We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleOrigination, Extinction, and Dispersal: Integrative Models for Understanding Present-Day Diversity GradientsAuthorsRoy; GoldbergPublicationThe American Naturalist, 2007, Vol 170, Issue 2, pS71ISSN0003-0147Publication typearticleDOI10.2307/4541091