1 / 40

Current Trends for Red Alder After 100 Years of Proliferation

Current Trends for Red Alder After 100 Years of Proliferation. Glenn Ahrens OSU Extension Forester Clatsop and Tillamook Co. Background - key references. Will Alder Harvest Increase?. All species. Alder. Agenda. Red alder - 100 years of proliferation?

amir-hardin
Download Presentation

Current Trends for Red Alder After 100 Years of Proliferation

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Current Trends for Red Alder After 100 Years of Proliferation Glenn AhrensOSU Extension ForesterClatsop and Tillamook Co.

  2. Background - key references

  3. Will Alder Harvest Increase? All species Alder

  4. Agenda • Red alder - 100 years of proliferation? • Early forest disturbance and resource trends. • Recent forest management trends and impacts on alder. • Current and future trends for alder – How far will alder fall?

  5. Alder has been more abundant in past climate cycles.

  6. Red alder rises again during the 1900’s

  7. Western Oregon and western Washington, Andrews and Cowlin 1940.

  8. Western Oregon and western Washington, USFS FIA IDB database 2006

  9. Western Oregon and western Washington, Andrews and Cowlin 1940.

  10. Western Oregon and western Washington, USFS FIA IDB database 2006.

  11. Sources: Raettig et. al 1995, Gray et. al 2002, Azuma et al. 2005

  12. Source: USFS Forest Inventory and Analysis, BC Ministry of Forests

  13. Source: USFS Forest Inventory and Analysis, BC Ministry of Forests ~1995-2000

  14. Source: USFS Forest Inventory and Analysis

  15. Abundant alder is a legacy of past practices. • Modern forest practices generally reduce the alder component.

  16. Source: USFS Forest Inventory and Analysis

  17. Source: USFS Forest Inventory and Analysis

  18. Source: USFS Forest Inventory and Analysis

  19. Land Development has a disproportionate effect on the alder component of the forest.

  20. Refuges for alder? • Riparian management areas • Unstable slopes • Wildlife habitat retention

  21. Riparian area restoration – girdle alder and plant conifers?

  22. Knowledge of and management for alder is increasing.

  23. Foresters often leave alder in young stands when it appears to be the “best tree”.

  24. Non-industrial private owners are not aggressively favoring conifers…

  25. Projections of area of red alder by private ownerships in PNW westside region (Alig et. al 2000)

  26. ~16.4 % Broadleaf Source: K. Norm Johnson 2002, CLAMS

  27. ~4.6 % Broadleaf Source: K. Norm Johnson 2002, CLAMS

  28. Climate change scenarios and potential shifts in the range of red alder (Shafer et. al 2001)

  29. After a rapid increase in abundance during the 1900’s, red alder is now declining. • Early logging ,land clearing, and burning favored proliferation of alder. • Increasing management to meet landowner objectives - most major landowners reduced alder. • Encroachment of non-forest development, particularly on lowlands with abundant alder.

  30. Changing patterns of alder occurrence – smaller patches, more restricted to riparian areas, lower slopes.

  31. Will Alder Harvest Increase? All species Alder

  32. Source: Washington Hardwoods Commission

  33. How far will alder fall? - uncertain balance determines the future of the red alder • Management favoring conifers on major private and public lands. • Non-forest development, particularly on lowlands. • Increasing value of alder – major industry and employment. • Increasing management for alder - both economic and ecological goals. • Climate change affects on suitability of sites for alder.

  34. Private non-industrial forests are increasingly important for alder. • Alder is a major component on private non-industrial (NI) forest lands. • With diverse goals and less intensive management - alder is more likely to regenerate/persist. • NI forest lands are also most susceptible to development.

More Related