SS1.01 Assessing Potential Environmental Impacts of Aquaculture
Date: Thursday, June 13, 2002
Time: 2:15:00 PM
Location: Lecture Theatre
 
SelbieDT, Queen's University, Kingston, Canada, selbied@biology.queensu.ca
Clerk, S, , Queen's University, Kingston, Canada, clerks@biology.queensu.ca
Smol, J, P, Queen's University, Kingston, Canada, smolj@biology.queensu.ca
 
NUTRIENT IMPACTS ON FRESHWATER LACUSTRINE SYSTEMS FROM CAGE AND HATCHERY AQUACULTURE: A PALEOLIMNOLOGICAL PERSPECTIVE
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With global aquaculture production increasing greatly in recent times, much concern has arisen over potential impacts of intensive practices on receiving ecosystems, especially freshwater lakes. Many factors influence the severity and duration of associated nutrient enrichment and oxygen depletion from such practices. In many cases, little data exist on pre-disturbance water quality and biotic community composition, making predictive impact assessment and regulation implementation difficult. Paleolimnology provides an insightful tool for providing background site conditions and interpreting aquaculture effects on aquatic systems. Using algal (diatom) and invertebrate (chironomid) paleo-indicators from lake sediments, we have tracked past nutrient and oxygen environments for two types of aquaculture operations. Impacts have been established from cage aquaculture in the LaCloche Channel of Lake Huron, Ontario and from effluent discharged from the Platte River State Fish Hatchery on the receiving waters of Big Platte Lake, Michigan.