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Related Experiment Videos

Delayed population explosion of an introduced butterfly.

Carol L Boggs1, Cheryl E Holdren, Ipek G Kulahci

  • 1Rocky Mountain Biological Laboratory, Crested Butte, CO, USA. cboggs@stanford.edu

The Journal of Animal Ecology
|April 28, 2006
PubMed
Summary
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Introduced Euphydryas gillettii populations can exhibit lagged expansions, with a Colorado population showing a surge and contraction. This metapopulation dynamic may lead to satellite populations and punctuated range growth.

Area of Science:

  • Ecology
  • Invasive Species Biology
  • Population Dynamics

Background:

  • Lagged population and range expansions in introduced species are poorly understood.
  • Detailed case studies on introduced species dynamics are scarce.

Purpose of the Study:

  • To document the 29-year population dynamics and structure of an introduced Euphydryas gillettii population.
  • To investigate the causes of lagged expansions in introduced species.

Main Methods:

  • Long-term monitoring of population size and habitat use.
  • Analysis of population structure and spatial distribution over 29 years.
  • Assessment of metapopulation dynamics and habitat patch occupancy.

Main Results:

Related Experiment Videos

  • The introduced Euphydryas gillettii population remained small and localized for 21 years.
  • A dramatic population surge and range expansion occurred by 2002, followed by a contraction to three core habitat patches.
  • Independent population dynamics within patches suggested metapopulation behavior.

    • Conclusions:

    • The observed surge and contraction pattern, characteristic of metapopulations, can lead to lagged or punctuated expansions.
    • Establishment of satellite populations is a potential outcome of this dynamic.
    • Habitat structure may influence the success of lagged expansions in introduced species.