Tuesday, November 14, 2006 - 11:00 AM

Toxicological effects of Military Smokes and Obscurants on Selected Aquatic Plant Species.

Thomas Smith1, Dr. Donald Cropek1, Dr. David Soucek2, and Dr. Carole Lembi3. (1) U.S. Army Corps of Engineers, Engineer Research and Development Center, Construction Engineering Research Laboratory, P.O. Box 9005, Champaign, IL 61826, (2) Illinois Natural History Survey, Champaign, IL 61820, (3) Purdue University, Department of Botany and Plant Pathology, West Lafayette, IN 47907

Military training and testing can be land use intensive and thus has a resultant but generally unquantified effect on aquatic ecosystems.  Military obscurant and other smokes are used as part of U.S. Army and other military training.  Effects of military smokes have not been adequately investigated.  As a component of broader aquatic ecology and chemical and toxicological investigations of military smokes, we subjected Sago pondweed and green algae to actual field exposure conditions of five different smokes with variables of time (0 – 120 min), distance from release point (0 - 250 m), and weather conditions (spring, summer).  Concurrently, we collected depositional data on the different smokes.  Initial results of these exposures and collections will be presented.  Preliminary results indicate little or no short term (0 – 48 hrs) toxicological effect on the species involved.  Analysis of the deposited chemical constituents will presented, together with chemical exposure concentrations.  Further analysis and study is expected to provide information useful in sustaining military capability, aquatic toxicology, aquaculture, and species and fisheries management and recovery.