A case of Jammu and Kashmir is one of threats to the biodiversity of region through the invasion of invasive alien species. Species which are either introduced or spread outside of their natural habitat may out-compete native species and sometimes become invasive and noxious weeds. Such species are designated as Invasive Alien Species (IAS). The study aimed to document the invasive alien species prevalent in the area along with their harmful effects. Most of the invasive alien weeds have naturally intruded into the area due to its geographical position in the vicinity of northern plains of India and have successfully colonized in most of the area. The invasive alien species studied over the period of time have been enlisted and described along with other relevant information. All the alien weeds seriously affect the native biodiversity. The severity of the problem demands appropriate eradication measures.
