Invasive species

An invasive species is an introduced organism that negatively alters its new environment.davis Although their spread can have beneficial aspects, invasive species adversely affect the invaded habitats and bioregions, causing ecological, environmental, and/or economic damage.ehrenfeld2010 Sometimes the term is used for native species that invade human habitats and become invasive pests. In the 21st century they have become a serious economic, social, and environmental threat.