20081315 Ver 1_Appendix H_20120608

Appendix H-1. Jacks Creek Well 2 Herbs 2011.
Average percent cover
Average number of stems
Frequency of
Importance
Scientific name
(95% confidence interval)
(95% confidence interval)
occurrence
value
Berchemia scandens
0.05(n/a)
0.10(n/a)
0.1
0.2
Microstegium vimineum
13.00(-22.41-48.41)
2.50(10.47-15.53)
0.2
2
Arundinaria gigantea
1.80(-4.27-7.87)
0.40(0.79-2.81)
0.2
0.58
Sabal minor (clumps)
0.15(n/a)
0.10(n/a)
0.1
0.21
Appendix H-2. Jacks Creek Well 2 Shrubs 2011.
Average percent cover
Average number of stems
Frequency of
Importance
Scientific name
(95% confidence interval)
(95% confidence interval)
occurrence
value
Bignonia capreolata
0.50(n/a)
0.10(n/a)
0.1
0.64
Arundinaria gigantea
0.10(n/a)
0.10(n/a)
0.1
0.42
Berchemia scandens
0.50(n/a)
0.20(n/a)
0.1
0.81
Sabal minor (clumps)
0.70(-0.82-2.22)
0.20(0.20-0.20)
0.2
1.12
a Importance value is the sum of relative percent cover, relative density (stems per quadrat), and relative frequency of
occurrence. The relative values of these three factors are not shown on this table for brevity. The importance value can
theoretically range from 0.0 to 3.0.
Appendix H-3. Jacks Creek Well 3 Herbs 2011.
Scientific name
Average percent cover
(95% confidence interval)
Average number of stems
(95% confidence interval)
Frequency of
occurrence
Importance
valuea
Pluchea odorata
0.20(n/a)
0.20(n/a)
0.1
0.1
Baccharis halimifolia
0.50(-0.01-1.01)
0.20(0.20-0.20)
0.2
0.18
Polygonum punctatum
4.80(-6.54-16.14)
2.00(-1.55-5.55)
0.4
0.76
Microstegium vimineum
3.50(-4.09-11.09)
1.70(-1.84-5.24)
0.2
0.52
Symphyotrichum subulatum
7.40(1.51-13.29)
4.80(-1.71-11.31)
0.5
1.28
Sabal minor (clumps)
1.50(n/a)
0.10(n/a)
0.1
0.16
Appendix H-4. Jacks Creek Well 3 Shrubs 2011.
Scientific name
Average percent cover
(95% confidence interval)
Average number of stems
(95% confidence interval)
Frequency of
occurrence
Importance
value
Morelia cerifera
10.20(-13.61-34.01)
0.80 (-0.21-1.81)
0.4
1.07
Sabal minor (clumps)
3.50(-4.09-11.09)
0.30 (-0.21-0.81)
0.2
0.42
Baccharis halimifolia
3.50(-1.99-8.99)
1.40 (-0.40-3.20)
0.4
0.94
Toxicodendron radicans
1.70(-1.19-4.59)
0.30(0.30-0.30)
0.3
0.4
Ilex opaca
1.00(n/a)
0.10(n/a)
0.1
0.16
a Importance value is the sum of relative percent cover, relative density (stems per quadrat), and relative frequency of
occurrence. The relative values of these three factors are not shown on this table for brevity. The importance value can
theoretically range from 0.0 to 3.0.
Appendix H-5. Jacks Creek Well 5 Herbs 2011.
Average percent cover
Average number of stems
Frequency of
Importance
Scientific name
(95% confidence interval)
(95% confidence interval)
occurrence
value
Symphyotrichum subulatum
26.67(7.68-45.65)
19.17(7.99-30.34)
0.6
1.45
Pluchea odorata
6.00(0.44-11.56)
2.50(1.99-3.01)
0.2
0.33
Unknown sedge
15.00(5.50-24.50)
12.67(6.42-18.92)
0.3
0.83
Typha angustifolia
12.00(n/a)
4.00(n/a)
0.1
0.39
H-1

Appendix H-6. Jacks Creek Well 5 Shrubs 2011.
