anita rose usda forest service september 10 th , 2003
DESCRIPTION
Virginia’s Forests. Anita Rose USDA Forest Service September 10 th , 2003. Virginia’s Forests ~. Preliminary results from the 2001 survey. Area Trends Age Structure Trends Volume Trends Growth & Removal Trends Mortality Trends Coarse Woody Debris. Area Trends. Forest land. - PowerPoint PPT PresentationTRANSCRIPT
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Virginia’s Forests
Anita RoseUSDA Forest Service September 10th, 2003
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Virginia’s Forests ~
• Area Trends
• Age Structure Trends
• Volume Trends
• Growth & Removal Trends
• Mortality Trends
• Coarse Woody Debris
Preliminary results from the 2001 survey
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Area Trends
Forest land
0
5
10
15
20
25
1630 1907 1940 1957 1966 1977 1986 1992 2001
Mill
ion
Ac
res
Year
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Area ~ CurrentAcres of forest land by unit and land class
0.0
2.0
4.0
6.0
Coastal Plain Piedmont Mountains
Non-Forest Land Timberland Reserved Other Forest
Mill
ion
Ac
res
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Area TrendsAcres of timberland by forest management type
0.0
2.0
4.0
6.0
8.0
10.0
Pine plantation Natural pine Oak-pine Uplandhardwood
Lowlandhardwood
1992
2001
Mill
ion
Ac
res
Management Type
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Area TrendsAcres of timberland by ownership
0.0
2.0
4.0
6.0
8.0
10.0
12.0
National forest Other Public Forest industry Individual Corporate
1986
1992
2001
Mill
ion
Ac
res
Ownership Class
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Age Structure Trends
Softwoods
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
0-10 11-20 21-30 31-40 41-50 51-60 61-70 71-80 81+
1992
2001
Age Class (years)
Mil
lio
n a
cres
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Age Structure Trends
Hardwoods
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
0-10 11-20 21-30 31-40 41-50 51-60 61-70 71-80 81+
1992
2001
Age Class (years)
Mil
lio
n a
cres
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Volume Trends
Live trees by survey year
0.0
5.0
10.0
15.0
20.0
25.0
1940 1957 1966 1977 1986 1992 2001
Softwoods
Hardwoods
Year
Bill
ion
cu
. ft.
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Volume Trends
Live softwoods by species
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
Loblolly pine Virginia pine Eastern whitepine
Other softwoods
1992
2001
Species
Bill
ion
cu
. ft.
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Volume Trends
Live hardwoods by species
0.0
1.0
2.0
3.0
4.0
5.0
6.0
White oaks Red oaks Yellow-poplar
Soft maple Hickory Other
1992
2001
Bil l
ion
cu
. ft.
Species
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Volume Trends
Live softwoods on timberland by diameter class
0.0
0.3
0.6
0.9
1.2
1.5
6 8 10 12 14 16 18 20 22+
1992
2001
Diameter Class (inches)
Bill
ion
cu
. ft.
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Volume Trends
Live hardwoods on timberland by diameter class
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
6 8 10 12 14 16 18 20 22+
1992
2001
Diameter Class (inches)
Bill
ion
cu
. ft.
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Growth and Removal Trends
Softwoods ~ growing stock
0.00
50.00
100.00
150.00
200.00
250.00
300.00
350.00
1957-66 1966-77 1977-86 1986-92 1992-01
Net growth Removals
Mill
ion
cu
. ft.
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Growth and Removal Trends
Hardwoods ~ growing stock
0.00
130.00
260.00
390.00
520.00
650.00
1957-66 1966-77 1977-86 1986-92 1992-01
Net growth Removals
Mill
ion
cu
. ft.
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Mortality Trends
0.00
30.00
60.00
90.00
120.00
150.00
1957-67 1967-77 1977-86 1986-92 1992-02
Softwood Hardwood
Mill
ion
cu
. ft.
Softwoods & Hardwoods ~ Growing stock
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Net Annual Growth and Removals ~ 2001
Softwoods ~ all live
0.00
50.00
100.00
150.00
200.00
250.00
National forest Other public NIPF Forest industry
Growth
Removals
Ownership
Mill
ion
cu
. ft.
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Net Annual Growth and Removals ~ 2001
Hardwoods ~ all live
0.00
100.00
200.00
300.00
400.00
500.00
600.00
National forest Other public NIPF Forest industry
Growth
Removals
Ownership
Mill
ion
cu
. ft.
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Down Woody MaterialDown Woody Material2001 Data2001 Data
0.0
5.0
10.0
15.0
20.0
25.0
CWD
FWD
Total by Plot
To
ns
/ a
cre
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Summary*Timberland Acreage – 1% decrease
*Volume – 4% increase
*Net GrowthSoftwoods – 7% decreaseHardwoods – 17% increase
*RemovalsSoftwoods – 14% increaseHardwoods – 5% increase
*MortalitySoftwoods – 105% increaseHardwoods – 25% increase
*Down Woody Material – new information to be included