F. Water Hyacinth, Eichornia 1. pest to people in many areas of Southern U.S., S. America and Africa 2. Has subsequently spread westward and southward through most of temperate North America. Accidentally introduced to North America from Europe 2. Can interfere with water recreation such as boating, fishing, and swimming. Floating canopy can also crowd out important native water plants 4.
Fragments clinging to boats and trailers can spread the plant from lake to lake.
Introduced to North America in Florida sometime during the 1950's. 2. Can completely choke entire lakes and public water supplies. Some consequences of intentional invasions A. Fish 1. 44 species of fish in the US were endangered by the introduction of non-native fishes. Spread via canals and shipping example Sea Lamprey, Petromyzon marinus 2. The sea lamprey is a parasite that attaches to deepwater fish, especially lake trout and chubs.