Comparing the impacts of sediment-bound bifenthrin on aquatic macroinvertebrates in laboratory bioassays and field microcosms

Boyle, R, Hoak, M, Pettigrove, V, Hoffmann, A and Long, S 2016, 'Comparing the impacts of sediment-bound bifenthrin on aquatic macroinvertebrates in laboratory bioassays and field microcosms', Ecotoxicology and Environmental Safety, vol. 133, pp. 489-500.


Document type: Journal Article
Collection: Journal Articles

Title Comparing the impacts of sediment-bound bifenthrin on aquatic macroinvertebrates in laboratory bioassays and field microcosms
Author(s) Boyle, R
Hoak, M
Pettigrove, V
Hoffmann, A
Long, S
Year 2016
Journal name Ecotoxicology and Environmental Safety
Volume number 133
Start page 489
End page 500
Total pages 12
Publisher Academic Press
Abstract We conducted two laboratory bioassays and two field microcosm exposures with bifenthrin (a synthetic pyrethroid) in order to evaluate the capacity of single-species laboratory bioassays to predict lethal and sublethal impacts on aquatic invertebrates in microcosms. For the laboratory species, Chironomus tepperi, larval survival was reduced by 24% at 53.66 µg/g OC, while adult emergence was reduced at concentrations of 33.33 µg/g OC and higher, with a 61% decrease at 77.78 µg/g OC and no emergence at 126.67 µg/g OC. The abundance of several other microcosm taxa was reduced in the microcosms at a similar concentration range (33.33 µg/g OC and above), however there was no impact on the abundance of the congeneric species, Chironomus oppositus. The differences in impacts between test systems were potentially due to both differing species sensitivity and the interaction of ambient temperature with bifenthrin toxicity. Bifenthrin also was associated with early emergence of Chironomus sp. in both test systems, at concentrations of 10 µg/g OC and higher (laboratory) and 43.90 µg/g OC (microcosm), and with a significant decrease in the proportion of C. oppositus males in a microcosm. These findings indicate that while laboratory bioassays accurately predict many impacts in the field, there are some limitations to the predictive capacity of these tests.
Subject Freshwater Ecology
Keyword(s) Synthetic pyrethroid
Chironomidae
Toxicity
Pesticide
Emergence
Chaoboridae
DOI - identifier 10.1016/j.ecoenv.2016.07.025
Copyright notice © 2016 Elsevier Inc
ISSN 0147-6513
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