Even if the native species are not completely eliminated, the ecosystem often becomes much less diverse. Predatory animals have a direct affect by hunting for the native animals in an area. They have subsequently been found in the Detroit, Cumberland, and Tennessee Rivers. Human individuals or agencies have both intentionally or accidentally introduced alien species into ecosystems, sometimes with devastating unintended consequences. Basically, native species haven't developed natural defenses for an exotic species and vice versa. While it is a major cost in areas where highly endangered species live a fence may be used to remove exotic species that prey on them. Often introduced species come to new areas accidentally by sneaking on to ships or planes. A number of infectious conditions are similar in appearance, regardless of species. Copyright © 2021 Elsevier B.V. or its licensors or contributors. [ebook] Canberra: Australian Government Department of Environment and Heritage, pp.1-3. The introduction of exotic fish may increase predation pressure and deplete native invertebrate populations. Biodiversity loss, also called loss of biodiversity, a decrease in biodiversity within a species, an ecosystem, a given geographic area, or Earth as a whole. Introduced species may also come to an area as a pet but be released if they become too big or difficult for their owner to care for. An invasive species is most often a non-native species (an introduced species) that spreads from a point of introduction to become naturalized and negatively alters its new environment. lack of enrichment. When a population is detected works such as poisoning are undertaken to remove these animals before they reach large numbers. Invasive Species. This article concentrates on animals with some small mentions of … Sometimes exotic species simply coexist with natives, but more often they disrupt entire ecosystems by outcompeting, displacing, sickening, or preying upon native species or interbreeding with native species causing hybridization. How are native species different from an endemic species? An exotic species is an animal, plant, or insect that is introduced into a place where it did not evolve naturally. My Times column on the causes of extinction:. Exotic species may seriously disrupt delicate ecological balances and may produce a plethora of unintended yet harmful consequences. Some species are endemic to regions, while others are introduced (also known as exotic or alien species). Introductions may also be deliberate. Exotic species that cause these negative impacts can be described as nuisance, injurious, or invasive, depending on the general degree of harm. … stress. Available at:
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