Ecological factors affecting the accumulation and speciation of arsenic in twelve Australian coastal bivalve molluscs

William Maher, Joel Waring, Frank Krikowa, Elliott Duncan, Simon Foster

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Environmental context Knowledge of the pathways by which arsenic is accumulated and transferred in marine ecosystems is scarce. Molluscs are important keystone organisms providing a link between primary producers (micro and macroalgae) and higher trophic levels such as fish. The present study examines the accumulation and species of arsenic in common bivalve molluscs from south-east Australia to understand the cycling of arsenic in marine food webs. Abstract The present paper reports the whole-tissue total arsenic concentrations and water-soluble arsenic species in 12 common coastal Australian bivalve mollusc species. Mean arsenic concentrations ranged from 18 to 57 g g -1 dry mass. Planktivores had significantly less arsenic (20-40 g g -1; 22 ± 3 g g -1) than did suspension and deposit feeders (36-57 g g -1; 43 ± 7 g g -1), with those associated with fine clay-silt sediments (49 ± 7 g g -1) having significantly more arsenic than those associated with sand substrates (31 ± 11 g g -1). Most planktivores and suspension feeders had similar arsenic species, with high proportions of arsenobetaine (AB) (64-92 %) and relatively low proportions of other arsenic species (0.55-15.8 %). Lower proportions of AB (13-57 %) and larger proportions of inorganic arsenic (6-7 %) were found in deposit feeders, reflecting increased exposure to inorganic arsenic in sediments. The study indicated that at lower trophic levels, organisms feed on algae and suspended matter containing a range of arsenic species including arsenosugars and AB. The implications for arsenic cycling are that as all bivalve molluscs accumulate AB and are a source of AB in benthic food webs. Because all bivalve molluscs also contained appreciable concentrations of arsenoriboses, precursors are present for the de novo synthesis of AB. As well, deposit feeders have higher proportions of inorganic arsenic that can be metabolised to different end products when ingested by higher trophic organisms.

Original languageEnglish
Pages (from-to)46-57
Number of pages12
JournalEnvironmental Chemistry
Volume15
Issue number1-2
DOIs
Publication statusPublished - 9 May 2018

Fingerprint

Molluscs
Arsenic
mollusc
bivalve
arsenic
deposit feeder
planktivore
Deposits
ecological factor
trophic level
food web
Suspensions
Sediments
Aquatic ecosystems
Silt

Cite this

@article{8367ae8a9842422b9b2cf54a284a3e4f,
title = "Ecological factors affecting the accumulation and speciation of arsenic in twelve Australian coastal bivalve molluscs",
abstract = "Environmental context Knowledge of the pathways by which arsenic is accumulated and transferred in marine ecosystems is scarce. Molluscs are important keystone organisms providing a link between primary producers (micro and macroalgae) and higher trophic levels such as fish. The present study examines the accumulation and species of arsenic in common bivalve molluscs from south-east Australia to understand the cycling of arsenic in marine food webs. Abstract The present paper reports the whole-tissue total arsenic concentrations and water-soluble arsenic species in 12 common coastal Australian bivalve mollusc species. Mean arsenic concentrations ranged from 18 to 57 g g -1 dry mass. Planktivores had significantly less arsenic (20-40 g g -1; 22 ± 3 g g -1) than did suspension and deposit feeders (36-57 g g -1; 43 ± 7 g g -1), with those associated with fine clay-silt sediments (49 ± 7 g g -1) having significantly more arsenic than those associated with sand substrates (31 ± 11 g g -1). Most planktivores and suspension feeders had similar arsenic species, with high proportions of arsenobetaine (AB) (64-92 {\%}) and relatively low proportions of other arsenic species (0.55-15.8 {\%}). Lower proportions of AB (13-57 {\%}) and larger proportions of inorganic arsenic (6-7 {\%}) were found in deposit feeders, reflecting increased exposure to inorganic arsenic in sediments. The study indicated that at lower trophic levels, organisms feed on algae and suspended matter containing a range of arsenic species including arsenosugars and AB. The implications for arsenic cycling are that as all bivalve molluscs accumulate AB and are a source of AB in benthic food webs. Because all bivalve molluscs also contained appreciable concentrations of arsenoriboses, precursors are present for the de novo synthesis of AB. As well, deposit feeders have higher proportions of inorganic arsenic that can be metabolised to different end products when ingested by higher trophic organisms.",
author = "William Maher and Joel Waring and Frank Krikowa and Elliott Duncan and Simon Foster",
year = "2018",
month = "5",
day = "9",
doi = "10.1071/EN17106",
language = "English",
volume = "15",
pages = "46--57",
journal = "Environmental Chemistry",
issn = "1448-2517",
publisher = "CSIRO",
number = "1-2",

}

Ecological factors affecting the accumulation and speciation of arsenic in twelve Australian coastal bivalve molluscs. / Maher, William; Waring, Joel; Krikowa, Frank; Duncan, Elliott; Foster, Simon.

