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Exotic species are plants and animals released accidentally
or intentionally into areas where they are not native. Such
introductions usually occur through human activities. Removing
a species from its native environment frees it from natural
predators, parasites, pathogens, and competitors that limit
its numbers. A newly-introduced exotic species is often capable
of explosive population growth.
This Lake Notes publication will introduce you to some aquatic
exotics that could become a problem in your lake. Included
are profiles of seven exotics that are currently present throughout
Illinois or are spreading through the state. Each profile
will help you identify the species and give you some background
on how it spreads and what effects it can have on a lake ecosystem.
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