Average percent cover
Average number of stems
Frequency of
Importance
Scientific name
(95% confidence interval)
(95% confidence interval)
occurrence
value
Baccharis halimifolia
42.00(18.19-65.81)
2.80(2.20-3.40)
0.5
1.3
Sabal minor (clumps)
22.50(14.91-30.09)
1.00(1.00-1.00)
0.2
0.57
Iva frutescens
25.00(19.94-30.06)
6.50(2.96-10.04)
0.2
1.13
a Importance value is the sum of relative percent cover, relative density (stems per quadrat), and relative frequency of
occurrence. The relative values of these three factors are not shown on this table for brevity. The importance value can
theoretically range from 0.0 to 3.0.
Appendix H-7. Jacks Creek Well 7 Herbs 2011.
Scientific name
Average percent cover
(95% confidence interval)
Average number of stems
(95% confidence interval)
Frequency of
occurrence
Importance
value
Toxicodendron radicans
17.50(9.91-25.09)
7.50(5.98-9.02)
0.2
0.37
Fraxinus pennsylvanica
5.00(5.00-5.00)
1.00(1.00-1.00)
0.2
0.13
Smilax rotundifolia
2.75(0.47-5.03)
1.00(1.00-1.00)
0.2
0.11
Persea palustris
2.00(n/a)
1.00(n/a)
0.1
0.07
Arundinaria gigantea
15.67(7.79-23.55)
4.00(3.28-4.72)
0.3
0.31
Pluchea odorata
19.00(2.83-35.17)
6.33(1.57-11.10)
0.3
0.39
Baccharishalimifolia
1.88(0.74-3.01)
1.00(1.00-1.00)
0.2
0.1
Smilax bona-nox
5.67(3.48-7.85)
2.00(1.28-2.72)
0.3
0.19
Ilex opaca
2.00(n/a)
1.00(n/a)
0.1
0.07
Microstegium vimineum
13.75(6.28-21.22)
13.75(5.30-22.20)
0.4
0.53
Rubus trivialis
2.00(n/a)
1.00(n/a)
0.1
0.07
Juncus coriaceus
30.00(n/a)
3.00(n/a)
0.1
0.34
Polygonum punctatum
3.00(0.98-5.02)
2.50(0.98-4.02)
0.2
0.14
Eclipta prostrata
3.25(3.00-3.50)
3.50(2.99-4.01)
0.2
0.17
Appendix H-8. Jacks Creek Well 7 Shrubs 2011.
Scientific name
Average percent cover
(95% confidence interval)
Average number of stems
(95% confidence interval)
Frequency of
occurrence
Importance
value
Arundinaria gigantea
7.50(4.97-10.03)
4.50(3.99-5.01)
0.2
0.83
Campsis radicans
5.00(n/a)
1.00(n/a)
0.1
0.32
Carpinus americana
10.00(n/a)
1.00(n/a)
0.1
0.43
Fraxinus pennsylvanica
3.50(1.98-5.02)
1.00(1.00-1.00)
0.2
0.37
Sabal minor (clumps)
16.00(11.34-20.66)
2.00(2.00-2.00)
0.5
1.05
a Importance value is the sum of relative percent cover, relative density (stems per quadrat), and relative frequency of
occurrence. The relative values of these three factors are not shown on this table for brevity. The importance value can
theoretically range from 0.0 to 3.0.
Appendix H-9. Jacks Creek Well 9 Herbs 2011.
Scientific name
Average percent cover
(95% confidence interval)
Average number of stems
(95% confidence interval)
Frequency of
occurrence
Importance
value
Pluchea odorata
12.40(4.37-20.43)
4.40(1.46-7.34)
0.9
1.99
Pontederia cordata
1.50(n/a)
0.50(n/a)
0.1
0.23
Symphyotrichumsubulatum
3.50(-0.63-7.63)
0.40(-0.01-0.81)
0.3
0.45
Typha angustifolia
0.40(n/a)
0.20(n/a)
0.1
0.12
Carex lurida
1.00(n/a)
0.50(n/a)
0.1
0.2
H-2

Appendix H-10. Jacks Creek Well 9 Shrubs 2011.
