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A Silvicultural Assessment of 10 Lodgepole Pine Stands After Partial Cutting to Reduce Susceptibility to Mountain Pine Beetle
Over the past 15 years, selective cutting prescriptions have been applied by forest operations in southeastern British Columbia as part of a strategy to reduce landscape-level susceptibility to damage from mountain pine beetle outbreaks. The prescriptions have been applied in stands where maintenance of some mature forest cover is needed to meet management objectives for viewscapes, recreation and habitat or to hold some pine volume during periods of rising beetle activity until it is required or available for harvest. In this study, we examined 10 of these sites 5 to 14 years after harvest, and determined current stand composition and structure from direct sampling and pre- and post-treatment stand characteristics from stand reconstruction. We then related these characteristics to original treatment specifications; the volume removed during harvest and remaining on site after treatment; subsequent losses to wind, snow or bark beetle damage; current stocking status; radial growth rates of residual overstorey trees; and the nature of fuel complexes created and effects of treatment on potential fire behaviour.
Effect of Commercial Thinning on Within-stand Microclimate and Fine Fuel Moisture Conditions in a Mature Lodgepole Pine Stand in Southeastern British Columbia
"The purpose of this study was to compare and contrast microclimatic and fine fuel moisture conditions in a natural stand of mature lodgepole pine (Pinus contorta Dougl. var. latifolia Engelm.) with an adjacent stand which was thinned to a uniform 4-m spacing between stems with respect to: within-stand microclimate elements that are likely to affect the moisture content of fine, dead surface fuels; measured moisture content of fine, dead surface fuels; and, differences between the actual moisture content of lodgepole pine needle litter versus equivalent values predicted by the Canadian Forest Fire Weather Index (FWI) System (Van Wagner 1987)."--Document.
Storing Beetle-killed Logs Under Snow to Reduce Losses After Mountain Pine Beetle Attack
To assess the potential to store beetle-killed logs under insulated snowpacks in British Columbia to preserve wood quality and maximize value recovery, we reviewed the literature and visited operations in eastern Canada, where the technique has been recently adapted to routine operations, and in Finland, where 3.5 million m3 of timber are stored under snow annually. We also visited storage terminals in Sweden where very large volumes of sawtimber have been stored since 2005. We identified three roles that cold storage could play in responding to the current mountain pine beetle outbreak: (1) where the outbreak is expanding rapidly and green-attack volume exceeds capacity of mills to process ...
Potential Loss Due to Decay and Insect Attack Following Selective Harvest in Coastal Montane Forests
Describes a study in which western hemlock and amabilis fir trees, windthrown after selective harvest at the Montane Alternative Silvicultural Systems research site on Vancouver Island, were examined for the presence of decay organisms and insects over 1994-95. Stem decay organisms were recovered and identified, and infection biology of these organisms is briefly discussed. The importance of minimizing injury to leaves during selective harvest is emphasized.
Potential Loss Due to Decay and Insect Attack Following Selective Harvest in Coastal Montane Forests
Describes a study in which western hemlock and amabilis fir trees, windthrown after selective harvest at the Montane Alternative Silvicultural Systems research site on Vancouver Island, were examined for the presence of decay organisms and insects over 1994-95. Stem decay organisms were recovered and identified, and infection biology of these organisms is briefly discussed. The importance of minimizing injury to leaves during selective harvest is emphasized.
Physics and Whitehead
Featuring discussions and dialogue by prominent scientists and philosophers, this book explores the rich interface of contemporary physics and Whitehead-inspired process thought. The contributors share the conviction that quantum physics not only corroborates many of Whitehead's philosophical theses, but is also illuminated by them. Thus, though differing in perspective or emphasis, the contributions by Geoffrey Chew, David Finkelstein, Henry Stapp and other scientists conceptually dovetail with those of Philip Clayton, Jorge Nobo, Yutaka Tanaka and other process philosophers.
