Abstract
The first wave of human colonists spread across the Pacific from 4000 to 1000 years ago. That they caused many extinctions is well known from fossil finds. We estimate how many fossil species were missed - the answer is roughly half - and so estimate the true extinction rate. The first colonists exterminated roughly half the species on each island group. Some of these extinctions are falsely attributed to the first colonists, because intensive collection often began a half century after the damage initiated by European discovery. Even taken at face value, these recent extinctions are too few. Many species are so critically endangered that we know neither whether they still survive or how to save them. Interestingly, there are fewer recent extinctions and currently endangered species in the islands of the western Pacific, which were the islands occupied first by humans. We suggest that the species sensitive to human occupation died out long ago in these areas. If so, these islands would have lost even more than half of their bird species.
Subject
General Agricultural and Biological Sciences,General Biochemistry, Genetics and Molecular Biology
Reference32 articles.
1. Atkinson I.A.E. 1985 The spread of commensal species of Rattus to oceanic islands and their effects on island avifauna. In Conservation of island birds (ed. P. J. Moors) pp. 35-81. Cambridge: ICBP Technical Publications.
2. Balouet J.C . & Olson S.L. 1989 Fossil birds from late Quaternary deposits in New Caledonia. Smithson. Contrib. Zool. 469. Washington: Smithsonian Institution Press.
3. Bregulla H.L. 1992 Birds of Vanuatu. Oswestry: Nelson.
4. Diamond J.M . 1984a Historic extinctions: a rosetta stone for understanding prehistoric extinctions. In Quaternary extinctions: a prehistoric revolution (ed. P. S. Martin & R. G. Klein) pp. 824-862. Tucson: University of Arizona Press.
5. Diamond J.M . 1984^ `Normal' extinctions of isolated populations. In Extinctions (ed. M. H. Nitecki) pp. 191-246. University of Chicago Press.
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