Scientific name
Average percent cover
(95% confidence interval)
Average number of stems
(95% confidence interval)
Frequency of
occurrence
Importance
value
Sabal minor (clumps)
10.50(5.19-15.81)
1.50(0.37-2.63)
0.5
1.26
Baccharis halimifolia
5.50(0.84-10.16)
0.60(0.28-0.92)
0.5
0.73
Iva frutescens
4.50(2.71-6.29)
0.40(0.40-0.40)
0.4
0.56
Morelia cerifera
4.10(-0.98-9.18)
0.30(0.30-0.30)
0.3
0.45
a Importance value is the sum of relative percent cover, relative density (stems per quadrat), and relative frequency of
occurrence. The relative values of these three factors are not shown on this table for brevity. The importance value can
theoretically range from 0.0 to 3.0.
Appendix H-11. Jacobs Creek Herbs 2011.
Scientific name
Average percent cover
(95% confidence interval)
Average number of stems
(95% confidence interval)
Frequency of
occurrence
Importance
valuea
Microstegium vimineum
0.50(-0.76-1.76)
0.50(-0.63-1.63)
0.1
0.37
Bignonia capreolata
0.03(-0.04-0.09)
0.10(-0.20-0.25)
0.1
0.17
Carex intumescens
8.20(-4.84-21.24)
1.10(6.67-9.73)
0.3
1.58
Berchemia scandens
0.05(-0.07-0.17)
0.10(-0.18-0.28)
0.1
0.17
Arundinaria gigantea
1.70(-1.67-5.07)
0.80(0.32-3.08)
0.2
0.72
Appendix H-12. Jacobs Creek Shrubs 2011.
Scientific name
Average percent cover
(95% confidence interval)
Average number of stems
(95% confidence interval)
Frequency of
occurrence
Importance
valuea
Vitis rotundifolia
2(n/a)
0.1(n/a)
0.1
0.21
a Importance value is the sum of relative percent cover, relative density (stems per quadrat), and relative frequency of
occurrence. The relative values of these three factors are not shown on this table for brevity. The importance value can
theoretically range from 0.0 to 3.0.
Appendix H-13. Drinkwater Well 1C Herbs 2011.
Scientific name
Average percent cover
(95% confidence interval)
Average number of stems
(95% confidence interval)
Frequency of
occurrence
Importance
valuea
Arundinaria gigantea
27.00(17.89-36.11)
13.00(20.97-33.03)
0.9
1.44
Smilax bona-nox
0.05(-0.06-0.16)
0.30(-0.63-0.73)
0.1
0.04
Campsis radicans
0.30(-0.18-0.78)
0.30(-0.18-0.78)
0.2
0.08
Euonymus americanus
0.05(-0.06-0.16)
0.10(-0.18-0.28)
0.1
0.03
Mitchella repens
0.05(-0.06-0.16)
1.50(-3.34-3.44)
0.1
0.09
Glyceriastriata
3.40(-2.25-9.05)
3.40(-1.21-8.01)
0.3
0.3
Smilax rotundifolia
0.90(-0.43-2.23)
0.90(0.11-1.69)
0.5
0.2
Vitis rotundifolia
0.10(-0.05-0.25)
0.40(-0.59-0.79)
0.2
0.07
Toxicodendron radicans
3.75(-4.11-11.61)
2.00(-0.04-7.54)
0.4
0.28
Microstegium vimineum
2.50(-3.16-8.16)
1.80(-1.57-6.57)
0.1
0.16
Boehmeria cylindrica
1.50(-1.89-4.89)
0.40(0.60-2.40)
0.1
0.08
Rubus argutus
0.20(-0.25-0.65)
0.10(-0.03-0.43)
0.1
0.04
Parthenocissus quinquefolia
0.30(-0.38-0.98)
0.10(0.07-0.53)
0.1
0.04
Quercus michauxii
0.20(-0.10-0.50)
0.30(-0.28-0.68)
0.2
0.07
Dichanthelium laxifolium
0.10(-0.13-0.33)
0.10(-0.13-0.33)
0.1
0.03
Vaccinium corymbosum
0.30(-0.42-1.02)
0.10(0.07-0.53)
0.1
0.04
H-3

Appendix H-14. Drinkwater Well 1C Shrubs 2011.
