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Understanding Timber Volume Distribution and Inventory in Crab Bay's Productive Young Growth Forests

This analysis explores the timber volume distribution and forest inventory data from the 1980s to the 1990s in the Crab Bay area of SE Chichagof. It examines the classification of productive young growth forests, including how rich old-growth stands and less valuable stands have been consolidated into volume classes. Highlighting concerns raised by wildlife biologist John Schoen, the study evaluates the impacts of concentrated timber harvests on alluvial and colluvial surfaces, and the need for improved quantifiable mapping to inform sustainable forest management practices.

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Understanding Timber Volume Distribution and Inventory in Crab Bay's Productive Young Growth Forests

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  1. Productive Young Growth

  2. Productive Young Growth

  3. 1980s Forest Inventory

  4. 1980s Forest Inventory 1979 Timber Type Volume Classes

  5. 1980s Forest Inventory 1997 TLMP Volume Strata

  6. Productive Young Growth

  7. “Richest old-growth stands and less-valuable stands are lumped into one class, high volume” Wildlife Biologist, John Schoen (Defenders 1998)

  8. Crab Bay ( VCUs 232-234 )

  9. SE Chichagof Landscape Analysis Crab Bay

  10. SE Chichagof Landscape Analysis Timber harvest has been disproportionately concentrated on alluvial/colluvial surfaces

  11. Crab Bay N

  12. N

  13. Crab Bay N

  14. N

  15. Timber Type VC 6 VC 6 VC 6 VC 6 Crab Bay N

  16. Volume Class 4 Volume Class 5 Volume Class 6 Clear Cut Crab Bay N

  17. Crab Bay Volume Class 4 Volume Class 5 Volume Class 6 Clear Cut

  18. VC 6 & 7 Harvested

  19. Volume Class 4 Volume Class 5 Volume Class 6 Clear Cut Volume Class 5 Volume Class 6 N

  20. (n=25) (n=19)

  21. (n=25) (n=19)

  22. Volume Class 5 Volume Class 6

  23. Volume Class 5 Volume Class 6 Timber Volume?

  24. (n=25) (n=19)

  25. Volume Class 4 Volume Class 5 Volume Class 6 Clear Cut Crab Bay N

  26. 1994 Lawsuit

  27. 1994 - Timber Volume Paradigm * Allowable Sale Quantity (ASQ) * Proportionality * Wildlife Studies/Models * Volume Distribution Pie Charts

  28. TLMP Volume Strata (1997) L M H

  29. Deconstructing the timber volume paradigm in the management of the Tongass National Forest (Caouette, Kramer, & Nowacki 2000. PNW GTR)

  30. High Volume High Density Forest

  31. We need better quantifiable mapping objectives (Caouette, Kramer, & Nowacki 2000. PNW GTR)

  32. 1980s Forest Inventory

  33. 1980s Forest Inventory

  34. 3 2 4 1 200’ 5 6

  35. 1980s Forest Inventory

  36. 1990s Forest Inventory

  37. Productive Old Growth V4 V5 V67 Yes No Yes No Hydric Soils Hydric Soils V5 V67 V4 V5 - H V4 - H North* South North* South ** ** Aspect Aspect V5 - N V5 - S V67 V4 - S V4 - H V4 - N V5 - H * North = 292.5 -- 57.5 + flat (no aspect) ** South = 67.5 -- 292.5 degrees

  38. 1980s Forest Inventory

  39. 1990s Forest Inventory

  40. V4-H V4-N V4-S V5-H V5-N V5-S V67

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