Status and trends of Washington’s forest lands, 1990-2001
Andrew Gray, Charles Veneklase, Robert Rhoads,
Jeremy Fried, Glenn Christensen, and Larry Potts
Forest Inventory and Analysis Program
Inventory Objectives
• Area, status, and trends of forest land:
– volume and ownership
– net growth, mortality, and removals
– insect and disease impacts
• Forest health monitoring
• Aid assessment of sustainable resource
use (e.g. Santiago Declaration)
Washington land class
Land area=42,675 ac
Eastern Washington
Land area: 26,860 ac
Western Washington
Land area: 15,815 ac
Area of forest land by owner
9
Reserved forest
Other forest
Timberland
8
7
Millions of acres
6
5
4
3
2
1
0
National Forest Other federal
State+local
Industry
Owner group
Native Am.
Other private
Area by forest type
Alaska cedar
Douglas-fir
Engelmann spruce
Grand fir
Lodgepole pine
Mountain hemlock
Noble fir
Pacific silver fir
Pacific yew
Ponderosa pine
Sitka spruce
Subablpine larch
Subalpine fir
Western hemlock
Western larch
Western redcedar
Western white pine
Whitebark pine
Bigleaf maple
Black cottonwood
Cherry
Oregon ash
Oregon white oak
Quaking aspen
Red alder
Western paper
Willow
Unknown type
Nonstocked
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7 7.5 8
Million acres
Area of site class by owner
2
National Forest
Other Public
Forest Industry
Other Private
1.8
1.6
Millions of acres
1.4
1.2
1
0.8
0.6
0.4
0.2
0
225+
165-224
120-164
85-119
50-84
Estimated mean annual increment at culmination (ft3/ac/yr)
20-49
Stand size class by owner, timberland
3.5
National Forest
Other Public
Forest Industry
Other Private
3
Millions of acres
2.5
2
1.5
1
0.5
0
Nonstocked
< 5"
5-9"
Stand size class (QMD)
9-20"
>20"
Old FIA: non-NFS timberland
Forest
Non-forest
Sawtimber by species and owner group
60
Billion board feet (Scribner)
50
Other hardwood
Red alder
Western larch
Other pines
Ponderosa pine
Western redcedar
Western hemlock
Spruce
True fir
Douglas-fir
40
30
20
10
0
Other Public
Forest Industry
Owner group
Other Private
Change in timberland area
(thousand acres)
Timberland 1990
Net to NFS
To reserved
To non-forest
7,397
-30 Snoqualmie and Gorge
-60 Primarily DNR
-270 4.7% of private area
Timberland 2000
7,037
Net private to public
148
WWA: loss of private timberland
1.4 million acres lost 1935-2000, some to public, ~25,000 ac/yr to nonforest
7.0
6.0
Million acres
5.0
4.0
3.0
2.0
1.0
0.0
1935
1980
1990
Year
2000
2010?
Periodic change in volume
10
Westside
Eastside
9
Growth
Mortality
Removals
8
Billion cubic feet
7
6
5
4
3
2
1
0
Other public
Forest
industry
Other
private
Other public
Forest
industry
Other
private
Timber harvest 1955-2001
8
National forest
Other public
Private
Billion board feet (Scribner)
7
6
5
4
3
2
1
0
1955 1958 1961 1964 1967 1970 1973 1976 1979 1982 1985 1988 1991 1994 1997 2000
Year
WWA Volume change 1968-2000
6000
5000
Public
Industry
Other private
remaining
growth
removals
mortality
4000
3
Volume (ft /ac)
3000
2000
1000
0
-1000
-2000
-3000
1968 1979 1989 2000 1968 1979 1989 2000 1968 1979 1989 2000
Snag density by ownership
30
<20"
>=20"
82
Mean density (#/ac)
25
20
15
10
5
0
National Forest
Other Public
Forest Industry
Owner group
Other Private
100
Douglas-fir forest type
80
Mean cover (%)
Understory
cover by forest
type, WWA
60
40
20
100
0
Red alder forest type
Western hemlock forest type
grass
forb
shrub
total
Mean cover (%)
80
60
40
20
0
0
20
40
Stand age (yrs)
60
80
0
10
20
30
40
50
Stand age (yrs)
60
70
80
The new FIA
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Growth Modeling with Climate (UW)
GNNfire: mapping fuels + fire potential (PNW)
Historic Survey maps + data
Mapping wildland-urban interface
Post-fire re-measurement (R6)
Land use change with satellite data (UW)
Species distribution/climate change modeling (OSU)
National Park monitoring (USGS+NPS)
Wildlife habitat assessment and modeling (OSU)
1902 King county cruise (UW)