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Abundance of introduced species at home predicts abundance away in herbaceous communities

Research output: Contribution to Journal/MagazineJournal articlepeer-review

  • J. Firn
  • J.L. Moore
  • A.S. MacDougall
  • E.T. Borer
  • E. Seabloom
  • J. HilleRisLambers
  • W.S. Harpole
  • E.E. Cleland
  • C.S. Brown
  • J.M.H. Knops
  • S. Prober
  • D.A. Pyke
  • K.A. Farrell
  • J. Bakker
  • L.R. O’Halloran
  • P.B. Adler
  • S.L. Collins
  • C.M. D’Antonio
  • M. J. Crawley
  • E.M. Wolkovich
  • K.J. La Pierre
  • B.A. Melbourne
  • Y. Hautier
  • J.W. Morgan
  • A.B.D. Leakey
  • A. Kay
  • R. McCulley
  • K Davies
  • C.J. Chu
  • K.D. Holl
  • J.A. Klein
  • P.A. Fay
  • N. Hagenah
  • K.P. Kirkham
  • Y. Buckley
<mark>Journal publication date</mark>03/2011
<mark>Journal</mark>Ecology Letters
Issue number3
Number of pages8
Pages (from-to)274-281
Publication StatusPublished
<mark>Original language</mark>English


Many ecosystems worldwide are dominated by introduced plant species, leading to loss of biodiversity and ecosystem function. A common but rarely tested assumption is that these plants are more abundant in introduced vs. native communities, because ecological or evolutionary-based shifts in populations underlie invasion success. Here, data for 26 herbaceous species at 39 sites, within eight countries, revealed that species abundances were similar at native (home) and introduced (away) sites – grass species were generally abundant home and away, while forbs were low in abundance, but more abundant at home. Sites with six or more of these species had similar community abundance hierarchies, suggesting that suites of introduced species are assembling similarly on different continents. Overall, we found that substantial changes to populations are not necessarily a pre-condition for invasion success and that increases in species abundance are unusual. Instead, abundance at home predicts abundance away, a potentially useful additional criterion for biosecurity programmes.