1. Adler PB, Fajardo A, Kleinhesselink AR, Kraft NJB (2013) Trait-based tests of coexistence mechanisms. Ecol Lett 16:1294–1306
2. Alpert P, Bone E, Holzapfel C (2000) Invasiveness, invasibility and the role of environmental stress in the spread of non-native plants. Perspect Plant Ecol Evol Syst 3:52–66
3. Bates D and Maechler M (2009) lme4: Linear mixed-effects models using S4 classes. R package version 0.999375-31. http://CRAN.R-project.org/package=lme4
4. Bivand R, Lewin-Koh N, Pebesma E, Archer E, Baddeley A, Bibiko H-J, Brey S, Callahan J, Carrillo G, Dray S, Forrest D, Friendly M, Giraudoux P, Golicher D, Gómez Rubio V, Hausmann P, Hufthammer KO, Jagger T, Luque S, MacQueen D, Niccolai A, Lamigueiro OP, Short T, Snow G, Stabler B, Stokely M, Turner R (2015) Maptools: tools for reading and handling spatial objects. R package version 0.8–10. http://r-forge.r-project.org/projects/maptools/
5. Chabrerie O, Loinard J, Perrin S, Saguez R, Decocq G (2010) Impact of Prunus serotina invasion on understory functional diversity in a European temperate forest. Biol Invasions 12:1891–1907