define exotic species
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An exotic species, with respect to a particular ecosystem, refers to any species, including its larvae, seeds, eggs, spores, or other biological material capable of propagating the species, which is not native to that ecosystem (Beck et al., 2008).An introduced species, alien species, exotic species, adventive species, immigrant species, foreign species, non-indigenous species, or non-native species is a species living outside its native ..Examples include most crop plants and domesticated animals that we raise, many types of sport fish, and many organisms that are natural enemies of important insect pests. However, exotic species also can be very harmful.Invasive species, however, are exotic organisms that have gone beyond being useful and have become harmful. A species is not usually recognized as invasive until it causes some sort of harm or cost to the ecology, economy, or to human health.Invasive species can change the food web in an ecosystem by destroying or replacing native food sources. The invasive species may provide little to no food value for wildlife. Invasive species can also alter the abundance or diversity of species that are important habitat for native wildlife.
An exotic species, with respect to a particular ecosystem, refers to any species, including its larvae, seeds, eggs, spores, or other biological material capable of propagating the species, which is not native to that ecosystem.Examples include most crop plants and domesticated animals that we raise, many types of sport fish, and many organisms that are natural enemies of important insect pests. However, exotic species also can be very harmful.