Combined modelling of distribution and niche in invasion biology: A case study of two invasive Tetramorium ant species

Florian M. Steiner, Birgit C. Schlick-Steiner, Jeremy Vanderwal, Keefe D. Reuther, Erhard Christian, Christian Stauffer, Andrew V. Suarez, Stephen E. Williams, Ross H. Crozier

Research output: Contribution to journalArticlepeer-review


Spatial modelling of species distributions has become an important tool in the study of biological invasions. Here, we examine the utility of combining distribution and ecological niche modelling for retrieving information on invasion processes, based on species occurrence data from native and introduced ranges. Specifically, we discuss questions, concerning (1) the global potential to spread to other ranges, (2) the potential to spread within established invasions, (3) the detectability of niche differences across ranges, and (4) the ability to infer invasion history through data from the introduced range. We apply this approach to two congeneric pavement ants, Tetramorium sp.E (formerly T. caespitum (Linnaeus 1758)) and T. tsushimae Emery 1925, both introduced to North America. We identify (1) the potential of both species to inhabit ranges worldwide, and (2) the potential of T. sp.E and T. tsushimae, to spread to 23 additional US states and to five provinces of Canada, and to 24 additional US states and to one province of Canada, respectively. We confirm that (3) niche modelling can be an effective tool to detect niche shifts, identifying an increased width of T. sp.E and a decreased width of T. tsushimae following introduction, with potential changes in niche position for both species. We make feasible that (4) combined modelling could become an auxiliary tool to reconstruct invasion history, hypothesizing admixture following multiple introductions in North America for T. sp.E, and a single introduction to North America from central Japan, for T. tsushimae. Combined modelling represents a rapid means to formulate testable explanatory hypotheses on invasion patterns and helps approach a standard in predictive invasion research.

Original languageEnglish (US)
Pages (from-to)538-545
Number of pages8
JournalDiversity and Distributions
Issue number3
StatePublished - May 2008


  • Biological invasions
  • Distribution modelling
  • Ecological niche modelling
  • Invasion history
  • Niche shift
  • Spread of invasion

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics


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