Humans have also inadvertently introduced more than 100 non-native and invasive species into the lakes, such as zebra and quagga mussels, and sea lampreys that have decimated some indigenous fish populations.

人类还无意中将 100 多种非本地和入侵物种引入了湖泊，例如斑马和斑驴贻贝，以及导致一些本地鱼类数量锐减的七鳃鳗。