You are not currently logged in.
Access JSTOR through your library or other institution:
If You Use a Screen ReaderThis content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Comparison of Faunal Equilibrium Turnover Rates on a Tropical Island and a Temperate Island
Jared M. Diamond
Proceedings of the National Academy of Sciences of the United States of America
Vol. 68, No. 11 (Nov., 1971), pp. 2742-2745
Published by: National Academy of Sciences
Stable URL: http://www.jstor.org/stable/61217
Page Count: 4
You can always find the topics here!Topics: Species extinction, Birds, Species, Forest habitats, Wildlife habitats, Lowlands, Extinct species, Sea birds, Area surveys, Population size
Were these topics helpful?See somethings inaccurate? Let us know!
Select the topics that are inaccurate.
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Preview not available
Rates of immigration and extinction of bird species on a tropical island, Karkar in the southwest Pacific Ocean, have been estimated from surveys made in 1914 and in 1969. Compared to a temperate-zone island of similar size and isolation (Santa Cruz off southern California), Karkar has a similar extinction rate, but a lower immigration rate expressed as a fraction of the mainland species pool, due to the sedentariness of many tropical forest birds. The probability of extinction is highest for species that are rare (due to narrow habitat requirements, large territory size, competition, recency of colonization, or marginal suitability of habitat), species with ``in-and-out'' tactics, and populations on small islands.
Proceedings of the National Academy of Sciences of the United States of America © 1971 National Academy of Sciences