Supplement 1. Information on studies used in the meta-analysis.

File List MorrisEtAl_supplement.csv Description MorrisEtAl_supplement.csv is a comma-delimited text file that shows all of the unique agent pairs (e.g., the "Different Agents" column of Appendix A) and provides additional detailed information on all of the studies used in the meta-analysis. The following table describes the variables in the file: -- TABLE: Please see in attached file. -- Here are several additional notes relating to data collection. Plant performance measures included measures of size and measures of sexual reproduction. Only four studies included both types of measure. In those cases, for mainly clonally reproducing plants, we chose the measure of size, and otherwise used the sexual reproduction measure. When multiple measures of the same type (either size or reproduction) were presented in a study, we chose the one that best represented plant performance (e.g., total biomass over belowground biomass). We recovered numerical data from graphics using the program ImageJ: Abramoff, M. D., P. J. Magelhaes, and S. J. Ram. 2004. Image Processing with ImageJ. Biophotonics International 11:36–42.