Biological Invasions

, Volume 14, Issue 3, pp 547–556

Latitudinal shifts of introduced species: possible causes and implications

Original Paper

Abstract

This study aims to document shifts in the latitudinal distributions of non-native species relative to their own native distributions and to discuss possible causes and implications of these shifts. We used published and newly compiled data on inter-continentally introduced birds, mammals and plants. We found strong correlations between the latitudinal distributions occupied by species in their native and exotic ranges. However, relatively more non-native species occur at latitudes higher than those in their native ranges, and fewer occur at latitudes lower than those in their native ranges. Only a small fraction of species examined (i.e. <20% of animals and <10% of plants) have expanded their distributions in their exotic range beyond both high- and low-limits of their native latitudes. Birds, mammals and plants tended to shift their exotic ranges in similar ways. In addition, most non-native species (65–85% in different groups) have not reached the distributional extent observed in their native ranges. The possible drivers of latitudinal shifts in the exotic range may include climate change, greater biotic resistance at lower latitudes, historical limitations on ranges in native regions, and the impacts of humans on species distributions. The relatively restricted distribution of most species in their exotic range highlights the great potential of future spread of most introduced species and calls for closely monitoring their directional spread under climate change.

Keywords

Climate change Invasion potential Land use Niche Risk assessment Species range 

Supplementary material

10530_2011_94_MOESM1_ESM.doc (834 kb)
Supplementary material 1 (DOC 834 kb)

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Copyright information

© Springer Science+Business Media B.V. (outside the USA) 2011

Authors and Affiliations

  • Qinfeng Guo
    • 1
  • Dov F. Sax
    • 2
  • Hong Qian
    • 3
  • Regan Early
    • 4
  1. 1.USDA FS, Eastern Forest Environmental Threat Assessment CenterAshevilleUSA
  2. 2.Ecology and Evolutionary BiologyBrown UniversityProvidenceUSA
  3. 3.Research and Collections Center, Illinois State MuseumSpringfieldUSA
  4. 4.Cátedra “Rui Nabeiro” BiodiversidadeUniversidade de ÉvoraÉvoraPortugal

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