They can, but don't always, outcompete natives by reproducing faster, competing for food and habitat more efficiently, or thriving in the absence of natural predators. Not all species introductions become established or cause problems, but if they do, elimination is almost always impossible causing devastation to the local environment and economy. As our world becomes more globally linked through international trade, the risk of accidental releases of exotic species will likely continue to increase. Some common ways these plants and animals are possibly being spread throughout Minnesota is by boaters, gardeners, anglers, aquarium and water garden hobbyists, biological supply traders, and nursery traders. Exotics aren't everywhere, but they could be in your lake.
Prevention is key because elimination is almost always impossible in natural waters.
This is especially true if you use your boat on more than one water body within a short period of time, or if you moor your boat in the water for an extended time. Often, citizens are the first to discover new infestations. In many zebra mussel-infested lakes in the United States, citizens have detected them first, long before they encrusted docks and pilings, or littered shorelines. Early detection helps prevent and contain the spread of exotics, thus aiding in the protection of water resources throughout the state. Report suspicious plants and animals to the Minnesota Department of Natural Resources, Minnesota Sea Grant or the Region 3 United States Fish and Wildlife Service office listed below.