Why do gull eggs have the highest level of contaminants in the bay of quinte?

Gull eggs in the Bay of Quinte have the highest levels of contaminants primarily due to the birds' feeding habits and nesting behaviors. Gulls are often at the top of the food chain, consuming fish and other organisms that may have accumulated pollutants from industrial runoff and agricultural practices in the area. Additionally, gulls often nest in urban or disturbed environments, where exposure to contaminants is higher. Consequently, the biomagnification of these pollutants in their eggs reflects the overall environmental health of the bay.