Impacts to Natural Resources and the Environment The following discussion highlights examples of each of these impacts. The unnaturally large population numbers can then have severe impacts. However, when an organism is introduced into an ecosystem in which it did not evolve naturally, it no longer has those limits and its numbers can sometimes dramatically increase. These checks and balances form the complex web of life that makes up an ecosystem and in which a native species competes for survival. These checks and balances include such things as: predators, herbivores, diseases, parasites, other organisms competing for the same resources and limiting environmental factors. The reason for this is that in a natural or native community, species evolve together into an ecosystem with many checks and balances that limit the population growth of any one species.
When non-native species are introduced into an ecosystem in which they did not evolve their populations sometimes explode in numbers. Return to Invasive Species Web Portal Index PageĪ: The introduction of invasive species can have a dramatic effect on our natural resources, human health, and economy.that are invasive in other parts of the country because they are not native to the ecosystem in which they have become established. In addition to the many invasive species from outside the U.S., there are many species from within the U.S. It is important to note that when we talk about a species being invasive, we are talking about ecosystem or environmental boundaries, not political ones. These definitions come from Executive Order 13112.Īn invasive species is an exotic species whose introduction into an ecosystem in which the species is not native causes or is likely to cause environmental or economic harm or harm to human health. Other terms sometimes used for exotic species include “non-native.” “non-indigenous,” and “alien.” A native species is a species that, other than as a result of an introduction, historically occurs/occurred in that particular habitat. An exotic species is any species, including its seeds, eggs, spores, or other biological material capable of propagating that species, that is not native to that habitat. Q: What are invasive species (also defines the terms “exotic” and “native”)?Ī: To understand what an invasive species is, one must first understand the difference between an exotic species and a native species. Where can I go for other fish and wildlife related questions that do not involve invasive species?.Is the Fish and Wildlife Service the only part of the Federal Government that cares about invasive species?.What is the Service doing about Invasive Species?.Why does the Fish and Wildlife Service care about invasive species?.Why do aquatic nuisance species and aquatic habitats deserve special attention?.What is the Aquatic Nuisance Species Task Force? How does it relate to the Non-Indigenous Aquatic Nuisance Species Prevention and Control Act?.What is the Non-Indigenous Aquatic Nuisance Species Prevention and Control Act?.How can I find information on a particular species?.How can I receive informational alerts about invasive species in my State or Region?.Where can I learn more about invasive species?.
Where can I find lists of native plants suitable for my area?
Where can I get a list of the Federal or State noxious weeds?.Where can I go to report an invasive species on public land?.What can I do if I have invasive species on my property?.How can I determine if a plant or animal I have seen or caught is invasive?.How are invasive species eradicated, controlled and/or managed?.How can we know if an exotic species has the potential to be invasive?.How many invasive species are there in the U.S?.Are all exotic (non-native) species considered invasive?.How do invasive species get to the United States?.What are invasive species (also defines the terms “exotic” and “native”)?.
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