Step 3: Resource availability and resident diversity across treatments
We calculated paired Pearson’s correlation coefficients between treatments (excluding invader type), resources (soil nitrate, soil moisture, light at ground level) and resident community (diversity, richness, total cover). We focus on conditions in 2013 as these would have affected invasion, whereas conditions in 2014 and 2015 would also reflect effects of invasion, complicating likely causal relationships.
All analysis was completed using R version 3.6.3 (R Core Team 2020) and JAGS version 4.3.0 (Plummer 2003). Appendix S2 includes additional details.