.

    AB - The distribution and speciation of arsenic within an open marine seagrass ecosystem in Lake Macquarie, NSW, Australia is described. Twenty-six estuarine species were collected from five trophic groups (autotrophs, suspension-feeders, herbivores, detritivores and omnivores, and carnivores). Sediment, detritus, epibiota and microinvertebrates were also collected and were classified as arsenic source samples. There were no significant differences in arsenic concentrations between trophic groups and between pelagic and benthic feeders. Benthic-dwelling species generally contained higher arsenic concentrations than pelagic-dwelling species. Sediments, seagrass blades and detritus contained mostly inorganic arsenic (50-90 %) and arsenoribosides (10-26 %), with some methylarsonate (9.4-14.6 %) and dimethyarsinate (7.9-9.7 %) in seagrass blades and detritus. Macroalgae contained mostly arsenoribosides (40-100 %). Epibiota and other animals contained predominately arsenobetaine (63-100 %) and varying amounts of dimethyarsinate (0-26 %), monomethyarsonate (0-14.6 %), inorganic arsenic (0-2 %), trimethylarsenic oxide (0-6.6 %), arsenocholine (0-12 %) and tetramethylarsonium ion (0-4.5 %). It was concluded that arsenic concentrations and species within the organisms of the Lake Macquarie ecosystem are species-specific and determined by a variety of factors including exposure, diet and the physiology of the organisms.

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