productive young growth 1980s forest inventory
TRANSCRIPT
Productive Oldgrowth
2nd Growth
Non-Forest
Forested, low productivity
Productive Young Growth
Productive Oldgrowth
2nd Growth
Non-Forest
Forested, low productivity
Productive Young Growth
VC4 = 8-20
VC5 = 20-30
VC6 = 30-50
VC7 = 50+
1980s Forest Inventory
0.0
5.0
10.0
15.0
20.0
25.0
30.0
35.0
40.0
45.0
50.0
VC4 VC5 VC6 VC7
Ne
t B
oa
rd F
oo
t V
olu
me
1980s Forest Inventory
1979 Timber Type Volume Classes
0
5
10
15
20
25
30
35
40
45
Low Medium High
Net
Boa
rd F
oot V
olum
e (1
,000
s)
1980s Forest Inventory
1997 TLMP Volume Strata
Productive Oldgrowth
2nd Growth
Non-Forest
Forested, low productivity
Productive Young Growth
Low
High
Medium
“Richest old-growth stands and less-valuable stands are lumped into one class, high
volume”
Wildlife Biologist, John Schoen
(Defenders 1998)
Crab Bay ( VCUs 232-234 )
Crab Bay
SE Chichagof Landscape Analysis
SE Chichagof Landscape Analysis
Timber harvest has been disproportionately concentrated on
alluvial/colluvial surfaces
N
Crab Bay
N
N
Crab Bay
N
Timber Type
N
VC 6
VC 6
VC 6VC 6
Crab Bay
N
Volume Class 4
Volume Class 5
Volume Class 6
Clear Cut
Crab Bay
Crab Bay
Volume Class 4
Volume Class 5
Volume Class 6
Clear Cut
Harvested
VC 6 & 7
Volume Class 4
Volume Class 5
Volume Class 6
Clear Cut
N
Volume Class 5
Volume Class 6
10
15
20
25
30
35
VC5 VC6
Qu
adra
tic
Mea
n D
iam
.
10
30
50
70
90
110
130
VC5 VC6
Tre
es
pe
r A
cre
(n=19)(n=25)
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
VC5 VC6% o
f p
lots
wit
h t
rees
> 4
0"
(n=19)(n=25)
Volume Class 5
Volume Class 6
Volume Class 5
Volume Class 6
Timber Volume?
10
15
20
25
30
35
40
45
VC5 VC6Tim
be
r V
olu
me
(1
,00
0s
)
(n=19)(n=25)
N
Volume Class 4
Volume Class 5
Volume Class 6
Clear Cut
Crab Bay
1994 Lawsuit
1994 - Timber Volume Paradigm
* Proportionality
* Wildlife Studies/Models
* Volume Distribution Pie Charts
* Allowable Sale Quantity (ASQ)
TLMP Volume Strata (1997)
L
M
H
Deconstructing the timber volume paradigm in the
management of the Tongass National Forest
(Caouette, Kramer, & Nowacki 2000. PNW GTR)
High Volume
High Density Forest
We need better quantifiable mapping objectives
(Caouette, Kramer, & Nowacki 2000. PNW GTR)
1980s Forest Inventory
1980s Forest Inventory
2
6
4
5
1 200’
3
1980s Forest Inventory
1990s Forest Inventory
V67V4
V4-N V4-S
AspectSouth**North*
V5
V5-H V5-S
AspectSouth**North*
V5
V4-H
Productive Old Growth
* North = 292.5 -- 57.5 + flat (no aspect)
** South = 67.5 -- 292.5 degrees
V67
Yes No Yes NoHydric Soils
V5-HV4-H V4
V5-N
V67
Hydric Soils
1980s Forest Inventory
1990s Forest Inventory
V4-HV4-NV4-SV5-HV5-NV5-SV67
