Results of t-tests for the numbers of rare snail species and individuals.

Results of t-tests for the numbers of rare snail species and individuals, analyzed by generalized linear mixed models with plot invasion status (invaded/non-invaded) and invading plant species (Fallopia sachalinensis, F. japonica, F.×bohemica and Impatiens glandulifera) as fixed effects and sites with paired invaded/non-invaded plots as random intercepts. Rare species were analyzed using the function glmmPQL and rare individuals using lmer in R [94]. Results were obtained by the function summary and show fixed effects based on treatment contrasts where the intercept is for the plot invasion status ‘non-invaded’ and invading plant species F.×bohemica. Significant invasion status×plant species interactions are in bold.Results of t-tests for the numbers of rare snail species and individuals.