Technical Comments

Response to Comment on “Dispersal Limitations Matter for Microbial Morphospecies”

Science  25 May 2007:
Vol. 316, Issue 5828, pp. 1124c
DOI: 10.1126/science.1137697

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Pither argues that the relationship we found between regional species-richness maxima and modal lake pH is expected because both values are constrained by the regional pH range and therefore cannot be interpreted as a signal of regional metacommunity dynamics. However, the null model he uses sets inappropriate parameters, generating unrealistic simulated data. We confirm our previous conclusions using a more appropriate null model.

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