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    Author(s): Don C. BraggJames M. Guldin
    Date: 2003
    Source: In: Van Sambeek, J.W.; Dawson, J.O.; Ponder, F., Jr.; Loewenstein, E.F.; Fralish, J.S., eds. 2003. Proceedings, 13th Central Hardwood Forest conference; 2002 April 1-3; Urbana, IL. Gen. Tech. Rep. NC-234. St. Paul, MN: U.S. Department of Agriculture, Forest Service, North Central Research Station. 565 p. [Peer-reviewed paper from oral presentation].
    Publication Series: Miscellaneous Publication
    PDF: View PDF  (138 KB)

    Description

    Optimal growth equations are fundamental to many ecological simulators, but few have been critically examined. This paper reviews some of the behavior of the Potential Relative Increment (PRI) approach. Models for white oak were compared for Arkansas River Valley (ARV), Boston Mountains (BoM), Ouachita Mountains (OM), and Ozark Highlands (OH) ecological sections of the Interior Highlands. Noticeable divergence in equation shape was observed in the section and pooled models. PRI curves for the ARV and OM models predicted poor optimal growth, especially in the smallest size classes. The OH equation predicted high juvenile performance but limited large tree optima while the BoM model peaked at intermediate diameters. These distinctions may arise from differences in physiological potential between sections, or, more likely, from inadequate sample distributions. Our study supports pooling to improve optimal growth modeling if phenotypic conditions do not vary substantially.

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    Citation

    Bragg, Don C.; Guldin, James M. 2003. Differences in Optimal Growth Equations For White Oak in the Interior Highlands. In: Van Sambeek, J.W.; Dawson, J.O.; Ponder, F., Jr.; Loewenstein, E.F.; Fralish, J.S., eds. 2003. Proceedings, 13th Central Hardwood Forest conference; 2002 April 1-3; Urbana, IL. Gen. Tech. Rep. NC-234. St. Paul, MN: U.S. Department of Agriculture, Forest Service, North Central Research Station. 565 p. [Peer-reviewed paper from oral presentation].

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