Invasive Species
An invasive species, invasive species exogenous or invasive exotic species is an alien exotic species that becomes an agent of disturbance detrimental to the autochthonous biodiversity of the natural or semi-natural ecosystems from which it has established itself. Biological invasions are now considered by the United Nations as one of the major causes of biodiversity loss, with pollution, ecological fragmentation of ecosystems and hunting, fishing and overexploitation of some species. "The term invasive species is associated with a species, subspecies or entity of a lower taxonomic level that is outside its range or its potential range and is applicable to any part of an individual likely to survive and reproduce. "In reality, it is necessary to speak of" invasive population "and not of invasive species, and in some species only a few subspecies have become invasive.