An invasive species is a species that has been introduced to an ecosystem where it is not native, and whose introduction causes or is likely to cause environmental harm or harm to human health. The most important aspect of an organism that makes it an invasive species is its ability to thrive and reproduce in the new environment, often at the expense of native species. Invasive species often have certain traits that give them an advantage over native species, such as rapid reproduction rates, aggressive growth, lack of natural predators or parasites in the new environment, and the ability to tolerate a wide range of environmental conditions. These characteristics allow invasive species to outcompete native species for resources such as food, water, and habitat, leading to a decline in biodiversity and ecosystem health.
