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<p>The strip shelterwood is a harvesting method that has shown promise in regenerating numerous tree species. Although the cut strips are often the focus for managers, the residual strips provide opportunities to cultivate advance regeneration due to increased light penetration from the sides. The increased understory light levels can develop oak advance regeneration which can be released after a period of 5–10&#xa0;years by harvesting the residual strips. Using calculations of solar position, we determined theoretical shade patterns in strip shelterwoods with three different combinations of residual and cut strip widths immediately following the initial harvest. Strip shelterwood combinations comprised 75-ft-wide (0.625 × tree height) residual and cut strips (H1), 150-ft-wide (1.25 × tree height) residual and cut strips (H2), and 75-ft-wide residual strips and 150-ft-wide cut strips (H3). Harvest H3 had the greatest average proportion of area receive light to the forest floor within residual strips, along strip edges, and within cut strips. Harvest H1 had a greater average proportion of area receive light to the forest floor in the center of residual strips than in harvest H2; however, H1 had less area receive light in all other positions of the strip pairings. Based on these understory light regimes, we concluded that harvest H1 or H3 would provide a better understory light regime for oak seedling development within residual strips than harvest H2.</p>

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Brief Communication: Calculating Theoretical Shade Patterns to Inform the Use of Strip Shelterwood Harvests for Developing Oak Advance Regeneration

  • 期刊论文

  • 发表日期：

    2025年10月21日

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  • Patrick Plaugher,
  • Jamie Schuler,
  • Kirsten Stephan

摘要

The strip shelterwood is a harvesting method that has shown promise in regenerating numerous tree species. Although the cut strips are often the focus for managers, the residual strips provide opportunities to cultivate advance regeneration due to increased light penetration from the sides. The increased understory light levels can develop oak advance regeneration which can be released after a period of 5–10 years by harvesting the residual strips. Using calculations of solar position, we determined theoretical shade patterns in strip shelterwoods with three different combinations of residual and cut strip widths immediately following the initial harvest. Strip shelterwood combinations comprised 75-ft-wide (0.625 × tree height) residual and cut strips (H1), 150-ft-wide (1.25 × tree height) residual and cut strips (H2), and 75-ft-wide residual strips and 150-ft-wide cut strips (H3). Harvest H3 had the greatest average proportion of area receive light to the forest floor within residual strips, along strip edges, and within cut strips. Harvest H1 had a greater average proportion of area receive light to the forest floor in the center of residual strips than in harvest H2; however, H1 had less area receive light in all other positions of the strip pairings. Based on these understory light regimes, we concluded that harvest H1 or H3 would provide a better understory light regime for oak seedling development within residual strips than harvest H2.