Comment on "The Latitudinal Gradient in Recent Speciation and Extinction Rates of Birds and Mammals"

Author:

Tobias Joseph A.12,Bates John M.12,Hackett Shannon J.12,Seddon Nathalie12

Affiliation:

1. Edward Grey Institute, Department of Zoology, University of Oxford, Oxford OX1 3PS, UK.

2. Department of Zoology, The Field Museum, Chicago, IL 60605–2496, USA.

Abstract

Weir and Schluter (Reports, 16 March 2007, p. 1574) used variation in the age distribution of sister species to estimate that recent rates of speciation decline toward the tropics. However, this conclusion may be undermined by taxonomic biases, sampling artifacts, and the sister-species method, all of which tend to underestimate diversification rates at low latitudes.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

Reference28 articles.

1. The Latitudinal Gradient in Recent Speciation and Extinction Rates of Birds and Mammals

2. TESTING FOR LATITUDINAL BIAS IN DIVERSIFICATION RATES: AN EXAMPLE USING NEW WORLD BIRDS

3. GLOBAL VARIATION IN THE DIVERSIFICATION RATE OF PASSERINE BIRDS

4. Complex phylogeographic structure has been reported in several Neotropical “species ” including Glyphorhynchus spirurus ( 14 ) Lepidothrix coronata ( 15 ) and Buarremon torquatus ( 16 ). Numerous tropical “species ” including many in Weir and Schluter's data set (e.g. Cnemotriccus fuscatus Grallaria rufula Xiphorhynchus ocellatus and Sittasomus griseicapillus ) are thought to represent 2 to 10 species-level taxa.

5. M. L. Isler, P. R. Isler, B. M. Whitney, Auk124, 11 (2007).

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