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Science 25 May 2007:
Vol. 316. no. 5828, p. 1124
DOI: 10.1126/science.1137525
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Technical Comments

Comment on "Dispersal Limitations Matter for Microbial Morphospecies"

Jason Pither

Telford et al. (Brevia, 19 May 2006, p. 1015) reported that freshwater diatoms exhibit regional-scale richness-pH relationships that depend substantially on regional habitat availability. On this basis, the authors argued that, despite their microscopic size, diatoms are not ubiquitously dispersed. Here, I describe my demonstration that their primary evidence against the ubiquitous dispersal hypothesis is spurious.

Department of Ecology and Evolutionary Biology, University of Arizona, BSW 310, 1041 East Lowell Street, Tucson, AZ 85721, USA.

E-mail: pitherj{at}email.arizona.edu. Address as of 1 July 2007: Biology and Physical Geography Unit, Irving K. Barber School of Arts and Sciences, University of British Columbia–Okanagan, 3333 University Way, Kelowna, BC, Canada V1V 1V7.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)