Invasive species,

Invasive species,

Invasive species,

Invasive species,

• • Invasive species, also called introduced species, alien species, or exotic species, any nonnative species that significantly modifies or disrupts the ecosystems it colonizes. Such species may arrive in new areas through natural migration, but they are often introduced by the activities of other species. Human activities, such as those involved in global commerce and the pet trade, are considered to be the most common ways invasive plants, animals, microbes, and other organisms are transported to new habitats. Most introduced species do not survive extended periods in new habitats, because they do not possess the evolutionary adaptations to adjust to the environment.
• invasive species can harm both the natural resources in an ecosystem as well as threaten human use of these resources. An invasive species can be introduced to a new area via the ballast water of oceangoing ships, intentional and accidental releases of aquaculture species, aquarium specimens or bait, and other means.
• Invasive species are capable of causing extinctions of native plants and animals, reducing biodiversity, competing with native organisms for limited resources, and altering habitats. This can result in huge economic impacts and fundamental disruptions of coastal and Great Lakes ecosystems.
• Two invasive species, the American bullfrog and the brown tree snake, cost the world an estimated $16 billion between 1986 and 2020 by causing problems ranging from crop damage to power outages, according to a study published on Thursday.
• The brown-and-green frog known as lithobates catesbeianus that can weigh over 2 pounds (0.9 kilos), had the greatest impact in Europe, according to research published in Scientific Reports.
• The brown tree snake, or boiga irregularis, has multiplied uncontrollably on Pacific islands including Guam and the Marianna Islands, where the species was introduced by U.S. troops in World War II, said researcher Ismael Soto.
• The snakes have at times been so abundant that they caused power outages by crawling on electrical equipments.