There is a strong consensus in the fields of ecology and conservation biology that invasive exotic species pose one of the greatest threats to the integrity of native ecosystems in the U.S. and around the world. Among the most notable effects are modifications of competitive interactions, promotion of invasion by other non-indigenous plants and animals, hybridization with native species and consequent alteration of the gene pool, changes in the physical structure of ecosystems and communities, increased erosion, shifts in phenology, new disturbance patterns, and altered successional paths.
Did You Know?
The first publication of the Smithsonian Institution in 1848 was an extensive survey of archeology sites that included all of the sites at Hopewell Culture NHP. The book was authored by Ephraim Squier (left) and Edwin Davis (right), residents of the town of Chillicothe where Hopewell Culture NHP is located.