As reported by the Detroit Free Press, there is a study, due out in its full form next year, that concludes that efforts to stop the flow of invasive species into the Great Lakes system have failed. The author of the study, Gary Fahnenstiel, is advocating closing the Welland Canal that connects Lake Erie to Lake Ontario. Could it really be that easy to prevent new invasions? Well, from an environmental standpoint, yes. Add economics to the mix and there is suddenly no clear solution.
Z*lda from Mute Complications also points us to this excellent article from the Milwaukee Journal Sentinel, about Asian carp in Lake Michigan. It's part of a series, so be sure to check out the links in the right-hand column.