Biology / Bio 3745 · Atom · ~20 seconds
Invasive Species
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An invasive species is a non-native species that spreads aggressively and causes ecological or economic harm, often lacking predators or competitors that regulated it natively.
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A predator introduced to an island with no native predators can devastate prey that evolved no defense against it.
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A non-native species is not automatically invasive — "invasive" requires demonstrated spread and harm, not mere origin.