Daphnia behavioural responses to taste and odour compounds: ecological significance and application as an inline treatment plant monitoring tool
- Watson, S.B. Environment Canada, Canadian Centre for Inland Waters, Burlington, ON, Canada (E-mail: sue.watson@ec.gc.ca)
- Jüttner, F. Limnological Station, University of Zürich, Seestrasse 187, 8802 , Kilchberg, Switzerland (E-mail: juttner@limnol.unizh.ch)
- Köster, O. Wasserversorgung Zürich, Qualitätsüberwachung / Biologie, CH-8023 , Zürich, Switzerland (E-mail: oliver.koester@wvz.stzh.ch)
Published in:
- Water Science and Technology. - IWA Publishing. - 2007, vol. 55, no. 5, p. 23-31
English
Continuous monitoring of volatile organic compounds (VOC) in raw water is highly desirable for taste and odour management, but in most treatment plants this capacity is lacking. We used a bbe©Daphnia toximeter installed in the Zurich water treatment plant to determine if Daphnia magna could be used to monitor odour compounds in source-water. Trace levels of two widely distributed biogenic VOCs in freshwater: β-cyclocitral and 2(E),4(E),7(Z)-decatrienal were added to the raw water inflow to chambers containing test animals and their behaviour was recorded using a high resolution camera. We observed that each compound elicited a marked short-term increase in Daphnia swimming velocity, but the effect was brief and an acclimation to the compounds was observed after a time period or with repeated additions. The results demonstrate that the toximeter has considerable potential as a tool to monitor certain VOCs in water, and that Daphnia perceive and react to 2(E),4(E),7(Z)-decatrienal and β-cyclocitral at concentrations between 2.5 and 25 μM
- Language
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- English
- Open access status
- green
- Identifiers
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- DOI 10.2166/wst.2007.158
- ISSN 0273-1223
- Persistent URL
- https://sonar.ch/global/documents/274504
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