Fouls Gear A recently introduced water flea from Northern Europe has begun disturbing the food chain and fishing gear in the Great Lakes. MacIsaac, H., and I.A. Grigorovich. Md. MacIsaac, H.J., et al . Invasion of Lake Ontario by the Ponto-Caspian predatory cladoceran Cercopagis pengoi. Enserink, M. 1999.
Biological invaders sweep in.
Helmuth, L. 1999. Feds plan battle against aliens. Milius, S. 1999. U.S. biosurvey reveals worrisome trends. Cost estimates rocket for uninvited guests.