Effects of the Herbicide Metazachlor on Phytoplankton and Periphyton Communities in Outdoor Mesocosms

The effects of the chloroacetanilide herbicide metazachlor have been investigated in outdoor artificial mesocosms. Decreasing phytoplankton densities were caused by the application, however, the communities recovered after 30 to 35 days. Periphyton growth was found to be affected not only by the her...

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Bibliographic Details
Published in:	Acta Hydrochimica et Hydrobiologica Vol. 31; no. 6; pp. 482 - 490
Main Authors:	Noack, Udo, Geffke, Thomas, Balasubramanian, Ramani, Papenbrock, Jutta, Braune, Mike, Scheerbaum, Dirk
Format:	Journal Article
Language:	English
Published:	Weinheim WILEY-VCH Verlag 01-03-2004 WILEY‐VCH Verlag
Subjects:	Abtrift Artificial Pond Chlorophyll-a Ecotoxicity Künstlicher Teich Multi-species Test Multi-Spezies-Test Plankton Community Planktongemeinschaft Runoff Spray Drift Ökotoxizität
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Summary:	The effects of the chloroacetanilide herbicide metazachlor have been investigated in outdoor artificial mesocosms. Decreasing phytoplankton densities were caused by the application, however, the communities recovered after 30 to 35 days. Periphyton growth was found to be affected not only by the herbicide application but by the presence of species with different ability to grow on artificial substrates. Zooplankton diversity was small due to low density of ingestible algae species. Oxygen saturation was found to be correlated with the dosage levels of the herbicide in the second half of the study. Effekte des Herbizids Metazachlor auf Phytoplankton‐ und Periphyton‐Gemeinschaften in Freiland‐Mesokosmen Es wurden die Effekte des Chloracetanilid‐Herbizids Metazachlor auf Freiland‐Mesokosmen untersucht. Infolge der Herbizidapplikation lagen geringe und konzentrationsabhängige Phytoplanktondichten vor, nach 30 bis 35 Tagen traten Erholungseffekte auf. Das Wachstum von Periphyton wurde nicht nur durch die Herbizidapplikation beeinflusst, sondern auch durch die unterschiedliche Fähigkeit zum Wachstum auf künstlichen Substraten. Eine insgesamt geringe Phytoplanktondichte induzierte eine schwache Abundanz des Zooplanktons. Die Sauerstoffsättigung in der zweiten Hälfte der Studie korrelierte mit der Dosierung des Herbizids.
Bibliography:	ArticleID:AHEH200200508 istex:2336C676DE412B80B5E8B63B51DAE70C3345871A ark:/67375/WNG-7FPB9D6T-H ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0323-4320 1521-401X
DOI:	10.1002/aheh.200200508