Martinez, E. A.. Washington State University, edwardm@wsunix.wsu.edu
Moore, B. A.. Washington State University,
Schaumloffel, J. Washington State University,

 
EVALUATION OF MOUTHPART DEFORMITIES AND HEAVY METALS IN CHIRONOMIDS FROM THE HEAVY METAL CONTAMINATED COEUR D'ALENE RIVER
 
Elevated rates of morphological deformities in chironomid larvae have been attributed to pollutants such as oil tars, pestecides, organochlorines, and heavy metals. The potential of chironomids as biological indicators of heavy metal contamination and bioavailability in contaminated aquatic ecosystems was assessed. Chironomid larvae and river sediment were collected from four sites in the Coeur d'Alene River system, Idaho USA. Chironomid larvae collected at contaminated sites exhibited mouthpart deformity rates between 3.8 and 10.3 percent. Larvae collected at a control site displayed a mouthpart deformity rate of 0.9%. As, CD, Cu, Ni, Pb, and Zn were determined in both larvae and sediment samples. Correlation between metal concentrations and deformities were observed for all metals, except Ni. The data also suggests that feeding habits attribute to differences in pollution tolerance among genera.
 
Day: Friday, Feb. 5
Time: 02:15 - 02:30pm
Location: Sweeney Center
 
Code: CS63FR0215S