Effects of the fungicide metiram in outdoor freshwater microcosms: responses of invertebrates, primary producers and microbes.

Ecotoxicology
Ronghua LinTheo C M Brock

Abstract

The ecological impact of the dithiocarbamate fungicide metiram was studied in outdoor freshwater microcosms, consisting of 14 enclosures placed in an experimental ditch. The microcosms were treated three times (interval 7 days) with the formulated product BAS 222 28F (Polyram®). Intended metiram concentrations in the overlying water were 0, 4, 12, 36, 108 and 324 μg a.i./L. Responses of zooplankton, macroinvertebrates, phytoplankton, macrophytes, microbes and community metabolism endpoints were investigated. Dissipation half-life (DT₅₀) of metiram was approximately 1-6 h in the water column of the microcosm test system and the metabolites formed were not persistent. Multivariate analysis indicated treatment-related effects on the zooplankton (NOEC(community) = 36 μg a.i./L). Consistent treatment-related effects on the phytoplankton and macroinvertebrate communities and on the sediment microbial community could not be demonstrated or were minor. There was no evidence that metiram affected the biomass, abundance or functioning of aquatic hyphomycetes on decomposing alder leaves. The most sensitive populations in the microcosms comprised representatives of Rotifera with a NOEC of 12 μg a.i./L on isolated sampling days and a NOEC o...Continue Reading

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Citations

May 10, 2015·Ecotoxicology·Zhao-Yu JiangJiao Fei
Apr 24, 2013·Integrated Environmental Assessment and Management·Theo C M Brock
Jun 11, 2014·The Science of the Total Environment·Mauricio R DimitrovLorraine Maltby
Jun 26, 2018·Ecological Applications : a Publication of the Ecological Society of America·Marie SimoninEmily S Bernhardt
Oct 20, 2020·Bioorganic Chemistry·Sangita Dattatray ShindeNagula Shankaraiah
Mar 6, 2019·Environmental Science & Technology·Jochen P ZubrodRalf B Schäfer
Aug 27, 2021·Toxics·Francisco Sánchez-Bayo

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Methods Mentioned

BETA
electrophoresis
PCR

Software Mentioned

Bionumerics
Community Analysis

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