Evolution in the hypervariable environment of Madagascar.
We show that the diverse ecoregions of Madagascar share one distinctive climatic feature: unpredictable intra- or interannual precipitation compared with other regions with comparable rainfall. Climatic unpredictability is associated with unpredictable patterns of fruiting and flowering. It is argued that these features have shaped the evolution of distinctive characteristics in the mammalian fauna of the island. Endemic Herpestidae and Tenrecidae and members of five endemic primate families differ from closely related species elsewhere, exhibiting extremes of "fastness" and "slowness" in their life histories. Climatic features may also account for the dearth of frugivorous birds and mammals in Madagascar, and for the evolutionary prevalence of species with large body mass.
Dewar
Robert E
RE
McDonald Institute of Archaeological Research, University of Cambridge, Downing Street, Cambridge CB2 3ER, England. red30@cam.ac.uk
Richard
Alison F
AF
D000818:Animals; D005075:Biological Evolution; D004777:Environment; D008270:Madagascar; D008322:Mammals; D011891:Rain; D013997:Time Factors
Am J Phys Anthropol. 1999;Suppl 29:31-72
10601983
Am J Phys Anthropol. 2003 Feb;120(2):182-94
12541335
Nature. 2003 Feb 13;421(6924):734-7
12610623
Am J Primatol. 1997;41(3):195-211
9057965
Science. 1990 Jul 20;249(4966):306-7
17750115