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Paul D. Anderson - Trends in Early Seral Forest at the Stand and Landscape Scales
- 1. Trends in Early-Seral Forest at the Stand and Landscape Scales Paul D. Anderson & Janet Ohmann PNW Research Station, USDA Forest Service, Corvallis, Oregon
- 2. Factors influencing forest composition and structure Regional scale Local scale Landscape and regional pattern Population processes: biotic, social/economic Topography, microclimate, substrate Species interactions Climate History Community composition, structure Disturbance ( human: forest management, land use; natural: fire, wind, insects) land ownership
- 3. Factors influencing forest composition and structure Regional scale Local scale Landscape and regional pattern Population processes: biotic, social/economic Topography, microclimate, substrate Species interactions Climate History Community composition, structure Disturbance ( human: forest management , land use; natural: fire, wind, insects) land ownership
- 7. Production Forestry: Natural Regeneration or Planting? Seed Source? Seed bed? Advanced Regeneration? Stock? Planting Sites? Labor Force? Acceptable Levels of Uncertainty? Timing Species Composition Density Genetic Potential Competition Photo: Doug Maguire, www.forestryimages.org Photo: Sam Chan, USFS Photo: Dan Mikowski, USFS Photo: Dan Mikowski, USFS
- 8. Production Forestry: Site Preparation and Vegetation Control Photo: James N. Long, Utah State University, www.forestryimages.org Photo: Paul Anderson, USFS Photo: Doug Maguire, www.forestryimages.org
- 9. Production Forestry: Vegetation Control Adapted from Wagner (2000) Tree Growth Variable of Concern Level of Vegetation Control Level of Stand Productivity Diameter (Biomass) Height Survival Overtopping Woody Cover < 20 % Cover Present Maximum Site Potential 20 – 30% of Site Potential Zero Productivity All Woody and Herb Cover Removed Competing Vegetation
- 15. Historical Trend in Regional Silviculture Activity: Reforestation
- 16. Historical Trend in Regional Silviculture Activity: Timber Stand Improvement
- 17. Trends in Forest Harvest: Siuslaw NF
- 19. Intensive Silviculture Photo: David Larson, USFS Photo: David Larson, USFS e
- 21. Alternatives to Clearcutting & Thinning for Structural Diversity: Regional Large-Scale Silviculture Research Photo: USDA Forest Service, PNW Research Station Photo: Doug Maguire, www.forestryimages.org Photo: Doug Maguire, www.forestryimages.org
- 22. Alternatives to Clearcutting & Thinning for Structural Diversity: Regional Large-Scale Silviculture Research Photo courtesy of USDA Forest Service, PNW Research Station Poage and Anderson (in press)
- 23. Ongoing Large-Scale Silviculture Experiments of western Oregon and Washington 1,000 ft 0 10 20 30 40 50 60 70 90 80 100 60 70 80 90 50 100 Treatment-Wide Percent Residual Basal Area (%) Matrix as Percent of Total Treatment Area (%) CFS (4a) DEMO (2a) DEMO (3a) DEMO (4a) DEMO (3b) STUDS (2a) STUDS (4a) STUDS (3a) YSTDS (2a) YSTDS (2b) YSTDS (4a) UAMP (4a) CFS (2a) UAMP (2b) OHDS (3a-d) LTEP (5a-d) FES (3a-b) DMS_RT (3a) DMS_IT (3b) DMS_IT (3a) DMS_IT (2a) gap (overstory removed) patch (unthinned) 10 ac Controls (1a) CWS (3a) CWS (4a) CFS (5a) DEMO (4b) CFS (3a) CFS (3b) (unthinned) CWS (4b-c) LTEP (3a-b) UAMP (2a) Poage and Anderson (in press)
- 26. Photo: Paul Anderson, USFS Photo: Paul Anderson, USFS Photo: Paul Anderson, USFS Photo: Paul Anderson, USFS Photo: Dan Mikowski, USFS
- 27. Timbered Rock Reforestation Alternatives Passive Intensive Treatment Management Intensity Management Priorities Natural Development Tree & Shrub Diversity Tree Diversity & Productivity Productivity & Diversity Mixed-Conifer 435 TPA Unweeded Mixed-Conifer 435 TPA Manual Weeding Unplanted Unweeded Mixed-Conifer 190 TPA Unweeded Mixed-Conifer 190 TPA Manual Weeding Douglas-fir 435 TPA Manual Weeding
- 29. ( Paul - Stop Talking!) Thank You
Notas del editor
- Now widely recognized that plant community struc. (and how it’s expressed as landscape pattern) results from many interacting factors, envt. and disturbance/processes, that operate from local to regional scales. What you see on any point on the ground = function of time since disturbance, and kind of disturb., and location along biophysical gradients. Historically (pre-European settlement): natural disturbance regimes produced dynamic mosaics of vegetation types. Current landscape: disturbance regime dominated by timber harvest and management activities and fire exclusion, constrained by ownership and management goals. However, underlying environmental gradients still have a strong imprint.
- Now widely recognized that plant community struc. (and how it’s expressed as landscape pattern) results from many interacting factors, envt. and disturbance/processes, that operate from local to regional scales. What you see on any point on the ground = function of time since disturbance, and kind of disturb., and location along biophysical gradients. Historically (pre-European settlement): natural disturbance regimes produced dynamic mosaics of vegetation types. Current landscape: disturbance regime dominated by timber harvest and management activities and fire exclusion, constrained by ownership and management goals. However, underlying environmental gradients still have a strong imprint.
- Reserve paradigm won’t work for a forest condition that’s tied to disturbance and short-lived in the successional sequence – new approaches needed