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Biological invasions

Of all species which arrive to a new territory, only some are introduced into the natural environment. Some of these introduced species succeed in reproducing and forming stable populations. Of the established populations, some are capable of out-of-check expansion in the environment, leading to their consideration as invasive species.

Only a part of invasive species cause grave problems in the host territory, but when they do, the problem becomes very difficult to confront. They can cause ecological impacts (displacement of native species, changes in the structure and function of the ecosystem, etc.) and socio-economic impacts with significant repercussions. The costs of eradication are often very large and not very effective, and for this reason prevention measures are recommended. 

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