Biological Invasions

, Volume 14, Issue 3, pp 693–699 | Cite as

Levels of novel hybridization in the saltcedar invasion compared over seven decades

  • John F. Gaskin
  • Adam S. Birken
  • David J. Cooper
Original Paper
First Online:
Received:
Accepted:

Abstract

Hybridization is proposed as one process that can enhance a plant species’ invasive ability. We quantified the levels of hybridization of 180 saltcedar plants (Tamarix spp.) of varying ages that span the history of an invasion along the Green River, Utah, USA. Plants ranging in establishment dates from 1930s to 2004 were analyzed using Amplified Fragment Length Polymorphisms. All plants sampled, even those established before the Green River saltcedars were numerous, were assigned as hybrids, not as parental types that are still found in more extreme southern and northern latitudes in the USA. Our collections either did not capture the earliest parental types, parental types have failed to persist, or the first introductions to the Green River were already hybrids. In any case, it appears that hybrids have been a dominant part of this local invasion history, from establishment through invasion spread stages.

Keywords

Saltcedar Tamarix Hybridization Invasion 
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Notes

Acknowledgments

We thank GeorgeYatskievych, and others for donating Asian plant samples, and Kim Mann and Jeannie Lassey for AFLP analysis in the laboratory. This research was made possible through funding from the National Geographic Society Committee for Research and Exploration Grant # 6663-99, the Bureau of Land Management (Utah, Montana, South and North Dakota) and U.S. Department of Agriculture National Research Initiative Competitive Grants Program, Cooperative State Research, Education, and Extension Service Grant 2000-00836. Funding for the collection of Green River plant samples was provided by the U.S. Bureau of Reclamation, Upper Colorado River Regional Office.

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Copyright information

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

Authors and Affiliations

  • John F. Gaskin
    • 1
  • Adam S. Birken
    • 2
    • 3
    • 4
  • David J. Cooper
    • 2
    • 3
  1. 1.USDA Agricultural Research ServiceSidneyUSA
  2. 2.Department of Forest, Rangeland, and Watershed StewardshipColorado State UniversityFort CollinsUSA
  3. 3.Graduate Degree Program in EcologyColorado State UniversityFort CollinsUSA
  4. 4.USDA Natural Resources Conservation ServiceBoiseUSA

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