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
Northwest Forest Plan
Land Use Allocations
Late-Successional Reserves (LSRs)
Congressionally Reserved Areas
Matrix
Riparian Reserves
Adaptive Management Areas
Administrative Withdrawn Areas
7,533,000 ac
7,320,600 ac
3,975,300 ac
2,627,500 ac
1,521,800 ac
1,477,100 ac
Total = 24,455,300 ac
LSRs shown
in yellow.
What are “legitimate” structural targets for young,
managed stands in Late-Successional Reserves?
Current
Structure
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Portland
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Oregon
OR090-TS86-014 (eug\tc85\e04388) and photo
(d_postdoc\d_bigtree\d_airphoto\site_092\2000-13-43.1-2.jpg)
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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)
BLM District
(04 = Eugene)
Sale
Number
888888888804388
04388011 12 2 6
04388011 12 3 6
04388011 16 3 5
04388011 16 4 5
04388011 16 6 5
04388011 20 4 5
04388011 20 5 5
04388011 20 6 5
Diameter Class
(4 inch classes)
Number of
16-foot Logs
Sub-Sale
Number
Species Code
(01 = Douglas-fir)
010178000095
6
6
6
6
6
5
5
5
6
6
6
6
6
5
5
6
6 6 6
6
6 6
6 6 6
Log Grades
(if graded)
0210 2
3
2
1
2
1
1
2
4
Number of Trees in Sub-Sale
Fitting This Diameter and
Log Grade Description
Species – Diameter Distributions
Trees per Acre
4
3
2
1
0
12
24
36
48
60
72
DBH (inches)
Douglas-fir
Cedar
Hemlock
84