Alien and native species richness and abundance

The file contains all data used in the statistical analyses described in the materials and methods section of the article. "Port" = name of the fifteen surveyed sites; "Trap position" = environment where the traps were placed in each of the fifteen surveyed sites (forest vs port); "Alien species richness" = mean number of alien species trapped per trap check; "Alien species abundance" =mean number of alien individuals trapped per trap check; "Native species richness" = mean number of native species trapped per trap check; "Native species abundance" =mean number of native individuals trapped per trap check.