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A Simple Migration/Invasion Workflow Using an Automated Live-cell Imager
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An assessment of invasion risk from assisted migration.

Jillian M Mueller1, Jessica J Hellmann

  • 1Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556, USA.

Conservation Biology : the Journal of the Society for Conservation Biology
|June 26, 2008
PubMed
Summary

Assisted migration (AM) may help species survive climate change but risks creating new invasive species. While intracontinental invasions are rare, they can be severe, especially for fish and crustaceans.

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Area of Science:

  • Ecology
  • Conservation Biology
  • Invasive Species Management

Background:

  • Climate change necessitates novel conservation strategies like assisted migration (AM).
  • AM involves human-aided translocation of species to suitable future climates.
  • A key concern is the potential for translocated species to become invasive.

Purpose of the Study:

  • To assess the risk of assisted migration creating new invasive species.
  • To compare the prevalence and impact of intracontinental versus intercontinental invasions.
  • To inform policy regarding the risks and benefits of AM.

Main Methods:

  • Surveyed invasive species in the United States.
  • Categorized invasive species by their origin (intracontinental vs. intercontinental).
  • Used intracontinental invaders as a proxy for species moved via AM.

Main Results:

  • Intracontinental invasions are less frequent than intercontinental ones.
  • Intracontinental invasions are equally likely to cause severe ecological or economic damage.
  • Fish and crustaceans represent a high risk for intracontinental invasion.

Conclusions:

  • The risk of AM creating novel invasive species is low.
  • However, successful introductions via AM could have significant negative impacts.
  • Lessons from species reintroduction programs can guide AM policy.