SS1.01 Assessing Potential Environmental Impacts of Aquaculture
Date: Thursday, June 13, 2002
Time: 4:15:00 PM
Location: Lecture Theatre
 
McGreerER, BC Ministry of Water, Land and Air Protection, Nanaimo, CANADA, eric.mcgreer@gems9.gov.bc.ca
Taekema, B, T, BC Ministry of Water, Land and Air Protection, Nanaimo, CANADA, btaekema@gems5.gov.bc.ca
Dalby, J, E, BC Ministry of Water, Land and Air Protection, Nanaimo, CANADA, james.dalby@gems5.gov.bc.ca
Erickson, L, J, BC Ministry of Water, Land and Air Protection, Nanaimo, CANADA, lloyd.erickson@gems2.gov.bc.ca
 
USE OF PHYSICAL-CHEMICAL MEASURES AS SURROGATES FOR CHANGES IN BENTHIC COMMUNITY STRUCTURE IN THE VICINITY OF COASTAL SALMON FARMS, BRITISH COLUMBIA, CANADA
image
A suite of sediment chemical and physical indicators was evaluated as potential surrogates of the health of benthic communities near fish farm operations on the BC coast. A multi-year field program was conducted to collect data on sediment chemical, physical and biological characteristics in areas adjacent to farm operations and in appropriate reference areas. Levels of free sulfides in sediment pore waters were found to be reasonable surrogates of changes in benthic community structure. Regression analysis was used to determine free sediment sulfide thresholds associated with 50% reductions in biological community values. A comparison of values at reference sites was also undertaken. Results of these analyses will be presented together with a comparison of our findings to those in the recent scientific literature. These studies were one component of a program to develop scientifically defensible, results-based waste management standards for the British Columbia salmon farming industry.