Alternative Silvicultural Techniques for European Sub-alpine and Montane Protection Forests: Managing for community protection, disturbance resistance and resiliency, and timber production Harold Zald, Dept. Forest Science, OSU. Chamonix, France. Protection forest overview
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Alternative Silvicultural Techniques for European Sub-alpine and Montane Protection Forests:
Managing for community protection, disturbance resistance and resiliency, and timber production
Harold Zald, Dept. Forest Science, OSU
Protective functions, resistance, and resiliency
directly protect people, buildings, and infrastructure
against the impacts of natural hazards such as rockfall
protect the site a forest occupies against processes
such as soil erosion and debris flows
Stability of protection forests over time requires managing for both
resistance and resilience to rockfall and avalanche
The ability of a protection forest to slow or dissipate the energy
and matter generated in a rockfall or avalanche.
The ability to recover direct-protection resistance characteristics
following a natural hazard (or other) disturbance event.
Protection forest attributes: Stem Density
Increased stem densities increase resistance to rockfall and avalanches
Dorren et al. 2004. Geomorphology
Simulated rockfall patterns (rockfall accumulation in black)
a) current forest, b) 50% stem reduction, c)100% stem reduction.
Protection forest attributes:
Protection forest attributes: Forest Floor/Understory
Alternative Silvicultural Applications
Understory/Forest Floor Management
Silvicultural Application Layout
Density, Diameters, and Developmental Stages
Ott 1989 Schonenburger 2001. For. Eco. Man.
Harvest Layout and Landscape Considerations
Dorren et al. 2004. For. Eco. Man.
Changing Objectives, Changing Perceptions