Variability in Older Forest Structure

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/144
5_Poage.pdf Data http//fresc.usgs.gov/ArcIMS/We
bsite/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Areas 1,521,800 acAdministrative Withdrawn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\2000-13-4
3.1-2.jpg)
Poage and Tappeiner (2005) Tree species and size
structure of old-growth forests in central
western Oregon, USA. Forest Ecology and
Management 204329-343.
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