Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 343136
Title Ecological effects of Spring and late Summer applications of Lambda-Cyhalothrin on freshwater microcosms
Author(s) Wijngaarden, R.P.A. van; Brock, T.C.M.; Brink, P.J. van den; Gylstra, R.; Maund, S.J.
Source Archives of Environmental Contamination and Toxicology 50 (2006)2. - ISSN 0090-4341 - p. 220 - 239.
Department(s) Alterra - Centre for Water and Climate
Aquatic Ecology and Water Quality Management
Publication type Refereed Article in a scientific journal
Publication year 2006
Keyword(s) toxiciteit - zoetwaterecologie - lambda-cyhalothrin - seizoenen - lente - zomer - oppervlaktewater - sloten - toxicity - freshwater ecology - lambda-cyhalothrin - seasons - spring - summer - surface water - ditches - active ingredient chlorpyrifos - insecticide dursban(r) 4e - aquatic risk-assessment - community responses - fate - zooplankton - organisms - mesocosms - recovery
Categories Environmental Toxicology, Ecotoxicology / Aquatic Ecology
Abstract The aim of the study was to compare the effects of the pyrethroid insecticide lambda-cyhalothrin (treated at 10, 25, 50, 100, 250 ng active ingredient a.i./L) on a drainage ditch ecosystem in spring and late summer. Microcosms (water volume approximately 430 L) were established using enclosures in a 50-cm¿deep experimental ditch system containing communities typical of macrophyte-dominated freshwater ecosystems. Effects on macroinvertebrates, zooplankton, phytoplankton, macrophytes, and community metabolism were assessed and evaluated using univariate and multivariate statistical techniques. The macroinvertebrate community responded most clearly to treatment and, as anticipated, insects and crustaceans were among the most sensitive organisms. Statistical analysis showed that the underlying community structure was significantly different between the spring and summer experiments. However, the most sensitive species (Chaoborus obscuripes and Gammarus pulex) were abundant in spring as well as in late summer. In spring and late summer, only slight and transient effects were observed at the community level in the 10-ng/L treatment. Overall, the study did not show substantial differences in the responses of sensitive taxa between spring and late summer treatments, and effects thresholds were similar irrespective of season of treatment.
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