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Introduction to Silvicultural Systems

I ntro to the Forester’s Craft or How is Scientific Forestry different than just cutting down trees? and getting towards What is the “forestry” in community-based forestry. Introduction to Silvicultural Systems. BC Ministry of Forests Forest Practices Branch.

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Introduction to Silvicultural Systems

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  1. Intro to the Forester’s Craftor How is Scientific Forestry different than just cutting down trees?and getting towardsWhat is the “forestry” in community-based forestry

  2. Introduction to Silvicultural Systems BC Ministry of Forests Forest Practices Branch http://www.for.gov.bc.ca/hfp/training/00014/index.htm

  3. A silvicultural system … is a planned program of treatments during the whole life of a stand designed to achieve specific stand structural (and species composition) objectives. This program of treatments integrates specific harvesting, regeneration, and stand tending (TSI) methods to achieve a predictable yield of benefits from the stand over time.

  4. Main silvicultural systems Even-aged systems • clearcut • patch cut • seed tree • shelterwood • coppice • retention system Uneven-aged systems • single tree selection • group selection

  5. Stand volume and growthBasal areaSite IndexMean annual increment (MAI)

  6. Even Aged Systems The stand overstory is generally removed in one harvest. New even-aged stands are regenerated after harvest within the previously cleared block.

  7. Even-aged continued Shelterwood Retention

  8. Some stands are “naturally” even-aged monocultures, e.g. lodgepole pine Parks Canada http://www.pc.gc.ca/progs/np-pn/eco/eco5_e.asp U. of Northern British Columbia http://web.unbc.ca/~lindgren/RESEARCH/mgraf/index.html

  9. Alternatives to managing lodgepole pine 1934 CCC heavy thinning from below, OR Yale U, Global Forestry Institute Itcha-Ilgachuz Alternative Silvicultural Systems, BC Natural Resources Canada

  10. 1934 Black Hills National Forest, SD Yale U, Global Forestry Institute

  11. Uneven Aged Treatments Single Tree Selection Group Selection

  12. Size/Age distribution in Uneven-aged systems Prince Edward Island Institute of island Studies, U. of PEI http://www.upei.ca/islandstudies/rep_wm_1.htm Lonnie E. Varnedoe, Jr., University of Georgia http://warnell.forestry.uga.edu/service/library/b1032/index.html

  13. Some take home messages … • Via silviculture, one can manipulate vegetation (cut & grow) to achieve different objectives – timber, wildlife, pest management, aesthetics, “late successional” characteristics, fuels reduction, etc. • Don’t confuse the tools with the goals. • Good management costs money! Usually more money than we can get from the private goods produced.

  14. Beyond silviculture … What else does a forester do? • Develop management plan that includes: • Silvicultural objectives, systems & calculated outcomes • Harvest technology • Road systems • Soil erosion & compaction prevention and mitigation • Protected areas – wetlands, riparian, TES, cultural features • Maps • Connection to markets & community & ecology • Communicate with landowners, public, agencies, neighbors, loggers, mills • Keep abreast of regulations & best practices

  15. So how is forestry in community forestry different? • It might not be … • Same suite of tools can achieve different objectives • Broader objectives • Reflecting a diverse community • Local participation & benefit • Triple bottom line: ecological , social, economic • Learning and Monitoring • Adaptive management areas • Pilots, demos, experiments • Local knowledge & breaking science

  16. Examples to come …

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