The effects of a pesticide mixture on aquatic ecosystems differing in trophic status: responses of the macrophyte Myriophyllum spicatum and the periphytic algal community
| Autor: | Per Woin, Lina Wendt-Rasch, Sjh Crum, P.J. van den Brink |
|---|---|
| Rok vydání: | 2004 |
| Předmět: |
pyrethroid insecticides
aquatic plants pesticide residues Health Toxicology and Mutagenesis Population Dynamics herbicidenmengsels Sub-department of Soil Quality aquatic weeds pesticidenresiduen waterplanten lambda-cyhalothrin Alterra - Centre for Water and Climate Drug Interactions Wageningen Environmental Research Periphyton nontarget effects trophic levels primary producers biology Myriophyllum Aquatic ecosystem Eukaryota General Medicine insecticide dursban(r) 4e Pollution Macrophyte final conclusions phosphorus release aquatic environment nontarget organisms Microcosm onbedoelde effecten Alterra - Centrum Water en Klimaat aquatisch milieu zooplankton Food Chain metamitron onkruiden fresh-water microcosms Magnoliopsida Aquatic plant asulam Botany fungicide carbendazim weeds trofische graden Pesticides Ecosystem phytoplankton succession schadelijke waterplanten Lemna Public Health Environmental and Occupational Health herbicide mixtures Elodea biology.organism_classification Sectie Bodemkwaliteit model-ecosystems Water Pollutants Chemical niet-doelorganismen |
| Zdroj: | Ecotoxicology and Environmental Safety 57 (2004) 3 Ecotoxicology and Environmental Safety, 57(3), 383-398 |
| ISSN: | 0147-6513 |
| DOI: | 10.1016/j.ecoenv.2003.09.010 |
| Popis: | The effects of a pesticide mixture (asulam, fluazinam, lambda-cyhalothrin, and metamitron) on aquatic ecosystems were investigated in 20 outdoor aquatic microcosms. Ten of the microcosms simulated mesotrophic aquatic ecosystems dominated by submerged macrophytes (Elodea). The others simulated eutrophic ecosystems with a high Lemna surface coverage (Lemna). This paper describes the fate of the chemicals as well as their effects on the growth of Myriophyllum spicatum and the periphytic algal community. In the Elodea-dominated microcosms significant increase in the biomass and alterations of species composition of the periphytic algae were observed, but no effect on M. spicatum growth could be recorded in response to the treatment. The opposite was found in the Lemna-dominated microcosms, in which decreased growth of M. spicatum was observed but no alterations could be found in the periphytic community. In the Elodea-dominated microcosms the species composition of the periphytic algae diverged from that of the control following treatment with 0.5% spray drift emission of the label-recommended rate (5% for lambda-cyhalothrin), while reduced growth of M. spicatum in the Lemna-dominated microcosms was recorded at 2% drift (20% for lambda-cyhalothrin). This study shows that the structure of the ecosystem influences the final effect of pesticide exposure. |
| Databáze: | OpenAIRE |
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