Why invasive ants are a silent threat to our ecosystems

Invertebrates are often described by experts as the "little things that run the world," and ants are certainly one of the top contenders for this role. Ants help ecosystems to function normally and the total weight of all ...

Hundreds of weeds found illegally advertised online in Australia

Hundreds of weeds have been found advertised on a public online marketplace in Australia. Cacti and pond plants were among the most frequently advertised illegal weed species. These weeds are prohibited in Australia due to ...

Invasive species on the menu at London restaurant

A London restaurant is exploring whether eating invasive species such as gray squirrel, American Signal crayfish and Japanese knotweed could help fight their spread, but scientists remain skeptical.

Study on cadavers shows ant activity can mislead investigators

Understanding ant activity on bodies can help us reconstruct the events that occurred at the time of death and during early post-mortem periods. For the first time, a study has been carried out looking at 10 real cases of ...

page 1 from 40

Invasive species

Invasive species is a phrase with several definitions. The first definition expresses the phrase in terms of non-indigenous species (e.g. plants or animals) that adversely affect the habitats they invade economically, environmentally or ecologically. It has been used in this sense by government organizations as well as conservation groups such as the IUCN (International Union for Conservation of Nature).

The second definition broadens the boundaries to include both native and non-native species that heavily colonize a particular habitat.

The third definition is an expansion of the first and defines an invasive species as a widespread non-indigenous species. This last definition is arguably too broad as not all non-indigenous species necessarily have an adverse effect on their adopted environment. An example of this broader use would include the claim that the common goldfish (Carassius auratus) is invasive. Although it is common outside its range globally, it almost never appears in harmful densities.

Because of the ambiguity of its definition, the phrase invasive species is often criticized as an imprecise term within the field of ecology. This article concerns the first two definitions; for the third, see introduced species.

This text uses material from Wikipedia, licensed under CC BY-SA