20 Facts About Exotic species

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 distributional range, but which has arrived there by human activity, directly or indirectly, and either deliberately or accidentally.

The process of human-caused introduction is distinguished from biological colonization, in which Exotic species spread to new areas through "natural" means such as storms and rafting.

Immigrant Exotic species are Exotic species that travel, sometimes by themselves, but often with human help, between two habitats.

Such Exotic species might be termed naturalized, "established", or "wild non-native Exotic species".

Invasive Exotic species are those introduced Exotic species that spread widely or quickly and cause harm, be that to the environment, human health, other valued resources, or the economy.

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Early detection and rapid response is the most effective strategy for regulating a pest Exotic species and reducing economic and environmental impacts of an introduction.

Intentional introductions have been motivated by individuals or groups who either believe that the newly introduced Exotic species will be in some way beneficial to humans in its new location or, Exotic species are introduced intentionally but with no regard to the potential impact.

Non-native Exotic species can become such a common part of an environment, culture, and even diet that little thought is given to their geographic origin.

Some Exotic species have escaped horticultural control and become invasive.

In other cases, Exotic species have been translocated for reasons of "cultural nostalgia", which refers to instances in which humans who have migrated to new regions have intentionally brought with them familiar organisms.

Exotic species deliberately released eighty starlings into Central Park in New York City in 1890, and another forty in 1891.

Yet another prominent example of an introduced Exotic species that became invasive is the European rabbit in Australia.

Special case of introduction is the reintroduction of a Exotic species that has become locally endangered or extinct, done in the interests of conservation.

Introductions or translocations of Exotic species have been proposed in the interest of genetic conservation, which advocates the introduction of new individuals into genetically depauperate populations of endangered or threatened Exotic species.

Over 200 Exotic species have been introduced to the San Francisco Bay in this manner making it the most heavily invaded estuary in the world.

For instance, Some 179 coccinellid species have been introduced to the U S and Canada; about 27 of these non-native species have become established, and only a handful can be considered invasive, including the intentionally introduced Harmonia axyridis, multicolored Asian lady beetle.

However the small percentage of introduced Exotic species that become invasive can produce profound ecological changes.

Whether an exotic will become an invasive species is seldom understood in the beginning, and many non-native ornamentals languish in the trade for years before suddenly naturalizing and becoming invasive.

Many introduced Exotic species require continued human intervention to survive in the new environment.

In Taiwan, the success of introduced bird Exotic species was related to their native range size and body size; larger Exotic species with larger native range sizes were found to have larger introduced range sizes.