In: Environmental Chemistry, Vol. 15, No. 1-2, 09.05.2018, p. 46-57.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Ecological factors affecting the accumulation and speciation of arsenic in twelve Australian coastal bivalve molluscs

AU - Maher, William

AU - Waring, Joel

AU - Krikowa, Frank

AU - Duncan, Elliott

AU - Foster, Simon

PY - 2018/5/9

Y1 - 2018/5/9

N2 - Environmental context Knowledge of the pathways by which arsenic is accumulated and transferred in marine ecosystems is scarce. Molluscs are important keystone organisms providing a link between primary producers (micro and macroalgae) and higher trophic levels such as fish. The present study examines the accumulation and species of arsenic in common bivalve molluscs from south-east Australia to understand the cycling of arsenic in marine food webs. Abstract The present paper reports the whole-tissue total arsenic concentrations and water-soluble arsenic species in 12 common coastal Australian bivalve mollusc species. Mean arsenic concentrations ranged from 18 to 57 g g -1 dry mass. Planktivores had significantly less arsenic (20-40 g g -1; 22 ± 3 g g -1) than did suspension and deposit feeders (36-57 g g -1; 43 ± 7 g g -1), with those associated with fine clay-silt sediments (49 ± 7 g g -1) having significantly more arsenic than those associated with sand substrates (31 ± 11 g g -1). Most planktivores and suspension feeders had similar arsenic species, with high proportions of arsenobetaine (AB) (64-92 %) and relatively low proportions of other arsenic species (0.55-15.8 %). Lower proportions of AB (13-57 %) and larger proportions of inorganic arsenic (6-7 %) were found in deposit feeders, reflecting increased exposure to inorganic arsenic in sediments. The study indicated that at lower trophic levels, organisms feed on algae and suspended matter containing a range of arsenic species including arsenosugars and AB. The implications for arsenic cycling are that as all bivalve molluscs accumulate AB and are a source of AB in benthic food webs. Because all bivalve molluscs also contained appreciable concentrations of arsenoriboses, precursors are present for the de novo synthesis of AB. As well, deposit feeders have higher proportions of inorganic arsenic that can be metabolised to different end products when ingested by higher trophic organisms.

AB - Environmental context Knowledge of the pathways by which arsenic is accumulated and transferred in marine ecosystems is scarce. Molluscs are important keystone organisms providing a link between primary producers (micro and macroalgae) and higher trophic levels such as fish. The present study examines the accumulation and species of arsenic in common bivalve molluscs from south-east Australia to understand the cycling of arsenic in marine food webs. Abstract The present paper reports the whole-tissue total arsenic concentrations and water-soluble arsenic species in 12 common coastal Australian bivalve mollusc species. Mean arsenic concentrations ranged from 18 to 57 g g -1 dry mass. Planktivores had significantly less arsenic (20-40 g g -1; 22 ± 3 g g -1) than did suspension and deposit feeders (36-57 g g -1; 43 ± 7 g g -1), with those associated with fine clay-silt sediments (49 ± 7 g g -1) having significantly more arsenic than those associated with sand substrates (31 ± 11 g g -1). Most planktivores and suspension feeders had similar arsenic species, with high proportions of arsenobetaine (AB) (64-92 %) and relatively low proportions of other arsenic species (0.55-15.8 %). Lower proportions of AB (13-57 %) and larger proportions of inorganic arsenic (6-7 %) were found in deposit feeders, reflecting increased exposure to inorganic arsenic in sediments. The study indicated that at lower trophic levels, organisms feed on algae and suspended matter containing a range of arsenic species including arsenosugars and AB. The implications for arsenic cycling are that as all bivalve molluscs accumulate AB and are a source of AB in benthic food webs. Because all bivalve molluscs also contained appreciable concentrations of arsenoriboses, precursors are present for the de novo synthesis of AB. As well, deposit feeders have higher proportions of inorganic arsenic that can be metabolised to different end products when ingested by higher trophic organisms.

UR - http://www.scopus.com/inward/record.url?scp=85047771768&partnerID=8YFLogxK

UR - http://www.mendeley.com/research/ecological-factors-affecting-accumulation-speciation-arsenic-twelve-australian-coastal-bivalve-mollu-1

U2 - 10.1071/EN17106

DO - 10.1071/EN17106

M3 - Article

VL - 15

SP - 46

EP - 57

JO - Environmental Chemistry

JF - Environmental Chemistry

SN - 1448-2517

IS - 1-2

ER -