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ECOLOGY Correction for “Rapid responses of soil microorganisms improve plant fitness in novel environments,” by Jennifer A. Lau and Jay T. Lennon, which was first published August 13, 2012; 10.1073/pnas.1202319109 ( Proc. Natl. Acad. Sci. U.S.A. 109 , 14058–14062). The authors wish to note the following: “We discovered an error in the plant trait and fitness dataset used in this publication. The error occurred in a column of data corresponding to a random effect (plant mesocosm) that was never statistically significant in any of the analyses. Correcting this error did not alter any of the primary conclusions of the manuscript; we still detect strong effects of microbe evolutionary history on plant fitness responses to drought, and results presented in all figures remain correct. In most cases, correcting the error did not qualitatively change any results and typically increased confidence in our findings (reducing p-values). However, in two cases a …

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