Plant species' origin predicts dominance and response to nutrient enrichment and herbivores in global grasslands.

Published online

Journal Article

Exotic species dominate many communities; however the functional significance of species' biogeographic origin remains highly contentious. This debate is fuelled in part by the lack of globally replicated, systematic data assessing the relationship between species provenance, function and response to perturbations. We examined the abundance of native and exotic plant species at 64 grasslands in 13 countries, and at a subset of the sites we experimentally tested native and exotic species responses to two fundamental drivers of invasion, mineral nutrient supplies and vertebrate herbivory. Exotic species are six times more likely to dominate communities than native species. Furthermore, while experimental nutrient addition increases the cover and richness of exotic species, nutrients decrease native diversity and cover. Native and exotic species also differ in their response to vertebrate consumer exclusion. These results suggest that species origin has functional significance, and that eutrophication will lead to increased exotic dominance in grasslands.

Full Text

Duke Authors

Cited Authors

  • Seabloom, EW; Borer, ET; Buckley, YM; Cleland, EE; Davies, KF; Firn, J; Harpole, WS; Hautier, Y; Lind, EM; MacDougall, AS; Orrock, JL; Prober, SM; Adler, PB; Anderson, TM; Bakker, JD; Biederman, LA; Blumenthal, DM; Brown, CS; Brudvig, LA; Cadotte, M; Chu, C; Cottingham, KL; Crawley, MJ; Damschen, EI; Dantonio, CM; DeCrappeo, NM; Du, G; Fay, PA; Frater, P; Gruner, DS; Hagenah, N; Hector, A; Hillebrand, H; Hofmockel, KS; Humphries, HC; Jin, VL; Kay, A; Kirkman, KP; Klein, JA; Knops, JMH; La Pierre, KJ; Ladwig, L; Lambrinos, JG; Li, Q; Li, W; Marushia, R; McCulley, RL; Melbourne, BA; Mitchell, CE; Moore, JL; Morgan, J; Mortensen, B; O'Halloran, LR; Pyke, DA; Risch, AC; Sankaran, M; Schuetz, M; Simonsen, A; Smith, MD; Stevens, CJ; Sullivan, L; Wolkovich, E; Wragg, PD; Wright, J; Yang, L

Published Date

  • July 15, 2015

Published In

Volume / Issue

  • 6 /

Start / End Page

  • 7710 -

PubMed ID

  • 26173623

Pubmed Central ID

  • 26173623

Electronic International Standard Serial Number (EISSN)

  • 2041-1723

Digital Object Identifier (DOI)

  • 10.1038/ncomms8710

Language

  • eng

Conference Location

  • England