ECOLOGY Correction for “Natural and anthropogenic drivers of calcium depletion in a northern forest during the last millennium,” by Bérangère A. Leys, Gene E. Likens, Chris E. Johnson, Joseph M. Craine, Brice Lacroix, and Kendra K. McLauchlan, which appeared in issue 25, June 21, 2016, of Proc Natl Acad Sci USA (113:6934–6938; first published June 13, 2016; 10.1073/pnas.1604909113).
The authors note that the author contributions footnote appeared incorrectly. Gene E. Likens, Chris E. Johnson, and Joseph M. Craine should each be credited with analyzing data and writing the paper; Brice Lacroix should be credited with contributing new reagents/analytic tools and writing the paper; and Kendra K. McLauchlan should be credited with designing research, performing research, analyzing data, and writing the paper. The corrected author contributions footnote appears below.
Author contributions: K.K.M. and B.A.L. designed research; K.K.M. and B.A.L. performed research; B.A.L. and B.L. contributed new reagents/analytic tools; K.K.M., B.A.L., G.E.L., C.E.J., J.M.C., and B.L. analyzed data; and B.A.L., G.E.L., C.E.J., J.M.C., B.L., and K.K.M. wrote the paper.