Africa's invasive species problem

Control effort exacerbates invasive-species problem.

Ecosystem managers face a difficult decision when managing invasive species. If they use aggressive practices to reduce invader abundances, they will likely reduce invaders' competitive impacts on natives. But it is often difficult or impossible to reduce invaders without damaging natives. So a critical question becomes: Which is worse for native biota, invaders or things done to control invade...

Invasive species. The Galapagos Islands kiss their goat problem goodbye.

Invasive Species

Biological invasion The process by which an organism is introduced to, and establishes a sustainable population in, a region beyond its native range. Eradication The managed extirpation of an entire nonnative population. Impact The effect of a nonnative species on its environment. Invasibility The vulnerability of a habitat, community, or ecosystem to invasion. Invasion ecology A multidisciplin...

Invasive Species

Invasive species are characterized by their substantial population growth and spread outside their native ranges. Humans originally introduced most of today’s invasive species, and all regions on Earth have been affected by invasive species to some extent. Curiously, 90% or more of introduced species do not become invasive pests; rather, they die out or rely on direct human assistance to achiev...

Invasive species

An invasive species is one that arrives (oftenwith human assistance) in a habitat it had not previously occupied, then establishes a population and spreads autonomously. Species invasions are one of the main conservation threats today and have caused many species extinctions. The great majority of such invasions are by species introduced from elsewhere, although some native species have become ...