Average percent cover
Average number of stems
Frequency of
Importance
Scientific name
(95% confidence interval)
(95% confidence interval)
occurrence
value
Vaccinium corymbosum
1.50(-1.89-4.89)
0.10(-0.13-0.36)
0.1
0.43
Arundinaria gigantea
3.00(-0.02-6.02)
1.90(-0.11-4.23)
0.4
1.86
Smilax rotundifolia
0.50(-0.63-1.63)
0.10(-0.13-0.36)
0.1
0.27
Fraxinus profunda
1.00(-1.26-3.26)
0.30(-0.38-1.09)
0.1
0.43
a Importance value is the sum of relative percent cover, relative density (stems per quadrat), and relative frequency of
occurrence. The relative values of these three factors are not shown on this table for brevity. The importance value can
theoretically range from 0.0 to 3.0.
Appendix H-15. Tooley Creek Well 1 Herbs 2011.
Average percent cover
Average number of stems
Frequency of
Importance
Scientific name
(95% confidence interval)
(95% confidence interval)
occurrence
value
Arundinaria gigantea
2.00(n/a)
1.10(n/a)
0.1
0.83
Toxicodendron radicans
0.60(-1.42-2.62)
0.20(0.60-0.60)
0.2
0.54
Pluchea odorata
6.50(-1.09-14.09)
1.40(4.48-8.52)
0.2
1.63
Appendix H-16. Tooley Creek Well 1 Shrubs 2011.
Scientific name
Average percent cover
(95% confidence interval)
Average number of stems
(95% confidence interval)
Frequency of
occurrence
Importance
value
Quercus laurifolia
2.00(n/a)
0.20(n/a)
0.1
0.43
Vitis rotundifolia
5.00(2.47-7.53)
0.70(0.31-1.15)
0.5
1.45
Arundinaria gigantea
0.30(n/a)
0.20(n/a)
0.1
0.26
Toxicodendron radicans
2.00(-3.06-7.06)
0.40(-0.61-1.57)
0.2
0.65
Berchemia scandens
0.50(n/a)
0.10(n/a)
0.1
0.21
a Importance value is the sum of relative percent cover, relative density (stems per quadrat), and relative frequency of
occurrence. The relative values of these three factors are not shown on this table for brevity. The importance value can
theoretically range from 0.0 to 3.0.
Appendix H-17. Tooley Creek Well 3 Herbs 2011.
Average percent cover
Average number of stems
Frequency of Importance
Scientific name
(95% confidence interval)
(95% confidence interval)
occurrence value
Symphyotrichum subulatum
5.50(2.97-8.03)
1.40(2.46-8.54)
0.2
1.46
Pluchea odorata
3.40(-1.14-7.94)
1.10(1.60-5.20)
0.3
1.28
Baccharis halimifolia
0.50(n/a)
0.10(n/a)
0.1
0.26
Appendix H-18. Tooley Creek Well 3 Shrubs 2011.
Average percent cover
Average number of stems
Frequency of
Importance
Scientific name
(95% confidence interval)
(95% confidence interval)
occurrence
value
Baccharis halimifolia
8.00(0.55-15.45)
0.30(0.30-0.30)
0.3
1.14
Sabal minor
10.00(-0.93-20.93)
0.70(0.29-1.18)
0.3
1.61
Persea palustris
0.20(n/a)
0.10(n/a)
0.1
0.24
a Importance value is the sum of relative percent cover, relative density (stems per quadrat), and relative frequency of
occurrence. The relative values of these three factors are not shown on this table for brevity. The importance value can
theoretically range from 0.0 to 3.0.
H-4

Appendix H-19. Long Creek Well 2B Herbs 2011.
