Overpopulation is the concept where an increased species population exceeds the carrying capacity of the environment. A consequence of this will be extinction of other species. In Australia's south-west, feral cats have been predating on endemic animal species like numbats, dibblers and other marsupials. Many of these are critically endangered and close to extinction. Another consequence will be insecurity within the population. This is more relevant to humans as we still need to find a way to feed the world and give them a high quality of life without destroying the world. A third consequence will be biodiversity decrease. It is interconnected with extinction as other predators will need to predate on something else and decrease diversity of prey.