View Full Document

An Essay on Some Topics Concerning Invasive Species



View the full content.
View Full Document
View Full Document

7 views

Unformatted text preview:

Austral Ecology 2004 29 530 536 An Essay on Some Topics Concerning Invasive Species JAMES H BROWN1 AND DOV F SAX2 1 Department of Biology University of New Mexico Albuquerque New Mexico 87131 USA Email jhbrown unm edu and 2Department of Ecology Evolution and Marine Biology University of California Santa Barbara California USA Abstract There is a tendency for both scientists and lay people to regard invading alien species as inherently bad and native species as inherently good Past invasions occurred commonly without human assistance They rarely caused large lasting decreases in species richness or ecological damage Current invasions provide opportunities for scientific study They are unintentional uncontrolled experiments which can provide insights into attributes of successful colonists relationships with native species and impacts on the structure and function of ecological systems Key words Biogeography biological invasions colonization exotic species invasive species species richness INTRODUCTION One of the senior author s fondest memories is a drive with Marilyn and Barry Fox and Astrid Brown in 1990 through Myall Lakes National Park in eastern New South Wales Australia Barry was driving and Marilyn was sitting in the front passenger seat Together they were pointing out objects of natural history interest Periodically we would stop and get out to examine more closely something special a rare plant bandicoot diggings or an area that had burned some known time ago More frequently however we stopped so that Marilyn could wage war on an exotic plant Seedlings and small saplings of Pinus radiata a tree native to North America were growing along the roadway Each time Marilyn spotted one she would command Barry to pull over charge out of the car pull up the offender by the roots knock off the soil and toss the remains into the road At one point the requests to stop became so frequent several times within 100 metres that Barry gently questioned the practicality of the



Access the best Study Guides, Lecture Notes and Practice Exams

Loading Unlocking...
Login

Join to view An Essay on Some Topics Concerning Invasive Species and access 3M+ class-specific study document.

or
We will never post anything without your permission.
Don't have an account?
Sign Up

Join to view An Essay on Some Topics Concerning Invasive Species and access 3M+ class-specific study document.

or

By creating an account you agree to our Privacy Policy and Terms Of Use

Already a member?