Johns, C. E. St. Lawrence University, cjoh@music.stlawu.edu
Phelps, D. E. St. Lawrence University, none

 
ZEBRA MUSSELS AS BIOSENTINELS IN THE ST. LAWRENCE RIVER: INTERANNUAL VARIABILITY OF TRACE METALS
 
Zebra mussels (Dreissena polymorpha) constitute useful bio-sentinel organisms for monitoring bioaccumulation of selected trace metals. Mussels were previously collected from twelve sites along the international section of the St. Lawrence River in 1994. In succeeding years, 1995-1997, mussels collected from six of the same sites were analyzed for total cadmium, copper, and zinc in soft tissues. Concentrations of the three metals varied significantly among sites in each year and varied at each site among different years. Metal body burdens calculated for each site were highly correlated with animal size. Body burdens of metals for standard-size animals, predicted by linear regressions, showed inter-annual variability among sites, but the pattern differed from inter-annual variation in metal concentrations. Information on long-term variability in metal levels in the mussels is essential for assessing trends in biologically available metals along the river.
 
Day: Wednesday, Feb. 3
Time: Poster
Location: Sweeney Center
 
Code: SS18WE1327S