Access

You are not currently logged in.

Access your personal account or get JSTOR access through your library or other institution:

login

Log in to your personal account or through your institution.

Species Number and Endemism: The Galápagos Archipelago Revisited

Michael P. Johnson and Peter H. Raven
Science
New Series, Vol. 179, No. 4076 (Mar. 2, 1973), pp. 893-895
Stable URL: http://www.jstor.org/stable/1735348
Page Count: 3
  • More info
  • Cite this Item
Species Number and Endemism: The Galápagos Archipelago Revisited
Preview not available

Abstract

Regression analyses to determine plant species number are repeated for the Galápagos Islands with new data. The multiple curvilinear regression gives the best prediction of species number, with island area making the only significant contribution. The proportion of species endemic to the Galápagos is highest in the arid, transition zone and on small islands, and lowest in the littoral and mesic zones. This is explained in terms of zone-specific immigration and extinction rates and the very recent appearance of moist upland climates in the archipelago.

Page Thumbnails

  • Thumbnail: Page 
893
    893
  • Thumbnail: Page 
894
    894
  • Thumbnail: Page 
895
    895