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The latitudinal gradient in recent speciation and extinction rates of birds and mammals.
Science. 2007 Mar 16; 315(5818):1574-6.Sci

Abstract

Although the tropics harbor greater numbers of species than do temperate zones, it is not known whether the rates of speciation and extinction also follow a latitudinal gradient. By sampling birds and mammals, we found that the distribution of the evolutionary ages of sister species-pairs of species in which each is the other's closest relative-adheres to a latitudinal gradient. The time to divergence for sister species is shorter at high latitudes and longer in the tropics. Birth-death models fitting these data estimate that the highest recent speciation and extinction rates occur at high latitudes and decline toward the tropics. These results conflict with the prevailing view that links high tropical diversity to elevated tropical speciation rates. Instead, our findings suggest that faster turnover at high latitudes contributes to the latitudinal diversity gradient.

Authors+Show Affiliations

Biodiversity Research Center and Department of Zoology, University of British Columbia, Vancouver, BC V6T 1Z4, Canada. weir@zoology.ubc.caNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.

Language

eng

PubMed ID

17363673

Citation

Weir, Jason T., and Dolph Schluter. "The Latitudinal Gradient in Recent Speciation and Extinction Rates of Birds and Mammals." Science (New York, N.Y.), vol. 315, no. 5818, 2007, pp. 1574-6.
Weir JT, Schluter D. The latitudinal gradient in recent speciation and extinction rates of birds and mammals. Science. 2007;315(5818):1574-6.
Weir, J. T., & Schluter, D. (2007). The latitudinal gradient in recent speciation and extinction rates of birds and mammals. Science (New York, N.Y.), 315(5818), 1574-6.
Weir JT, Schluter D. The Latitudinal Gradient in Recent Speciation and Extinction Rates of Birds and Mammals. Science. 2007 Mar 16;315(5818):1574-6. PubMed PMID: 17363673.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - The latitudinal gradient in recent speciation and extinction rates of birds and mammals. AU - Weir,Jason T, AU - Schluter,Dolph, PY - 2007/3/17/pubmed PY - 2007/3/30/medline PY - 2007/3/17/entrez SP - 1574 EP - 6 JF - Science (New York, N.Y.) JO - Science VL - 315 IS - 5818 N2 - Although the tropics harbor greater numbers of species than do temperate zones, it is not known whether the rates of speciation and extinction also follow a latitudinal gradient. By sampling birds and mammals, we found that the distribution of the evolutionary ages of sister species-pairs of species in which each is the other's closest relative-adheres to a latitudinal gradient. The time to divergence for sister species is shorter at high latitudes and longer in the tropics. Birth-death models fitting these data estimate that the highest recent speciation and extinction rates occur at high latitudes and decline toward the tropics. These results conflict with the prevailing view that links high tropical diversity to elevated tropical speciation rates. Instead, our findings suggest that faster turnover at high latitudes contributes to the latitudinal diversity gradient. SN - 1095-9203 UR - https://www.unboundmedicine.com/medline/citation/17363673/The_latitudinal_gradient_in_recent_speciation_and_extinction_rates_of_birds_and_mammals_ L2 - http://www.sciencemag.org/cgi/pmidlookup?view=long&pmid=17363673 DB - PRIME DP - Unbound Medicine ER -