Scientific name
Average percent cover
(95% confidence interval)
Average number of stems
(95% confidence interval)
Frequency of
occurrence
Importance
value
Microstegium vimineum
3.30(-3.44-10.04)
4.10(-4.58-11.18)
0.2
0.66
Carex intumescens
0.08(-0.09-0.24)
0.60(-1.28-1.43)
0.1
0.1
Fimbristylis spathacea
0.03(-0.03-0.08)
0.10(-0.20-0.25)
0.1
0.05
Arundinaria gigantea
5.90(-5.37-17.17)
4.70(-2.18-13.98)
0.2
0.9
Smilax glauca
0.03(-0.03-0.08)
0.10(-0.20-0.25)
0.1
0.05
Persea palustris
0.10(-0.13-0.33)
0.20(-0.35-0.55)
0.1
0.07
Smilax bona-nox
0.03(-0.03-0.08)
0.10(-0.20-0.25)
0.1
0.05
Quercus nigra
0.10(-0.13-0.33)
0.10(-0.13-0.33)
0.1
0.06
Vaccinium corymbosum
2.00(-2.52-6.52)
0.10(1.77-2.23)
0.1
0.2
Morella cerifera
0.15(-0.09-0.39)
0.30(-0.33-0.63)
0.2
0.12
Toxicodendron radicans
0.10(-0.13-0.33)
0.30(-0.58-0.78)
0.1
0.07
Samolus valerandi spp. parvif
0.30(-0.18-0.78)
0.70(-0.87-1.47)
0.2
0.16
Pluchea odorata
0.20(0.02-0.38)
0.40(-0.17-0.57)
0.4
0.21
Hydrocotyle verticillata
0.05(-0.06-0.16)
0.30(-0.63-0.73)
0.1
0.07
Mikania scandens
0.10(-0.13-0.33)
0.10(-0.13-0.33)
0.1
0.06
Gelsemium sempervirens
0.50(-0.63-1.63)
0.10(0.27-0.73)
0.1
0.09
Rubus argutus
0.50(-0.69-1.69)
0.10(0.27-0.73)
0.1
0.09
Appendix H-20. Long Creek Well 2B Shrubs 2011.
Scientific name
Average percent cover
(95% confidence interval)
Average number of stems
(95% confidence interval)
Frequency of
occurrence
Importance
value
Morella cerifera
13.50(4.73-22.27)
1.80(0.59-3.20)
0.6
1.78
Vitis rotundifolia
0.10(-0.13-0.33)
0.10(-0.13-0.36)
0.1
0.11
Vaccinium corymbosum
2.50(-3.16-8.16)
0.30(-0.38-1.09)
0.1
0.31
Smilax rotundifolia
0.60(-0.53-1.73)
0.20(-0.10-0.55)
0.2
0.25
Smilax laurifolia
0.10(-0.13-0.33)
0.10(-0.13-0.36)
0.1
0.11
Toxicodendron radicans
0.50(-0.63-1.63)
0.10(-0.13-0.36)
0.1
0.13
Ilex glabra
1.00(-1.26-3.26)
0.10(-0.13-0.36)
0.1
0.16
Persea palustris
0.70(-0.88-2.28)
0.10(-0.13-0.36)
0.1
0.14
a Importance value is the sum of relative percent cover, relative density (stems per quadrat), and relative frequency of
occurrence. The relative values of these three factors are not shown on this table for brevity. The importance value can
theoretically range from 0.0 to 3.0.
Appendix H-21. Huddles Cut West Prong Well 2 Herbs 2011.
Average percent cover
Average number of stems
Frequency of
Importance
Scientific name
(95% confidence interval)
(95% confidence interval)
occurrence
value
Toxicodendron radicans
35.25(5.81-64.69)
2.75(1.53-3.97)
1
2.04
Parthenocissus quinquefolia
6.25(-0.52-13.02)
1.25(0.18-2.32)
0.5
0.73
Smilax rotundifolia
1.25(-0.54-3.04)
0.25(-0.11-0.61)
0.25
0.23
Appendix H-22. Huddles Cut West Prong Well 2 Shrubs 2011.
Average percent cover
Average number of stems
Frequency of
Importance
Scientific name
(95% confidence interval)
(95% confidence interval)
occurrence
value
Corpus amomum
0.0625
0.0625
0.0625
0.0625
Morella cerifera
0.0625
0.0625
0.0625
0.0625
Berchemia scandens
0.0625
0.0625
0.0625
0.0625
Baccharis halimifolia
0.0625
0.0625
0.0625
0.0625
a Importance value is the sum of relative percent cover, relative density (stems per quadrat), and relative frequency of
occurrence. The relative values of these three factors are not shown on this table for brevity. The importance value can
theoretically range from 0.0 to 3.0.
H-5

Appendix H-23. Huddles Cut West Prong Well 4 Herbs 2011.
