Not good for native zooplankton and mollusk populations. I think buffalo and common carp will eat some of them. Might help Bridgeport's small mouth numbers and size.
They have left most waters in better shape after they run through the lake. As for Bridgeport the bass fishing out here is pretty damn good. You better have some weight if you want to win a tournament here. Up until August you needed 20lbs or better. Spring into summer there were a bunch of 25lb bags.
The water quality out here now is excellent.