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The relevance of European Biota Quality Standards on the ecological water quality as determined by the multimetric macro-invertebrate index: A Flemish case study

European Biota Quality Standards (EQSbiota), for compounds with low water solubility and high biomagnification, were created to sustain water quality and protect top predators and humans from secondary poisoning. In reality, for multiple compounds, an exceedance of these standards is often reported in literature without a decrease in ecological water quality determined by biotic indices. In the present study, threshold concentrations were defined in biota (from 44 sampling locations throughout Flanders (Belgium)), above which a good ecological water quality, assessed by the Multimetric Macroinvertebrate Index Flanders (MMIF), was never reached. Threshold values were compared to current EQSbiota. Accumulated perfluoroctane sulfonate (PFOS), mercury (Hg), hexabromocyclododecane (HBCD), polybrominated diphenyl ethers (PBDEs), dioxins and polychlorinated biphenyls (PCBs) concentrations were measured in muscle tissue of European yellow eel (Anguilla anguilla) and perch (Perca fluviatilis). Fluoranthene and benzo(a)pyrene were also analyzed in translocated mussels (Dreissena bugensis, D. polymorpha and Corbicula fluminea). Threshold values could only be calculated using a 90th quantile regression model for PFOS (in perch; 12 µg/kg ww), PCBs (in eel; 328 µg/kg ww) and benzo(a)pyrene (in mussels: 4.35 µg/kg ww). The lack of a significant regression model for the other compounds indicated an effective threshold value higher than the concentrations measured in the present study. Alternatively, the 95th percentile of concentrations measured in locations with a good ecological quality (MMIF≥0.7), was calculated for all compounds as an additional threshold value. Finally, fish concentrations were standardized for 5% lipid content (or 26% dry weight content for PFOS and Hg). Threshold values for PFOS and benzo(a)pyrene and the 95th percentiles for dioxins and fluoranthene were comparable to the existing standards. For all other compounds, the 95th percentile was higher than the current EQSbiota, while for HBCD, it was lower. These results strongly advise revising and fine-tuning the current EQSbiota, especially for ∑PBDE and HBCD.

Details

Aantal pagina's 1
Volume 231
Pagina's (van-tot) 113222
Type A1: Web of Science-artikel
Categorie Onderzoek
Tijdschrift Ecotoxicology and Environmental Safety
Issns 0147-6513
Uitgeverij Elsevier
Taal Engels
Bibtex

@book{c59d8b81-8838-4c15-b245-2895477a52bf, title = "The relevance of European Biota Quality Standards on the ecological water quality as determined by the multimetric macro-invertebrate index: A Flemish case study", author = "Lies Teunen and Maarten De Jonge and Govindan Malarvannan and Adrian Covaci and Claude Belpaire and Jean-François Focant and Ronny Blust and Lieven Bervoets", year = "2022", doi = "https://doi.org/10.1016/j.ecoenv.2022.113222", language = "Engels", series = "Ecotoxicology and Environmental Safety", publisher = "Elsevier", number = "", address = "België", }

Auteurs

Lies Teunen
Maarten De Jonge
Govindan Malarvannan
Adrian Covaci
Claude Belpaire
Jean-François Focant
Ronny Blust
Lieven Bervoets