Distributions of exotic plants in eastern Asia and North America

Authors

  • Qinfeng Guo,

    Corresponding author
    1. U.S. Geological Survey, Northern Prairie WRC, 8711 37th St. SE, Jamestown, ND 58401, USA
    Search for more papers by this author
    • These authors contributed equally

  • Hong Qian,

    1. Research and Collections Center, Illinois State Museum, 1011 East Ash Street, Springfield, IL 62703, USA
    Search for more papers by this author
    • These authors contributed equally

  • Robert E. Ricklefs,

    1. Department of Biology, University of Missouri-St Louis, 8001 Natural Bridge Road, St Louis, MO 63121-4499, USA
    Search for more papers by this author
    • These authors contributed equally

  • Weimin Xi

    1. Department of Biology, University of North Carolina, Chapel Hill, NC 27599-3280, USA
    Search for more papers by this author
    • Present address: 406 Heep Center, The Knowledge Engineering Laboratory, Entomology Department, Texas A&M University, College Station TX 77840, USA


* E-mail: qguo@usgs.gov

Abstract

Although some plant traits have been linked to invasion success, the possible effects of regional factors, such as diversity, habitat suitability, and human activity are not well understood. Each of these mechanisms predicts a different pattern of distribution at the regional scale. Thus, where climate and soils are similar, predictions based on regional hypotheses for invasion success can be tested by comparisons of distributions in the source and receiving regions. Here, we analyse the native and alien geographic ranges of all 1567 plant species that have been introduced between eastern Asia and North America or have been introduced to both regions from elsewhere. The results reveal correlations between the spread of exotics and both the native species richness and transportation networks of recipient regions. This suggests that both species interactions and human-aided dispersal influence exotic distributions, although further work on the relative importance of these processes is needed.

Ancillary