Scientific name
Average percent cover
(95% confidence interval)
Average number of stems
(95% confidence interval)
Frequency of
occurrence
Importance
value
Eupatorium capillifolium
2.63(1.04-4.21
1.75(1.07-2.43)
0.4
0.32
Morella cerifera
1.00(n/a)
3.00(n/a)
0.1
0.24
Pluchea odorata
41.29(16.83-65.74)
4.71(3.08-6.35)
0.7
1.02
Cyperus odoratus
15.00(8.80-21.20)
1.33(0.92-1.75)
0.3
0.37
Toxicodendron radicans
30.00(n/a)
2.00(n/a)
0.1
0.46
Baccharis halimifolia
6.50(2.96-10.04)
1.50(0.99-2.01)
0.2
0.25
Polygonum pensylvanicum
2.00(0.99-3.01)
1.50(0.99-2.01)
0.2
0.2
Rosa palustris
4.00(n/a)
1.00(n/a)
0.1
0.15
Appendix H-24. Huddles Cut West Prong Well 4 Shrubs 2011.
Scientific name
Average percent cover
(95% confidence interval)
Average number of stems
(95% confidence interval)
Frequency of
occurrence
Importance
value
Ulmus americana
0.08(-0.45-2.05)
0.20(-0.10-0.50)
0.2
1.07
a Importance value is the sum of relative percent cover, relative density (stems per quadrat), and relative frequency of
occurrence. The relative values of these three factors are not shown on this table for brevity. The importance value can
theoretically range from 0.0 to 3.0.
Appendix H-25. Huddles Cut West Prong Well 7 Herbs 2011.
Scientific name
Average percent cover
(95% confidence interval)
Average number of stems
(95% confidence interval)
Frequency of Importance
occurrence value
Toxicodendron radicans
2.30(-0.68-5.28)
1.10(-0.53-2.73)
0.3
0.22
Baccharis halimifolia
2.50(-0.81-5.81)
1.20(0.26-2.14)
0.5
0.29
Rubus argutus
0.50(-0.63-1.63)
0.10(-0.13-0.33)
0.1
0.05
Eupatorium capillifolium
3.25(2.31-8.81)
1.70(-0.59-3.99)
0.4
0.32
Hydrocotyle verticillata
0.20(-0.25-0.65)
0.90(-1.14-2.94)
0.1
0.1
Pluchea odorata
10.40(1.27-19.53)
3.30(1.42-5.18)
0.9
0.76
Cyperus odoratus
3.00(-1.83-7.83)
0.80(-0.45-2.05)
0.2
0.19
Polygonum punctatum
10.70(0.91-20.49)
3.00(0.48-5.52)
0.5
0.62
Setariamagna
7.00(-4.71-18.71)
1.20(-1.27-3.67)
0.2
0.32
Pontederia cordata
1.00(-1.26-3.26)
0.50(-0.63-1.63)
0.1
0.09
Mikania scadens
0.10(-0.13-0.33)
0.10(-0.13-0.33)
0.1
0.04
Appendix H-26. Huddles Cut West Prong Well 7 Shrubs 2011.
Scientific name
Average percent cover
(95% confidence interval)
Average number of stems
(95% confidence interval)
Frequency of
occurrence
Importance
value
Rosa palustris
1.00(-1.26-3.26)
0.60(-0.76-1.96)
0.1
0.89
Mikania scandens
0.40(-0.50-1.30)
0.30(-0.38-0.98)
0.1
0.52
Toxicodendron radicans
1.00(-1.26-3.26)
0.30(-0.38-0.98)
0.1
0.69
Persea palustris
0.50(-0.63-1.63)
0.10(-0.13-0.33)
0.1
0.41
Morella cerifera
0.50(-0.63-1.63)
0.20(-0.25-0.65)
0.1
0.48
a Importance value is the sum of relative percent cover, relative density (stems per quadrat), and relative frequency of
occurrence. The relative values of these three factors are not shown on this table for brevity. The importance value can
theoretically range from 0.0 to 3.0.
H-6

Appendix H-27. Huddles Cut West Prong Well 8 Herbs 2011.
