Twelve-year responses of planted and naturally regenerating conifers to variable-retention harvest in the Pacific Northwest, USA
作者： Lauren S. Urgenson , Charles B. Halpern , Paul D. Anderson
关键词: Variable retention 、 Natural regeneration 、 Forestry 、 Biology 、 Basal area 、 Vegetation 、 Agronomy 、 Slash (logging) 、 Seral community 、 Pinus <genus> 、 Range (biology)
摘要: We studied patterns of conifer regeneration over 12 years as part a regional-scale experiment in variable-retention harvest the Pacific Northwest, DEMO Study. compared survival and height growth planted conifers density seral composition natural among treatments with differing retention levels (15% versus 40%) (dispersed aggregated) replicated across range latitudes forest zones. also assessed plot-scale relationships overstory basal area, competing vegetation, slash accumulations. Early (1- to 2-year) seedlings was greater dispersed (Pinus monticola Douglas ex D. Don, Abies spp.) or unaffected by level pattern (Pseudotsuga menziesii (Mirb.) Franco). Later (5- 12-year) did not differ (all species), but distinctly reduced (or) at higher retention. Density 1....
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