Technical Comments

Comment on "Computational Improvements Reveal Great Bacterial Diversity and High Metal Toxicity in Soil"

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Science  18 Aug 2006:
Vol. 313, Issue 5789, pp. 918
DOI: 10.1126/science.1126593

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Gans et al. (Reports, 26 August 2005, p. 1387) provided an estimate of soil bacterial species richness two orders of magnitude greater than previously reported values. Using a re-derived mathematical model, we reanalyzed the data and found that the statistical error exceeds the estimate by a factor of 26. We also note two potential sources of error in the experimental data collection and measurement procedures.

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