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Hense, B.A. ; Jaser, W. ; Welzl, G. ; Pfister, G. ; Wöhler-Moorhoff, G.F. ; Schramm, K.-W.

Impact of 17alpha-ethinylestradiol on the plankton in freshwater microcosms-II: Responses of phytoplankton and the interrelation within the ecosystem.

Ecotoxicol. Environ. Saf. 69, 453-465 (2008)
DOI PMC
Open Access Green as soon as Postprint is submitted to ZB.
Effects of 17alpha-ethinylestradiol (EE) on phytoplankton were investigated in a lentic freshwater microcosm study. Treatment with EE caused a shift in the species composition as shown by a principle response curve. Whereas densities of Cyanophyceae, Dinophyceae, and Chrysophyceae increased, those of Conjugatophyceae and Cryptophyceae decreased. Furthermore, relative density of Chlorophyceae declined after EE treatment. The changes showed taxa-specific time dependencies. Some species, especially the cyanobacterium Cyanobium parvum, bloomed after the treatment. EE treatment promoted total abundance and biomass of phytoplankton. Although the number of species per microcosm increased, the diversity indices (Shannon-Wiener, Simpson) tended to lower values. The ecosystem only partly recovered during the investigated post-treatment period of 6 weeks. Probably at least the main effects were caused indirectly, i.e. via decrease of grazing zooplankton (crustaceans). The relation of EE to variation of phytoplankton composition was closer than those of other abiotic factors, indicating the relevance of its impact. EE also probably affected nutrients of the phytoplankton.
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Publication type Article: Journal article
Document type Scientific Article
Corresponding Author
Keywords 17alpha-ethinylestradiol; Phytoplankton; Indirect effects; Aquatic microcosms
ISSN (print) / ISBN 0147-6513
e-ISSN 0147-6513
Journal Ecotoxicology and Environmental Safety
Quellenangaben Volume: 69, Issue: 3, Pages: 453-465 Article Number: , Supplement: ,
Publisher Elsevier
Non-patent literature Publications
Reviewing status Peer reviewed
Institute(s) Institute of Ecological Chemistry (IOEC)
Institute of Biomathematics and Biometry (IBB)
Institute of Developmental Genetics (IDG)