Non native or exotic plants sometime in congenial conditions of the region starts multiplying in a faster rate and pose problem like weed's they possess diseases and pests ( if imported without quarantine measures) , may cross infect the other crops of the region's. Partheneum. Eupatorium, Papaya mealy bug.
it can become invasive if it can adapt well and reproduce quickly and will be invasive if it has no predadators
A species that does not normally live in an area
a non native species is a species that isn't within a certain ecosystem.
Nonnative species have no natural controls or competitors and will become more and more invasive. They can crowd out native species until they no longer exist.
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I don't think they would be synonymous. Nonnative species can live in a habitat without causing any adverse effects on that habitat, the nonnative species can become invasive if it causes any negative effects on the habitat. An example of a nonnative invasive species would be the python in the Florida swamp land. These hardy snakes are wreaking havoc by eating fish, birds, even alligator eggs and babies! The two words are often used interchangeably because it is often hard to find nonnative species that do not harm the environment they are introduced to, but it is possible and seen in some fish and bird introductions.
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It could destroy a whole ecosystem or foodweb.
Imported species may damage the ecosystem.
The introduction of nonnative species has environmental consequences.
The fish shares a niche with another species