Tobias Joseph A, Bates John M, Hackett Shannon J, Seddon Nathalie
Edward Grey Institute, Department of Zoology, University of Oxford, Oxford OX1 3PS, UK.
Science. 2008 Feb 15;319(5865):901; author reply 901. doi: 10.1126/science.1150568.
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.
韦尔和施卢特（《科学》杂志报告，2007年3月16日，第1574页）利用姊妹物种年龄分布的差异估计，近期物种形成速率朝着热带地区下降。然而，这一结论可能会受到分类学偏差、抽样假象以及姊妹物种方法的影响，所有这些因素往往都会低估低纬度地区的物种多样化速率。
