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Table 1 Fire interval and fire scar seasonality statistics for Johns Mountain Wildlife Management Area, Georgia (JMT); Savage Gulf State Natural Area, Tennessee (SAV); and Angel Hollow, Kentucky (ANG), USA, sampled between 2017 and 2019 to reconstruct the characteristics of shortleaf pine historical fire regimes. Statistics are provided for the full period of record (All years) and sub-periods based on the timing of Euro-American settlement (EAS) and twentieth century fire exclusion. Fires = number of unique fire years, MFI = mean fire interval, SD = standard deviation of MFI, Range = range of fire interval length (years), WMI = Weibull median fire interval (years), LEI = lower exceedance interval (95%; years), UEI = upper exceedance interval (95%; years), Scarred = mean percentage of trees scarred during fire events (%), Scars = total number of fire scars, Identified = percentage of fire scars with determinable seasonality, n/a = not applicable

From: Revealing historical fire regimes of the Cumberland Plateau, USA, through remnant fire-scarred shortleaf pines (Pinus echinata Mill.)

 

All years

Pre-EAS

EAS

Fire exclusion

Site code:

JMT

SAV

ANG

JMT

SAV

ANG

JMT

SAV

ANG

JMT

SAV

ANG

Time period:

1673–1979

1659–2018

1740–2017

1673–1834

1659–1834

1740–1834

1834–1935

1834–1935

1834–1935

1935–1979

1935–2018

1935–2018

Fire regime characteristics

 Fires (n)

66

66

36

21

23

9

42

40

27

3

4

0

 MFI (yr)

3.4

3.7

4.1

5.3

4.4

5.0

2.3

2.5

3.8

6.0

13.7

n/a

 SD (yr)

3.8

4.8

2.2

6.0

4.9

2.9

1.3

1.6

1.9

n/a

16.0

n/a

 Range (yr)

1 to 26

1 to 32

1 to 11

1 to 26

1 to 21

2 to 11

1 to 6

1 to 8

1 to 8

3 to 9

3 to 32

n/a

 WMI (yr)

2.7

2.7

3.9

3.9

3.3

4.7

2.2

2.3

3.6

n/a

9.8

n/a

 LEI (yr)

0.7

0.6

1.7

0.8

0.7

2.1

0.9

0.9

1.7

n/a

2.0

n/a

 UEI (yr)

6.7

7.5

6.7

10.7

8.9

8.2

3.8

4.4

6.1

n/a

28.1

n/a

 Scarred (%)

13.5

11.6

16.5

16.1

10.0

18.2

13.2

10.6

16.0

27.9

28.2

0

Fire scar seasonality

 Scars (n)

130

144

98

40

41

12

82

92

86

8

12

0

 Identified (%)

54.2

56.8

60.2

62.5

61.0

50.0

50.0

53.3

61.6

60.0

75.0

n/a

  Dormant

90.1

72.2

79.7

100.0

92.0

33.3

82.9

71.4

84.9

100.0

22.2

n/a

  Early earlywood

1.4

1.2

11.9

0.0

0.0

50.0

2.4

2.0

7.5

0.0

0.0

n/a

  Middle earlywood

0.0

20.5

0.0

0.0

8.0

0.0

0.0

20.4

0.0

0.0

55.6

n/a

  Late earlywood

1.4

2.4

3.4

0.0

0.0

16.7

2.4

0.0

1.9

0.0

22.2

n/a

  Latewood

7.0

3.6

5.1

0.0

0.0

0.0

12.2

6.1

5.7

0.0

0.0

n/a