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Estimating safe concentrations of trace metals from inter-continental field data on river macroinvertebrates

Iwasaki, Yuichi and Ormerod, Stephen James 2012. Estimating safe concentrations of trace metals from inter-continental field data on river macroinvertebrates. Environmental Pollution 166 , pp. 182-186. 10.1016/j.envpol.2012.03.028

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We derived safe concentrations (SCs) of copper, zinc, cadmium, and manganese using river macroinvertebrate surveys at over 400 individual sites on three continents represented by the UK, USA, and Japan. We related a standardized measure of EPT (Ephemeroptera, Plecoptera, and Trichoptera) taxon richness to dissolved metal concentrations and identified SCs as the thresholds at which effects became apparent. Estimated SCs (and 95% confidence interval, μg/L) for copper, zinc, cadmium, and manganese were 6.6 (1.2–14.2), 34 (11–307), 0.11 (0.06–0.49), and 7.1 (1.4–20.5), respectively. These values for copper, zinc, and cadmium overlapped closely with laboratory-derived SCs available from water quality criteria/standards in the USA/UK and also predicted no effect concentrations from European Union risk assessments. Such laboratory-derived SCs for manganese are unavailable. These results not only add considerable confidence to the application of existing metal standards, but illustrate also how standard values might be widely transportable geographically.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Biosciences
Subjects: G Geography. Anthropology. Recreation > GF Human ecology. Anthropogeography
Q Science > QR Microbiology
Uncontrolled Keywords: Ecological risk assessment; Ecotoxicology; Water pollution; Ecological threshold; Benthic macroinvertebrates; Species sensitivity distribution
Publisher: Elsevier
ISSN: 0269-7491
Last Modified: 04 Jun 2017 04:04

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