Invasive Species Biology

Invasive Species Biology

Invasive species, also called introduced species, alien species, or exotic species, are any nonnative species that significantly modifies or disrupts the ecosystems it colonizes. Such species may arrive in new areas through natural migration, but they are often introduced by the activities of other species. Human activities, such as those involved in global commerce and the pet trade, are considered to be the most common ways invasive plants, animals, microbes, and other organisms are transported to new habitats.

The hemlock woolly adelgid, Adelges tsugae annand, is an introduced insect pest that is causing severe decline and mortality of hemlocks (Tsuga spp.) in eastern North America. We used molecular methods to clarify the relationship among hemlock adelgids worldwide and thereby determine the geographic origin of the introduction to eastern North America. The source of the introduction to eastern... Read more
Mnemiopsis leidyi, is one of the most successful marine bioinvaders on record. Native to the Atlantic coast of the Americas M. leidyi invaded the Black Sea, Caspian and Mediterranean Seas beginning the in late 1980s, followed by the North and Baltic Seas starting in 2006, with major concomitant alterations in pelagic ecology, including fishery collapses in some cases. Using extensive native range... Read more
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