cant find the refuge you are speaking of or any info about what you said. I copied the following for you. If you can give me info about the refuge, when, who, or whatever I am really interested in looking at the situation. Here is some stuff you all should keep in your fodder, the links are provided as well a - below. also look up Executive Order 13112
NN vs invasive What are invasive species (also defines the terms ?exotic? and ?native?)?
A: To understand what an invasive species is, one must first understand the difference between an exotic species and a native species. 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. 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. These definitions come from Executive Order 13112.
Q: Are all exotic (non-native) species considered invasive?
A: No, not all exotic species are invasive. In many cases, a species not native to an area is not adapted to it. If you introduced African elephants to Alaska - they would not survive. In other cases, however, a new species can do well in a new habitat, such as striped bass introduced to the Sacramento River in California. Only in a few cases do introduced species "go wild" and grow invasively, beyond acceptable levels. Current research seems to indicate that approximately 4-19% of the non-native species introduced into the U.S. might be invasive (U.S. Congress, Office of Technology Assessment, 1993).
Return to Frequently Asked QuestionsReturn to Invasive Species Web Portal Index Page
Q: Are all exotic species harmful?
A: No, not all exotic species are considered harmful. Non-native plants are fundamental to our lifestyle - most of our food crops, such as potatoes and wheat, are not native to the United States. Invasive species, however, are exotic organisms that have gone beyond being useful and have become harmful. A species is not usually recognized as invasive until it causes some sort of harm or cost to the ecology, economy, or to human health. Attempts to plant kudzu as a forage crop and an ornamental plant and attempts to develop a nutria population for fur harvest, for example, both backfired and have now become invasive species problems. There are some benefits to all species - but invasive species do more harm than good.
An 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. 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. In addition to the many invasive species from outside the U.S., there are many species from within the U.S. that are invasive in other parts of the country because they are not native to the ecosystem in which they have become established.
Q: How can we know if an exotic species has the potential to be invasive?
A: Although there is not one specific trait or a specific set of traits common to all invasive species, there is a suite of traits that invasive species often have. Not all invasive species will have all of these traits, but most invasive species seem to have one or more of these traits. The traits include (Williams and Meffe, 1998):
High rate of reproduction
Pioneer Species (able to colonize areas after they have been disturbed)
Short generation times
Long-lived
High dispersal rates
Single-parent reproduction
Vegetative or clonal reproduction
High genetic variability
Broad native range / Tolerant of wide range of conditions / Habitat generalist (can live in many different types of habitats)
Abundant in native range
Broad diet
Gregarious
Human commensal (lives in close association with humans)
http://www.fws.gov/invasives/nwrs.html
http://www.fws.gov/invasives/faq.html
http://www.fws.gov/invasives/faq.html#q1
http://www.fws.gov/invasives/faq.html#q5