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Vegetation Management Alternatives

Vegetation Management Alternatives. Section II. What are the alternatives and what is their silvicultural effectiveness? Al Wiensczyk, FORREX. What are the Alternatives? Methodology. Reviewed the scientific literature for information Used experiential knowledge of project team and others

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Vegetation Management Alternatives

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  1. Vegetation Management Alternatives Section II. What are the alternatives and what is their silvicultural effectiveness? Al Wiensczyk, FORREX ...

  2. What are the Alternatives?Methodology • Reviewed the scientific literature for information • Used experiential knowledge of project team and others • Gathered info on species autecology and treatment effectiveness • Very limited info on some treatments, quite extensive on others • Similarly very limited data on some competitive species – lots on others

  3. What are the Alternatives?CCFM Database • Canadian Forest Management Database • Dean Thompson • http://www.glfc.forestry.ca/cfpm/index.cfm?lang=eng

  4. What are the alternatives? Non-crop vegetation in the boreal forest Positive or negative effects on crop trees Depends on Autecology of respective species (including reproductive strategy). Non-crop species density Non-crop species size relative to that of the crop trees Differences in site quality Effect may change over time

  5. What are the alternatives? Autecologyinformation

  6. What are the alternatives? AutecologyInformation

  7. What are the alternatives? Silvicultural activities (harvesting, site preparation, thinning) Autecological characteristics of unwanted forest plants Prevention loop Yes Alter silvicultural activities Yes Favourable environment Removal loop No No Desired stand Release treatments Vegetation Management Treatment Options Decision Making Process(from Wagner et al. 2001)

  8. What are the alternatives? Treatment Groups • Harvesting Systems • Physical • Thermal • Cultural • Chemical and Biological spray

  9. What are the alternatives? Silviculture and harvest systems • Silviculture System • Clearcut, modified clearcut, shelterwood, selection • Harvest disturbance • Influenced by • Harvest system • Season of harvest • Equipment used • Operator training and skill • Harvest System • Full tree, tree length, cut-to-length

  10. What are the alternatives? Physical Treatments • Mechanical Site preparation • Brushing • Manual • Motor-manual • Mechanical • Girdling • Mulches

  11. What are the alternatives? Thermal Treatments • Prescribed Fire • Steam

  12. Microsite description Effect of disturbance on reproduction  = promotes ( = strongly promotes) 0 = no effect  = discourages ( = strongly discourages)

  13. What are the alternatives? Cultural Treatments • Seedling Culture • Cover Crops • Grazing

  14. What are the alternatives? Chemical and Biological Spray Treatments • Herbicides • Application methods • Biologicals

  15. Vegetation Management Alternatives Section III: What are the environmental consequences of using silviculturally effective alternatives? Kathie Swift, FORREX Wayne Bell, OMNR

  16. What are the environmental consequences? Environmental effects • Lots of literature available on the effects of some treatments, less for others • Due to complexity of responses, focus put on principal messages • Treatments can have a positive effect on one element and a negative effect on another

  17. What are the environmental consequences? Abiotic Values Photo: Rhodes University Photo: Utah Bureau of Land Management • Air Quality • Soil Properties/Nutrition • Water Quality and Quantity

  18. What are the environmental consequences? Biotic Values • Plants (diversity) • Fish/Fish Habitat • Terrestrial Invertebrates • Amphibians and Reptiles • Song birds • Small Mammals • Mid-large Mammals

  19. What are the environmental consequences? Spatial Values • Stand/Landscape changes

  20. What are the environmental consequences? Example of how information is presented

  21. What are the environmental consequences? Example of how information presented

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