Abstract
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.
Keywords: Southwest Pacific, Santa Cruz, Karkar, birds, immigration, extinction
Full text
PDF
Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- Diamond J. M. Avifaunal equilibria and species turnover rates on the channel islands of california. Proc Natl Acad Sci U S A. 1969 Sep;64(1):57–63. doi: 10.1073/pnas.64.1.57. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Diamond J. M. Ecological consequences of island colonization by southwest Pacific birds. II. The effect of species diversity on total population density. Proc Natl Acad Sci U S A. 1970 Dec;67(4):1715–1721. doi: 10.1073/pnas.67.4.1715. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Diamond J. M. Ecological consequences of island colonization by southwest pacific birds, I. Types of niche shifts. Proc Natl Acad Sci U S A. 1970 Oct;67(2):529–536. doi: 10.1073/pnas.67.2.529. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Patrick R. The effect of invasion rate, species pool, and size of area on the structure of the diatom community. Proc Natl Acad Sci U S A. 1967 Oct;58(4):1335–1342. doi: 10.1073/pnas.58.4.1335. [DOI] [PMC free article] [PubMed] [Google Scholar]