🚀 go-pugleaf

>I am wondering if anybody is aware of any studies (published or in the
>works) where patterns of species richness (or species diversity, or
>biodiversity...) have been evaluated using the Ecoregion as the unit for
>determining presence/absence?

>Eric A. Holt

A major study was recently completed that used ecoregions as the basis for
a conservation assessment across the U.S. and Canada. Among other things,
species richness and endemism of seven taxonomic groups--native vascular
plants, birds, butterflies, mammals, reptiles, amphibians, and terrestrial
mollusks--as well as several subgroups (e.g., trees, conifers) were
calculated for each of 116 ecoregions (a modification of Omernick's
ecoregion classification). It's an excellent source of information.

The citation is:

Ricketts, T., E. Dinerstein, D. Olson, C.Loucks, W. Eichbaum, K. Kavanagh,
P. Hedao, P. Hurley, K. Carney, R. Abell, and S. Walters. 1997. A
conservation assessment of the terrestrial ecoregions of North America.
Volume 1. The United States and Canada. World Wildlife Fund, Washington,
DC. 547 pp.

And the contact is:

Eric Dinerstein
Chief Scientist
World Wildlife Fund U.S.
1250 24th Street, NW
Washington, DC 20037
email: eric.dinerstein@wwfus.org


Reed F. Noss
Conservation Biology Institute
800 NW Starker Ave., Suite 31C
Corvallis, OR 97330
nossr@ucs.orst.edu
phone: 541-757-0687
fax: 541-757-7991
web page: www.consbio.org