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Variability in Older Forest Structure in Western Oregon: Research Insights and Ecological Management

This report examines the variability in older forest structures across Western Oregon, focusing on Late-Successional Reserves (LSRs) and their management. Presented by Nathan Poage at the Western Mensurationists' Meeting, it discusses legitimate structural targets for young managed stands. The findings are essential for understanding tree species diversity, age structure, and forest management practices critical for ecological health. This research is pivotal for strategizing adaptive management and conservation in the region's congressionally reserved forests.

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Variability in Older Forest Structure in Western Oregon: Research Insights and Ecological Management

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  1. Variability in Older Forest Structure in Western Oregon Nathan Poage USDA Forest Service PNW Research Station RMP Program Western Mensurationists’ Meeting Fortuna, California June 19, 2006 Report = http://fresc.usgs.gov/products/papers/1445_Poage.pdf Data = http://fresc.usgs.gov/ArcIMS/Website/lsog/viewer.htm

  2. Northwest Forest Plan Land Use Allocations Late-Successional Reserves (LSRs) 7,533,000 ac Congressionally Reserved Areas 7,320,600 acMatrix 3,975,300 acRiparian Reserves 2,627,500 acAdaptive Management Areas 1,521,800 acAdministrative Withdrawn Areas 1,477,100 ac Total = 24,455,300 ac LSRs shownin yellow.

  3. What are “legitimate” structural targets for young,managed stands in Late-Successional Reserves? CurrentStructure ? ? ? ?

  4. Portland Oregon OR090-TS86-014 (eug\tc85\e04388) and photo (d_postdoc\d_bigtree\d_airphoto\site_092\2000-13-43.1-2.jpg) Poage and Tappeiner (2005) Tree species and size structure of old-growth forests in central western Oregon, USA. Forest Ecology and Management 204:329-343. Unit 1 (48 acres)

  5. BLM District (04 = Eugene) Sale Number Sub-Sale Number Species Code (01 = Douglas-fir) 888888888804388 010178000095 0210 204388011 12 2 6 6 304388011 12 3 6 6 6 204388011 16 3 5 6 6 104388011 16 4 5 6 6 6 204388011 16 6 5 6 6 6 6 6 104388011 20 4 5 5 6 6 104388011 20 5 5 5 5 6 6 204388011 20 6 5 5 5 6 6 6 4 Diameter Class (4 inch classes) Number of 16-foot Logs Log Grades (if graded) Number of Trees in Sub-Sale Fitting This Diameter and Log Grade Description

  6. Species – Diameter Distributions

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