Ecological Archives A023-024-A1

Charles D. Canham, Nicole Rogers, Thomas Buchholz. 2013. Regional variation in forest harvest regimes in the northeastern United States. Ecological Applications 23:515–522. http://dx.doi.org/10.1890/12-0180.1

Appendix A. Forest statistics reported by the U.S. Forest Service Forest Inventory and Analysis program for the 19 states from Virginia and Kentucky north to Wisconsin and Maine.

Table A1. The FIA program posts periodic “evaluations” (summaries of data from plots sampled over a defined time period) for each state on its website at http://apps.fs.fed.us/fiadb-downloads/FIADB4_pop_estimates.html. The table below summarizes evaluations posted for periods between 2002 and 2008 for which estimates of both net growth and removals were available. The census intervals vary because of state-to-state differences in the timing of plot censuses. “Area” is total forestland area (106 ha). “Volume” is the aboveground volume of all live adult trees (106 m3). “Removals” is the total aboveground volume of all live adult trees harvested since the previous census. “Mortality” is the total aboveground volume of adult trees that died from causes other than removal since the previous census. “Net Growth” is the increase in total live adult tree volume in the plot during the census interval, minus loss from mortality (but not removals). For both the region as a whole and in all individual states except Illinois, Indiana, and Vermont, harvesting accounted for more mortality than all other causes combined (58% of all adult tree mortality for the region as a whole). Note that in the state of Maine, removals during the period of the 2003–2007 evaluation also exceeded net growth, and that for the region as a whole, removals equaled 57% of net growth.

State

Evaluation years

Area (million hectares)

Volume (million m3)

Net growth (million m3/yr)

Mortality (million m3 /yr)

Removals (million m3 / yr)

Connecticut

2003–2007

0.69

114.50

2.77

0.75

1.41

Delaware

2004–2008

0.14

24.42

1.01

0.17

0.21

Illinois

2004–2008

1.94

244.99

6.13

3.51

1.42

Indiana

2004–2008

1.92

277.09

9.87

2.79

2.49

Kentucky

2008

5.03

679.47

20.88

6.11

9.43

Maine

2003–2007

7.13

721.06

16.31

10.20

17.55

Maryland

2004–2008

1.01

183.18

5.52

1.65

1.98

Massachusetts

2003–2006

1.24

224.29

4.46

1.57

1.88

Michigan

2004–2008

8.02

893.47

21.67

9.64

10.54

New Hampshire

2002–2006

1.91

297.63

4.69

3.55

5.05

New Jersey

2004–2006

0.84

112.71

3.15

0.86

1.08

New York

2002–2006

7.64

1,112.10

19.79

9.59

9.59

Ohio

2002–2007

3.26

450.11

13.18

5.31

5.81

Pennsylvania

2003–2007

6.72

993.12

24.00

9.07

12.56

Rhode Island

2003–2007

0.14

21.99

0.60

0.08

0.15

Virginia

2007

6.42

937.17

28.26

8.32

22.00

Vermont

2003–2007

1.86

286.32

5.08

3.40

3.39

West Virginia

2004–2006

4.86

752.51

18.51

6.69

10.32

Wisconsin

2004–2008

6.76

658.13

17.61

7.88

10.18

Totals

67.5

8,984.3

223.5

91.1

127.1

 

Table A2. Summary statistics for FIA plots used in the analyses, by region and forest type.

No. plots

Average aboveground
biomass (mt/ha)

Standard deviation of
aboveground biomass (mt/ha)

Fraction of plots logged
during census interval

Average % of basal area
removed if logged

Standard deviation of
% of basal area removed

REGION

Maine

3092

65.4

49.0

5.7

42.9

28.9

NY and NE

1075

102.7

65.9

7.8

24.6

23.0

PA and MD

2176

107.1

68.7

7.7

28.6

24.3

Michigan

6218

70.6

52.5

8.5

34.8

29.4

Wisconsin

4501

63.5

49.8

6.9

36.2

29.2

IL, IN, and OH

1925

85.8

59.9

12.5

29.3

25.2

Kentucky

1359

86.4

58.5

11.0

36.6

25.4

Virginia

2262

95.2

66.0

7.3

53.4

34.0

FOREST TYPE

Spruce Fir

2243

46.6

36.5

11.4

41.0

28.0

Oak

8149

91.4

61.2

7.9

34.5

29.7

Northern Hardwood

8015

81.3

58.2

6.4

37.7

28.9


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