Invasive species

Abstract

Many species of nonnative organisms have established themselves in new estuaries as a result of human introduction, and the rate of introduction has been accelerating, probably because of increased shipping with larger ships and faster voyages. Invasions have caused extensive ecological changes in salt marshes and other coastal habitats. It is more cost-effective to prevent invasive species from establishing themselves than it is to try to eradicate them once they have become established. Invasive species threaten biodiversity, fishing, tourism, and human health. While some progress is being made, effective solutions appear to be a long way off (Bax et al., 2003).