Appendix A. Supplementary analysis of the relationships among mean annual precipitation, nitrogen deposition, and species richness at our focal sites. E. ClelandElsa L. CollinsScott L. DicksonTimothy FarrerEmily C. L. GrossKatherine GherardiLaureano A. M. HallettLauren J. HobbsRichard HsuJoanna S. TurnbullLaura N. SudingKatharine 2016 Supplementary analysis of the relationships among mean annual precipitation, nitrogen deposition, and species richness at our focal sites.