Current Trends for Red Alder After 100 Years of Proliferation
This presentation is the property of its rightful owner.
Sponsored Links
1 / 40

Current Trends for Red Alder After 100 Years of Proliferation PowerPoint PPT Presentation


  • 93 Views
  • Uploaded on
  • Presentation posted in: General

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?

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.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Current trends for red alder after 100 years of proliferation

Current Trends for Red Alder After 100 Years of Proliferation

Glenn AhrensOSU Extension ForesterClatsop and Tillamook Co.


Current trends for red alder after 100 years of proliferation

Background - key references


Current trends for red alder after 100 years of proliferation

Will Alder Harvest Increase?

All species

Alder


Agenda

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?


Current trends for red alder after 100 years of proliferation

Alder has been more abundant in past climate cycles.


Current trends for red alder after 100 years of proliferation

Red alder rises again during the 1900’s


Current trends for red alder after 100 years of proliferation

Western Oregon and western Washington, Andrews and Cowlin 1940.


Current trends for red alder after 100 years of proliferation

Western Oregon and western Washington, USFS FIA IDB database 2006


Current trends for red alder after 100 years of proliferation

Western Oregon and western Washington, Andrews and Cowlin 1940.


Current trends for red alder after 100 years of proliferation

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


Current trends for red alder after 100 years of proliferation

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


Current trends for red alder after 100 years of proliferation

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


Current trends for red alder after 100 years of proliferation

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


Current trends for red alder after 100 years of proliferation

Source: USFS Forest Inventory and Analysis


Current trends for red alder after 100 years of proliferation

  • Abundant alder is a legacy of past practices.

  • Modern forest practices generally reduce the alder component.


Current trends for red alder after 100 years of proliferation

Source: USFS Forest Inventory and Analysis


Current trends for red alder after 100 years of proliferation

Source: USFS Forest Inventory and Analysis


Current trends for red alder after 100 years of proliferation

Source: USFS Forest Inventory and Analysis


Current trends for red alder after 100 years of proliferation

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


Current trends for red alder after 100 years of proliferation

Refuges for alder?

  • Riparian management areas

  • Unstable slopes

  • Wildlife habitat retention


Current trends for red alder after 100 years of proliferation

Riparian area restoration – girdle alder and plant conifers?


Current trends for red alder after 100 years of proliferation

Knowledge of and management for alder is increasing.


Current trends for red alder after 100 years of proliferation

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


Current trends for red alder after 100 years of proliferation

Non-industrial private owners are not aggressively favoring conifers…


Current trends for red alder after 100 years of proliferation

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


Current trends for red alder after 100 years of proliferation

~16.4 % Broadleaf

Source: K. Norm Johnson 2002, CLAMS


Current trends for red alder after 100 years of proliferation

~4.6 % Broadleaf

Source: K. Norm Johnson 2002, CLAMS


Current trends for red alder after 100 years of proliferation

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


After a rapid increase in abundance during the 1900 s red alder is now declining

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.


Current trends for red alder after 100 years of proliferation

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


Current trends for red alder after 100 years of proliferation

Will Alder Harvest Increase?

All species

Alder


Current trends for red alder after 100 years of proliferation

Source: Washington Hardwoods Commission


How far will alder fall uncertain balance determines the future of the red alder

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.


Private non industrial forests are increasingly important for alder

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.


  • Login