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    Author(s): Brian Wing; Kevin Boston; Martin W. Ritchie
    Date: 2019
    Source: Forest Science. 65(2): 211-222
    Publication Series: Scientific Journal (JRNL)
    Station: Pacific Southwest Research Station
    PDF: Download Publication  (562.0 KB)

    Description

    Group-selection silviculture has many benefcial attributes and has increased in application over the past 30 years. One diffculty with group-selection implementation is the designation of group openings within a stand to achieve a variety of complex management goals. This study presents a new method for utilizing geospatial census stem map data derived from airborne lidar in a heuristic environment to generate and select from treatment solutions that best meet management objectives in an effcient manner. The method successfully generated candidate treatment solutions over two entries that met a set of tree size, opening size and spacing constraints. The heuristic was implemented on two separate ponderosa pine stands with similar stand conditions using different group-selection opening sizes. Successful feld implementations relied on a tree-marking technique developed in this study that relied on high-precision GPS receivers. The heuristic identifed good solutions, but the quality is unknown as this is a large nonlinear optimization problem. Nonetheless, this study provides an innovative, effcient and mathematically defendable alternative for implementing group-selection treatments in stands where accurate geospatially-referenced census can be obtained.

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    Citation

    Wing, Brian M; Boston, Kevin; Ritchie, Martin W. 2018. A technique for implementing group selection treatments with multiple objectives using an airborne lidar-derived stem map in a heuristic environment. Forest Science. 65(2): 211-222. https://doi.org/10.1093/forsci/fxy050.

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    Keywords

    group selection, heuristic, airborne lidar, individual tree detection, census stem map

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