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    Author(s): Paul G. Schaberg; Gary J. Hawley; Donald H. DeHayes; Samuel E. Nijensohn
    Date: 2004
    Source: In: Beaulieu, J., ed. Silviculture and the conservation of genetic resources for sustainable forest management, proceedings of the symposium of the North American forest commission, forest genetic resources and silviculture working groups, and the International Union of Forest Research Organizations (IUFRO); 2003 September 21; Quebec City, Canada. Natural Resources Canada, Canadian Forest Service: 67-74.
    Publication Series: Other
    Station: Northern Research Station
    PDF: View PDF  (2.96 MB)

    Description

    Because rare alleles provide a means for adaptation to environmental change they are often considered important to long-term forest health. Through the selective removal of trees (and genes), silvicultural management may alter the genetic structure of forests, with rare alleles perhaps being uniquely vulnerable to manipulation due to their low frequencies or associations between rare alleles and harvest selection criteria. We tested this possibility in two ways. First we evaluated the influence of long-term management on the genetics of an eastern hemlock (Tsuga canadensis (L.) Carr.) forest within the Penobscot Experimental Forest in Maine. Plots received one of three treatments: 1) a selection cut in which small and poor form trees were preferentially removed in 1957 and 1977, 2) a diameter limit cut in which the largest trees in each diameter class were removed in 1952, 1973 and 1994, and 3) an unmanaged control.

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    Citation

    Schaberg, Paul G.; Hawley, Gary J.; DeHayes, Donald H.; Nijensohn, Samuel E. 2003. Silvicultural management and the manipulation of rare alleles. In: Beaulieu, J., ed. Silviculture and the conservation of genetic resources for sustainable forest management, proceedings of the symposium of the North American forest commission, forest genetic resources and silviculture working groups, and the International Union of Forest Research Organizations (IUFRO); 2003 September 21; Quebec City, Canada. Natural Resources Canada, Canadian Forest Service: 67-74.

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