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Reliable Method for Assessing Seed Germination, Dormancy, and Mortality under Field Conditions
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Generalized provisional seed zones for native plants.

Andrew D Bower, J Bradley St Clair, Vicky Erickson

    Ecological Applications : a Publication of the Ecological Society of America
    |August 27, 2014
    PubMed
    Summary

    Restoration projects need adapted plants. New provisional seed zones, based on climate data, guide seed movement across the U.S. to minimize maladaptation and improve restoration success.

    Area of Science:

    • Ecological restoration
    • Conservation biology
    • Plant genetics

    Background:

    • Successful restoration relies on using well-adapted, ecologically appropriate plant materials.
    • Guiding seed movement is crucial for minimizing maladaptation in restoration projects.

    Purpose of the Study:

    • To develop generalized provisional seed zones for the United States to guide seed movement.
    • To provide a framework for minimizing maladaptation in restoration by using climate-based seed zones.

    Main Methods:

    • Delineated 64 provisional seed zones across the continental U.S. using high-resolution climatic data (winter minimum temperature and annual heat:moisture index).
    • Integrated Omernik's level III ecoregions with provisional seed zones to identify climatically similar yet ecologically distinct areas.

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  • Quantitatively compared provisional seed zones, ecoregions, and provisional seed zones within ecoregions for three species.

    • Main Results:

    • Provisional seed zones were delineated based on climatic similarity, aiming to minimize maladaptation.
    • Combining provisional seed zones with ecoregions highlighted areas with climatic similarity but ecological differences.
    • Provisional seed zones within ecoregions often explained the most variation in plant fitness-related traits.

    Conclusions:

    • The developed provisional seed zones offer a starting point for seed transfer guidelines in the U.S.
    • These zones should be used alongside species-specific data and local knowledge for effective restoration.
    • Integrating climate-based seed zones with ecological regions can enhance restoration outcomes.