. CLIMACS : a computer model of forest stand development for western Oregon and Washington. Forests and forestry Oregon Data processing; Forests and forestry Washington (State) Data processing. Regeneration depends on the projected leaf area of any existing trees. During the first year any available species can regenerate. Thereafter if the projected leaf area is greater than 3 m2/m2 (square meter of leaf area per square meter of ground), Pinus contorta Dougl. ex Loud., P. ponderosa Dougl. ex Laws., and Quercus garryana Dougl. ex Hook, cannot regenerate. If the projected leaf area is greater t
. CLIMACS : a computer model of forest stand development for western Oregon and Washington. Forests and forestry Oregon Data processing; Forests and forestry Washington (State) Data processing. Regeneration depends on the projected leaf area of any existing trees. During the first year any available species can regenerate. Thereafter if the projected leaf area is greater than 3 m2/m2 (square meter of leaf area per square meter of ground), Pinus contorta Dougl. ex Loud., P. ponderosa Dougl. ex Laws., and Quercus garryana Dougl. ex Hook, cannot regenerate. If the projected leaf area is greater than 6 m2/m2, then Abies procera Rehd., Alnus rubra Bong., Arbutus men- ziesii Pursh, Castanopsis chrysophylla (Dougl.) A. DC, Picea engelmannii Parry ex Engelm., and Pseudotsuga menziesii cannot appear in the plot. For a projected leaf area exceeding 8 m2/m2 Abies grandis (Dougl. ex D. Don) Lindl.), A. lasio- carpa (Hook.) Nutt., Acer macrophyllum Pursh, Picea sitchensis (Bong.) Carr., Pinus lambertiana Dougl., and P. monticola Dougl. ex D. Don cannot appear. If the projected leaf area exceeds 10 m2/m2, Libocedrus decurrens Torr., Chamae- cyparis nootkatensis (D. Don) Spach, Thuja plicata Donn ex D. Don, and Tsuga mertensiana (Bong.) Carr. cannot regenerate. At leaf areas exceeding 10 m2/m2 only the most shade tolerant species, Abies amabilis Dougl. ex Forbes and Tsuga heterophylla (Raf.) Sarg., can regenerate. The trees appear in the plot when they are between 10 and 15 cm This limit on size is necessary because num- bers of smaller seedlings become so large that computer time is prohibitive, and the abundance of very small seedlings may not reflect the composition of an understory that could replace large-canopy trees. The projected leaf area (XLAI) (in m2/m2) is based on foliage biomass (FB10) of all trees on the plot. The equations for the foliage biomass of trees less than 50 cm ( in) in diameter are from Binkely (1983) for Alnus rubra and from Gholz and others
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Keywords: ., bo, bookcentury1900, bookcollectionbiodiversity, bookleafnumber17
