Title
Levels of persistent organic pollutants in larvae of the damselfly **Ischnura elegans** (Odonata, Coenagrionidae) from different ponds in Flanders, Belgium Levels of persistent organic pollutants in larvae of the damselfly **Ischnura elegans** (Odonata, Coenagrionidae) from different ponds in Flanders, Belgium
Author
Faculty/Department
Faculty of Sciences. Biology
Faculty of Pharmaceutical, Biomedical and Veterinary Sciences. Pharmacy
Publication type
article
Publication
Amsterdam ,
Subject
Chemistry
Biology
Source (journal)
The science of the total environment. - Amsterdam
Volume/pages
423(2012) , p. 162-167
ISSN
0048-9697
ISI
000303231200020
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
We investigated the accumulation of persistent organic pollutants in damselfly larvae (Ischnura elegans) in sixteen ponds in Flanders (Belgium), widely differing in the surrounding land use. Concentrations of polychlorinated biphenyls (PCBs), polybrominated diphenyl ethers (PBDEs), p,p'-dichlorodiphenyldichloroethylene (p,p'-DDE) and hexachlorobenzene (HCB) were measured. From all targeted PBDE-congeners, only three congeners (IUPAC nos. 47, 99, 100) were above the limit of quantification (LOQ). The ∑ PBDE concentrations ranged from < LOQ up to 0.51 ng g− 1 ww. From the targeted PCB-congeners, thirteen were detectable (IUPAC nos. 95, 99, 101, 105, 118, 138, 149, 153, 156, 170, 180, 183, and 187). A high variation in ∑ PCB concentrations was observed between the ponds, ranging from < LOQ (0.67 ng g− 1 ww) up to 9.91 ng g− 1 ww in the damselflies from the pond at Sijsele. In all investigated Flemish ponds, p,p'-DDE concentrations were > LOQ (0.20 ng g− 1 ww) with values up to 3.30 ng g− 1 ww in the pond at Hamme. In fifteen ponds, the HCB concentrations were > LOQ (0.05 ng g− 1 ww) with values up to 0.24 ng g− 1 ww. For the available data in the literature a comparison with different species was done for some of the sampled ponds. The monitored ponds can be separated in three groups based on their contamination. The first group is characterised by a relative low POP content (∑ PBDEs, ∑ PCBs, HCB). Group 2 contained more HCB and p,p'-DDE than the overall mean while this was the case for PBDEs and PCBs in group 3. The vectors of both contaminated groups are situated nearly perpendicular which is suggesting a different pollution sources.
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