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BEHAVIORAL AND PHYSIOLOGICAL RESPONSES OF DAPHNIA MAGNA, CHLORELLA VULGARIS, LEPOMIS MACROCHIRUS, AND VIBRIO FISCHERI TO TOLUENE
Citation:
ALLEN, JOEL J., D. MACKE, L. HECKMAN, N. MUHAMMAD, AND R. SINHA. BEHAVIORAL AND PHYSIOLOGICAL RESPONSES OF DAPHNIA MAGNA, CHLORELLA VULGARIS, LEPOMIS MACROCHIRUS, AND VIBRIO FISCHERI TO TOLUENE. Presented at SETAC Annual Meeting, Montreal, QC, CANADA, November 07, 2006.
Impact/Purpose:
To inform the public
Description:
The research presented here is a continuation of work designed to further the science of available and developing online toxicity monitors(OTMs) and how they may be most effectively deployed in a watershed management plan and/or water quality early warning system. Source waters of the U.S. are vulnerable to natural and anthropogenic factors affecting quality for use as drinking water including physical parameters such as increased turbidity, ecological cycles such as algal blooms, and episodic contamination events (both unintentional and intentional). The systems studied here are an attempt to continuously quantify toxicity in a dynamic sample providing water quality managers needed continuous, time-relevant information regarding the status of water quality. A major effort of this research is the development of a sensitivity response matrix for various OTMs providing a toxicological context for their use in monitoring water quality. This research is ongoing at the U.S. EPA Early Warning Systems Laboratory (EWSL), Cincinnati, OH. OTMs currently under study at the EWSL are 1. DaphTox (Daphnia magna swimming behavior, BBE) 2. AlgaeTox (Chlorella vulgaris photosynthetic efficiency, BBE) 3. Bivalve Monitor (Corbicula fluminea gape behavior, University of North Texas/U.S. EPA), 4. Real-Time Environmental Protection System (Lepomis macrochirus ventilatory behavior, USACEHR/GeoCenters/IAC), and 5. ToxControl(Vibrio fischeri luminescence, Microlan). Results presented here are for the contaminant toluene. Exposures for systems 1 and 4 were 2 hours; system 2, 35 minutes; and system 5, 15 minutes. Results to date demonstrate that these sensors are sensitive to toluene over relatively short durations. The DaphTox detected >1mg/L toluene. The AlgaeTox detected >50mg/L. The Fish Ventilatory system detected >5mg/L toluene. The ToxControl detected > 2mg/L toluene. Complete dose response results for the toxicants will be presented.