Effects of the herbicide metazachlor on macrophytes and ecosystem function in freshwater pond and stream mesocosms

Mohr, Silvia; Berghahn, Rüdiger; Feibicke, Michael; Meinecke, Stefan; Ottenströer, T.; Schmiedling, Ina; Schmiediche, Ronny; Schmidt, R.

doi:10.1016/j.aquatox.2007.02.001

Cited by 60 publications

(33 citation statements)

References 26 publications

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“…All plants of M. verticillatum from one plant pot were harvested at each sampling date. A detailed description of the experimental set-up of the indoor mesocosms (experiment 5) is given in Mohr et al (2005Mohr et al ( , 2007.…”

Section: Myriophyllum Verticillatummentioning

confidence: 99%

Comparing growth development of Myriophyllum spp. in laboratory and field experiments for ecotoxicological testing

Knauer

Mohr

Feiler

2008

Environ Sci Pollut Res

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Section: Myriophyllum Verticillatummentioning

confidence: 99%

Comparing growth development of Myriophyllum spp. in laboratory and field experiments for ecotoxicological testing

Knauer

Mohr

Feiler

2008

Environ Sci Pollut Res

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“…Indirect effects of herbicides, such as reduced population growth or survival of herbivores, have been shown (Dewey 1986, Jüttner et al 1995, Rohr & Crumrine 2005, Mohr et al 2007). Indirect effects of terbutryn have been shown for the macrophytebased food web of slow flowing canals, where it indirectly changed the structure of the benthic invertebrate community by altering the macrophyte community .…”

Section: Introductionmentioning

confidence: 99%

Herbicide indirectly reduces physiological condition of a benthic grazer

Rybicki¹,

Winkelmann²,

Hellmann³

et al. 2012

Aquat. Biol.

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Freshwater ecosystems are polluted with various environmental chemicals. For example, pesticides enter the aquatic environment via spray drift or surface runoff from catchment areas used for industrialised agriculture. In the present study, we investigated the response of the grazer−aufwuchs interaction when exposed to the herbicide terbutryn in a microcosm experiment. Terbutryn induced a trophic cascade with negative effects on grazers by inhibiting growth of primary producers. We determined a no-observed-effect concentration (measured as particulate organic carbon, NOEC POC ) of 0.21 µg l −1 for aufwuchs biomass and a lowest-observed-effect concentration (LOEC POC ) of 2.01 µg l −1. Furthermore, a shift in the aufwuchs community was detected in all terbutryn treatments nearly 4 wk after exposure, and this shift persisted until the end of the experiment in the treatment with the highest terbutryn concentration. In addition, reduced energy stores (triglycerides, TG) of the grazer Rhithrogena semicolorata (Heptageniidae: Ephemeroptera) were found (NOEC TG = 0.03 µg l ), which was interpreted as an indication of moderate starvation during the experiment. While starvation did not result in reduced larval growth as might have been expected, the ob served reduction of TG content in larvae (24%) is consistent with results from a separate experiment in which starvation alone induced a 15% reduction of TG content as well as reduced emergence, reduced size at emergence, and reduced egg production.

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“…It is a relatively nonpersistent compound (DT 50 in soil from 3 to 9 days), but occurs in surface and ground water due to spray-drift or runoff in concentrations up to100 μg L −1 (Mohr et al 2007). …”

Section: Introductionmentioning

confidence: 99%

Influence of formulation on mobility of metazachlor in soil

Włodarczyk

2014

Environ Monit Assess

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The mobility of metazachlor [2-chloro-N-(pyrazol-1-ylmethyl)acet-2′,6′-xylidide] in sand soil and loamy sand soil was studied in a soil column under laboratory conditions. Commercial metazachlor formulation (Metazachlor 500 suspension concentrate (SC)) and metazachlor immobilized in alginate matrix were used for leaching experiment. The initial concentration of metazachlor in soil for both formulations was 2.0 mg mL−1. After application of herbicide, the columns were irrigated with 100, 40, and 3.7 mm of water. After 1 h, when addition of water was completed, soils were sampled in 5-cm segments and were used for the analysis of residues. The use of alginate controlled release (CR) formulation reduced the vertical mobility of metazachlor into soil layer in comparison with the formulation SC.

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Effects of the herbicide metazachlor on macrophytes and ecosystem function in freshwater pond and stream mesocosms

Cited by 60 publications

References 26 publications

Comparing growth development of Myriophyllum spp. in laboratory and field experiments for ecotoxicological testing

Comparing growth development of Myriophyllum spp. in laboratory and field experiments for ecotoxicological testing

Herbicide indirectly reduces physiological condition of a benthic grazer

Influence of formulation on mobility of metazachlor in soil

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