ENVIRONMENTAL SCIENCES Correction to Supporting Information for “Spatially robust estimates of biological nitrogen (N) fixation imply substantial human alteration of the tropical N cycle,” by Benjamin W. Sullivan, W. Kolby Smith, Alan R. Townsend, Megan K. Nasto, Sasha C. Reed, Robin L. Chazdon, and Cory C. Cleveland, which appeared in issue 22, June 3, 2014, of Proc Natl Acad Sci USA (111:8101–8106; first published May 19, 2014; 10.1073/pnas.1320646111).
The authors note Fig. S2 appeared incorrectly. The SI has been corrected online.
Fig. S2.
Distribution of legume basal area and legume abundance (both in absolute values and percent) in 5 Center for Tropical Forest Science (CTFS) plots located around the world (Table 1) and 12 secondary and primary forest plots on the Osa Peninsula, Costa Rica.