A
species that
flourishes in almost any
environment; may tend to
damage the
host environment; often introduced into an
ecosystem (
invasive exotics); it is adaptable, frequently a fast breeder.
Examples:
Kudzu;
rats;
crows;
mongoose;
crabgrass;
ragweed;
coyotes;
cockroaches;
humans.
Pretty much all that's gonna be left.