Title
Identification of threshold body burdens of metals for the protection of the aquatic ecological status using two benthic invertebrates Identification of threshold body burdens of metals for the protection of the aquatic ecological status using two benthic invertebrates
Author
Faculty/Department
Faculty of Sciences. Biology
Publication type
article
Publication
London ,
Subject
Chemistry
Biology
Source (journal)
Environmental pollution. - London
Volume/pages
210(2016) , p. 76-84
ISSN
0269-7491
ISI
000376703600010
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
In this study accumulated concentrations of As, Cd, Cr, Cu, Ni, Pb and Zn in two benthic invertebrate taxa, Chironomus sp. and Tubificidae are related to ecological responses expressed as changes in macro invertebrate communities. In addition critical body burdens were estimated above which ecological quality was always lower than a certain threshold. Data from existing studies on bioaccumulation of the metals in both taxa were combined with different biological water quality indices. For all metal-endpoint combinations threshold values could be calculated above which ecological quality was always low. Safe threshold body burdens could be estimated for both species for all metals although the data set was more extended for Chrionomus sp. with estimated threshold values being 65, 3.2, 10, 57, 6.5, 73 and 490 μg/g dw for As, Cd, Cr, Cu, Ni, Pb and Zn. This study demonstrated that metal accumulation in resistant species such as chironomids and tubificid worms have the potential to be used as predictors of ecological effects in aquatic ecosystems. However, the estimated threshold values have to be validated and supported by more lines of evidence before they can be used by regulators.
E-info
https://repository.uantwerpen.be/docman/iruaauth/c1f5e0/132029.pdf
Full text (open access)
https://repository.uantwerpen.be/docman/irua/1e1c8c/132029.pdf
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