Scientific name
Average percent cover
(95% confidence interval)
Average number of stems
(95% confidence interval)
Frequency of
occurrence
Importance
value
Eupatorium capillifolium
4.75(-1.28-10.78)
4.70(-1.52-10.92)
0.7
1.16
Morella cerifera
0.35(-0.06-0.76)
0.80(-0.36-1.96)
0.3
0.23
Parthenocissus quinquefolia
0.05(-0.06-0.16)
0.10(-0.13-0.33)
0.1
0.05
Toxicodendron radicans
0.05(-0.06-0.16)
0.10(-0.13-0.33)
0.1
0.05
Glyceria striata
0.45(-0.27-1.17)
0.40(-0.20-1.00)
0.2
0.16
Mikania scandens
4.20(-3.63-12.03)
0.40(-0.10-0.90)
0.3
0.5
Saururus cernuus
0.65(-0.03-1.33)
1.10(-0.67-2.87)
0.4
0.33
Erechtites hieraciifolia
1.00(-1.26-3.26)
0.10(-0.13-0.33)
0.1
0.13
Acer rubrum
0.05(-0.06-0.16)
0.10(-0.13-0.33)
0.1
0.05
Smilax rotundifolia
0.05(-0.06-0.16)
0.10(-0.13-0.33)
0.1
0.05
Liriodendron tulipifera
0.50(-0.63-1.63)
0.60(-0.76-1.96)
0.1
0.14
Microstegium vimineum
0.10(-0.13-0.33)
0.80(-1.01-2.61)
0.1
0.13
Appendix H-28. Huddles Cut West Prong Well 8 Shrubs 2011.
Average percent cover
Average number of stems
Frequency of
Importance
Scientific name
(95% confidence interval)
(95% confidence interval)
occurrence
value
Ulmus americana
1.00(-1.26-3.26)
0.10(-0.13-0.33)
0.1
0.53
Fraxinus pennsylvanica
0.50(-0.63-1.63)
0.10(-0.13-0.33)
0.1
0.41
Berchemia scandens
2.70(-1.12-6.52)
0.90(-0.29-2.09)
0.3
2.06
a Importance value is the sum of relative percent cover, relative density (stems per quadrat), and relative frequency of
occurrence. The relative values of these three factors are not shown on this table for brevity. The importance value can
theoretically range from 0.0 to 3.0.
Appendix H-29. Porter Creek Well 5 Herbs 2011.
Scientific name
Average percent cover
(95% confidence interval)
Average number of stems
(95% confidence interval)
Frequencyof
occurrence
Importance
value
Quercus laurifolia
0.05(-0.06-0.16)
0.20(-0.40-0.50)
0.1
0.23
Smilax rotundifolia
0.80(-0.20-1.80)
0.70(-0.03-1.63)
0.3
1.06
Bignonia capreolata
0.65(-0.27-1.57)
1.00(-0.74-2.04)
0.3
1.12
Berchemia scandens
0.15(-0.19-0.49)
0.10(-0.08-0.38)
0.1
0.23
Persea palustris
0.30(-0.38-0.98)
0.20(-0.15-0.75)
0.1
0.36
Appendix H-30. Porter Creek Well 5 Shrubs 2011.
Average percent cover
Average number of stems
Frequency of
Importance
Scientific name
(95% confidence interval)
(95% confidence interval)
occurrence
value
Arundinaria gigantea
1.00(-1.26-3.26)
0.50(-0.63-1.81)
0.1
1.27
Carpinus caroliniana
3.50(-1.85-8.85)
0.20(-0.10-0.55)
0.2
1.73
a Importance value is the sum of relative percent cover, relative density (stems per quadrat), and relative frequency of
occurrence. The relative values of these three factors are not shown on this table for brevity. The importance value can
theoretically range from 0.0 to 3.0.
Appendix H-31. Porter Creek Well 9A Herbs 2011.
Average percent cover
Average number of stems
Frequency of
Importance
Scientific name
(95% confidence interval)
(95% confidence interval)
occurrence
value
Eclipta prostrata
0.30(0.30-0.30)
0.20(0.30-0.30)
0.2
0.48
Toxicodendron radicans
0.08(n/a)
0.10(n/a)
0.1
0.22
Quercus nigra
0.90(-2.64-4.44)
0.30(0.39-1.41)
0.2
0.65
Arundinaria gigantea
3.50(n/a)
1.80(n/a)
0.1
1.65
H-7

Appendix H-32. Porter Creek Well 9A Shrubs 2011.
