Current Trends for Red Alder After 100 Years of Proliferation
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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?

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Current Trends for Red Alder After 100 Years of Proliferation

Glenn AhrensOSU Extension ForesterClatsop and Tillamook Co.



Will Alder Harvest Increase? Proliferation

All species

Alder


Agenda
Agenda Proliferation

  • 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?

















Refuges for alder? component of the forest.

  • Riparian management areas

  • Unstable slopes

  • Wildlife habitat retention






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


~16.4 % Broadleaf PNW westside region (Alig et. al 2000)

Source: K. Norm Johnson 2002, CLAMS


~4.6 % Broadleaf PNW westside region (Alig et. al 2000)

Source: K. Norm Johnson 2002, CLAMS



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.


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


Will Alder Harvest Increase? more restricted to riparian areas, lower slopes.

All species

Alder


Source: Washington Hardwoods Commission more restricted to riparian areas, lower slopes.


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.


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