Exotic+and+invasive+species

=Exotic and Invasive species=

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An invasive species comes from a foreign or **exotic** ecosystem, and is transported into a new region, sometimes accidentally and sometimes intentionally. Once in the new ecosystem, a species can become invasive if it has no natural predators, and is able to reproduce so quickly that it overwhelms its new environment, dispersing at an explosive rate. An invasive species can drive native species to extinction by various means ranging from transporting disease to monopolizing a vital resource such as food for an animal or light for a plant.=====

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Biologists assert that exotic plants are found in the cliffs in the Chesapeake coastal ecosystem in Calvert and Cecil counties, **subtracting potential habitat from the Puritan tiger beetle** (7). These exotic species include common chickweed (Cerastrium fontanum), Queen Anne's lace (Daucus carota), and wild garlic (Allium vineale) (27). You will see that part of the recovery plan addresses the increased amount of vegetation in the Maryland cliffs. =====