ECOLOGY
Correction for “Biogeographic variation in evergreen conifer needle longevity and impacts on boreal forest carbon cycle projections,” by Peter B. Reich, Roy L. Rich, Ying-Ping Wang, and Jacek Oleksyn, which appeared in issue 38, September 23, 2014, of Proc Natl Acad Sci USA (111:13703–13708; first published September 15, 2014; 10.1073/pnas.1216054110).
The authors note that on page 13705, left column, second full paragraph, lines 11 and 12, “foliage and roots represent a greater and smaller fraction, respectively, of total biomass in forests in increasingly cold environments (26)” should instead appear as “foliage and roots represent a smaller and greater fraction, respectively, of total biomass in forests in increasingly cold environments (26).”