George Livingston
Section of Integrative Biology
University of Texas at Austin
1 University Station C0930
Austin, TX 78712, USA
E-mail: glivingston@utexas.edu

Yuexin Jiang
Section of Integrative Biology
University of Texas at Austin
1 University Station C0930
Austin, TX 78712, USA
E-mail: yjiang@utexas.edu

Jeremy W. Fox
Dept. of Biological Sciences
University of Calgary
2500 University Dr. NW
Calgary, AB T2L 1Z3, Canada
E-mail: jefox@ucalgary.ca

Mathew A. Leibold
Section of Integrative Biology
University of Texas at Austin
1 University Station C0930
Austin, TX 78712, USA
E-mail: mleibold@austin.utexas.edu

R_script_simulation.r (MD5: 3b20e3f347a136eb3c3470bbb57101b1)

The supplement is a script (R_script_simulation.r) demonstrating the implementation of our simulations and subsequent analysis of asymmetry. The simulation method we utilized is nonparametric and user-defined. For this reason we have included the script. As described in the methods section of our associated manuscript, the simulation involves imposing species extinctions in our post-mixing communities and using the output as a null model against which we compare our observed results. The script includes annotations describing the function of each section of code.