Are your refering to The Theory of Island Biogeography by McArthur and = Wilson? =20 Malcolm L. McCallum Assistant Professor Department of Biological Sciences Texas A&M University Texarkana 2600 Robison Rd. Texarkana, TX 75501 O: 1-903-233-3134 H: 1-903-791-3843 Homepage: https://www.eagle.tamut.edu/faculty/mmccallum/index.html =20
________________________________ From: Ecological Society of America: grants, jobs, news on behalf of = Dave Whitacre Sent: Fri 4/7/2006 3:34 PM To: [email protected] Subject: invasive species--the broader, long-term perspective I realize that this interesting thread (which I have mostly just =3D skimmed) has been largely in search of hard data on =3D extinctions/extirpations. But for the longer-term view, I keep thinking of that paper (I'm sure = =3D someone can supply the reference) that somehow used species-area curves = =3D for different-sized portions of the globe in order to suggest what the = =3D planet's ultimate species richness would be if species' distributions = =3D were homogenized so that "everything occurs everywhere". The prediction = =3D was, of course, shocking. A major reason that global species richness is = =3D as high as it is, is that different species occur in different areas. While we can debate the quality of evidence, and it is certainly =3D worthwhile to study the mechanisms involved, does anyone doubt that the = =3D truly long-term result of the continued spread of exotics will be many = =3D extinctions? Dave Whitacre
