That is interesting for sure, but correlation doesnt always mean causation. To my knowledge zebra mussels need something to attach too in order to survive so like rock, rubble, etc. I would tend to believe lakes that have an abundance of this type of bottom content would be higher in mercury levels than lakes without it. I could certainly be wrong however. Regardless that is an interesting read and will be even more interesting to find out if further research is done and if there is indeed a way to counteract it. Seems costly and doubtful. I thought there were lots of treatments for zebra mussels, but you really dont hear about it often. I realize its probably a losing battle, but there was one method that was introducing a bacteria or something similar that essentially sterilized the mussels. No idea how that would affect anything else, but mussels filter the water while fish do not.
Bingo!