Article (Scientific journals)
Trace element contamination biomonitoring: a comparative study between the polychaetes Alitta virens and Hediste diversicolor.
Watson, G J; White, S; Gobert, Sylvie et al.
2024In Environmental Pollution, 363, p. 125116
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Keywords :
bioaccumulation; decarbonise; metal Nereidae; ragworms; stable isotope; sulphur isotopes
Abstract :
[en] Trace elements (TEs) remain of significant toxicological concern as many are critical for global decarbonisation. TEs accumulate in sediments so benthic polychaetes (e.g. Hediste diversicolor and Alitta virens) are highly relevant for ecotoxicology. However, ecological/biological differences could influence TE accumulation and biomonitoring suitability. Exploiting multiple sympatric populations (Solent, UK), we measure sediment and tissue concentrations generating EFs (enrichment factors), AEIs (Adverse Effects Indexes) and tissue bioaccumulation factors. We also assess stable isotope compositions to elucidate diet influences. Despite diverse anthropogenic activity in the Solent, the majority of TEs present low levels of sediment contamination at the sites. For Ni, Pb and As, a combination of mean AEIs >1 and some sediment concentrations exceeding SQVs (Sediment Quality Values) indicate a slight toxicological risk. For Cu and Hg, high EFs and AEI scores confirm they are the greatest risk, thus requiring source identification/control. However, only mean As tissue concentrations reflect contaminated sites, therefore, identifying the As-source(s) is also a priority. Sediment and tissue concentration relationships were generally negative and not significant for both species. Although a significant negative relationship for Cd for A. virens requires further investigation, the lack of evidence for TE bioaccumulation from sediment may limit both species' biomonitoring suitability for low-contamination sites. Species differences in tissue concentration were also TE specific: H. diversicolor had significantly higher concentrations for Ag, Cu, Hg, Ni and Zn, whilst the reverse was true for Cd, Fe, Cr and As. Whilst ecological differences and that feeding sources are site and species-specific (as evidenced by C, N and S stable isotopes analysis) cannot be ignored, the diverse tissue concentrations strongly suggest different TE regulation strategies per species. Together these data will be important for ecotoxicologists and regulators to select the 'best' polychaete biomonitor and assess TE toxicity under future global decarbonisation trajectories for TE inputs.
Research Center/Unit :
FOCUS - Freshwater and OCeanic science Unit of reSearch - ULiège
Disciplines :
Aquatic sciences & oceanology
Environmental sciences & ecology
Zoology
Author, co-author :
Watson, G J ;  Institute of Marine Sciences, School of Environment and Life Sciences, University of Portsmouth, Ferry Road, Portsmouth, PO4 9LY, UK. Electronic address: gordon.watson@port.ac.uk
White, S;  Centre for Fisheries and Aquaculture Science, Pakefield Road, Lowestoft, NR33 0HT, UK
Gobert, Sylvie  ;  Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Océanographie biologique
Lepoint, Gilles  ;  Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution
Sturaro, Nicolas  ;  Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Laboratoire d'Ecologie trophique et isotopique
Richir, Jonathan  ;  Université de Liège - ULiège > Département d'astrophysique, géophysique et océanographie (AGO) > Chemical Oceanography Unit (COU) ; SciSca SRL, 5330 Maillen, Belgium
Language :
English
Title :
Trace element contamination biomonitoring: a comparative study between the polychaetes Alitta virens and Hediste diversicolor.
Publication date :
12 October 2024
Journal title :
Environmental Pollution
ISSN :
0269-7491
eISSN :
1873-6424
Publisher :
Elsevier BV, England
Volume :
363
Pages :
125116
Peer reviewed :
Peer Reviewed verified by ORBi
Development Goals :
14. Life below water
Funders :
ERDF - European Regional Development Fund
Available on ORBi :
since 21 November 2024

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