title: Asian primate species richness correlates with rainfall.
abstract: Previous studies of meta-analyses found significantly positive correlations between primate species richness and rainfall for Africa, Madagascar and the Neotropics, with the exception of Asia, leaving the open question whether that anomaly is the result of sampling bias, biogeography, or some other factor. This study re-examines the question using modelled data, with primate species richness data from the Southeast Asian Mammals Databank and rainfall data from the Climatic Research Unit. Data processing with Geographical Information Systems resulted in 390 sample points. Reduced major axis and ordinary least squares regressions were employed to examine the relationship for six regions, including the whole study area of Southeast Asia, and the subareas of Huxley West, Huxley East, Mainland Southeast Asia, Borneo, and Sumatra. The results showed a significant positive relationship between primate species richness and mean annual rainfall for Southeast Asia (r = 0.26, P<0.001). Comparing the results for the large islands and Mainland Southeast Asia showed that Sumatra had the highest correlation (r = 0.58; P<0.05). After controlling for the major biogeographic effect associated with Huxley's Line, our results showed that primate species richness is positively associated with mean annual rainfall in Southeast Asia. Our findings contrast to prior studies of meta-analyses that showed no relationship between rainfall and primate species richness in Asia, and thereby bring Asia into agreement with results showing significant positive correlations between rainfall and primate species richness everywhere else in the world. The inference is that previous anomalous results for Asia were result of sampling bias in the meta-analysis.
authors: Department of Geography, National University of Singapore, Singapore, Singapore.
authors: Yi-Chen
authors: YC
authors: Wang
authors: Amrita
authors: A
authors: Srivathsan
authors: Chen-Chieh
authors: CC
authors: Feng
authors: Agus
authors: A
authors: Salim
authors: Myron
authors: M
authors: Shekelle
mesh_terms: D000818:Animals; D001210:Asia, Southeastern; D044822:Biodiversity; D062312:Islands; D011323:Primates / Q000145:classification*; D011891:Rain; D062206:Spatial Analysis
references: Am J Phys Anthropol. 2004;Suppl 39:2-39
references: 15605389
references: Proc Natl Acad Sci U S A. 1997 Nov 25;94(24):13023-7
references: 9371793
references: Science. 2012 Mar 23;335(6075):1441; author reply 1441
references: 22442464
references: Am Nat. 2003 Jan;161(1):83-97
references: 12650464
references: Ecology. 2010 Sep;91(9):2522-33
references: 20957942
references: Am J Phys Anthropol. 2009 Nov;140(3):476-86
references: 19425097
references: Nature. 2002 Mar 28;416(6879):427-30
references: 11919631
references: Proc Natl Acad Sci U S A. 1995 Aug 15;92(17):7874-6
references: 7644506
references: Science. 2011 Sep 23;333(6050):1750-3
references: 21940895
references: Oecologia. 1984 Jan;61(1):11-17
references: 28311380
references: Ecol Lett. 2012 Nov;15(11):1318-1325
references: 22909289
references: Ecol Lett. 2009 Sep;12(9):873-86
references: 19702748
references: Ecology. 2006 Oct;87(10):2468-78
references: 17089656
references: Proc Biol Sci. 2009 Jan 7;276(1654):21-30
references: 18796398
references: Proc Biol Sci. 2006 Sep 22;273(1599):2283-9
references: 16928629
references: PLoS Biol. 2012 Aug;10(8):e1001381
references: 22969411