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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.

Original publication

DOI

10.1126/science.1150568

Type

Journal article

Journal

Science

Publication Date

15/02/2008

Volume

319

Keywords

Animals, Biodiversity, Birds, Extinction, Biological, Genetic Speciation, Geography, Haplotypes, Mammals, Passeriformes, Phylogeny, Tropical Climate