Average percent cover
Average number of stems
Frequency of
Importance
Scientific name
(95% confidence interval)
(95% confidence interval)
occurrence
value
Arundinaria gigantea
1.00(1.00-1.00)
0.90(0.39-1.49)
0.2
1.02
Diospyros virginiana
4.00(4.00-4.00)
1.00(1.00-1.00)
0.2
1.59
Fraxinus pennsylvanica
0.80(n/a)
0.10(n/a)
0.1
0.39
a Importance value is the sum of relative percent cover, relative density (stems per quadrat), and relative frequency of
occurrence. The relative values of these three factors are not shown on this table for brevity. The importance value can
theoretically range from 0.0 to 3.0.
Appendix H-33. Duck Well 1B
Herbs 2011.
Average percent cover
Average number of stems
Frequency of
Importance
Scientific name
(95% confidence interval)
(95% confidence interval)
occurrence
value
Arundinaria gigantea
11.65(3.71-19.59)
6.70(7.76-15.54)
0.9
1.97
Glyceria striata
0.05(-0.06-0.16)
0.10(-0.18-0.28)
0.1
0.06
Mitchella repens
0.40(0.03-0.77)
1.70(-1.15-1.95)
0.5
0.41
Smilax rotundifolia
0.15(-0.09-0.39)
0.30(-0.33-0.63)
0.2
0.13
Woodwardia areolata
0.10(-0.05-0.25)
0.20(-0.20-0.40)
0.2
0.11
Osmunda cinnamomea
0.10(-0.13-0.33)
0.10(-0.13-0.33)
0.1
0.06
Leucothoe racemosa
0.05(-0.06-0.16)
0.10(-0.18-0.28)
0.1
0.06
Lyonia lucida
0.25(-0.10-0.60)
0.70(-0.71-1.21)
0.3
0.22
Appendix H-34. Duck Well 1B
Shrubs 2011.
Average percent cover
Average number of stems
Frequency of
Importance
Scientific name
(95% confidence interval)
(95% confidence interval)
occurrence
value
Smilax rotundifolia
0.10(-0.13-0.33)
0.10(-0.13-0.36)
0.1
0.53
Arundinaria gigantea
0.40(-0.29-1.09)
0.40(-0.29-1.20)
0.2
1.61
Vaccinium corymbosum
0.40(-0.50-1.30)
0.10(-0.13-0.36)
0.1
0.86
a Importance value is the sum of relative percent cover, relative density (stems per quadrat), and relative frequency of
occurrence. The relative values of these three factors are not shown on this table for brevity. The importance value can
theoretically range from 0.0 to 3.0.
Appendix H-35. Duck Well 2A Herbs 2011.
Scientific name
Average percent cover
(95% confidence interval)
Average number of stems
(95% confidence interval)
Frequency of
occurrence
Importance
value
Berchemia scandens
0.30(0.01-0.59)
0.90(-0.62-1.22)
0.5
0.25
Toxicodendron radicans
0.60(-0.11-1.31)
2.20(-1.94-3.14)
0.4
0.36
Smilax bona-nox
0.08(-0.05-0.20)
0.20(-0.23-0.38)
0.2
0.08
Sanicula canadensis
0.05(-0.06-0.16)
0.10(-0.18-0.28)
0.1
0.04
Smilax rotundifolia
0.60(-0.53-1.73)
0.20(0.30-0.90)
0.1
0.09
Vitis rotundifolia
0.05(-0.06-0.16)
0.20(-0.40-0.50)
0.1
0.05
Rubus flagellaris
0.05(-0.06-0.16)
0.10(-0.18-0.28)
0.1
0.04
Mitchella repens
0.20(-0.15-0.55)
0.70(-1.15-1.55)
0.2
0.14
Parthenocissus quinquefolia
0.10(-0.13-0.33)
0.10(-0.13-0.33)
0.1
0.05
Woodwardia areolata
0.23(-0.22-0.67)
0.80(-1.35-1.80)
0.2
0.15
Quercus michauxii
0.30(-0.05-0.65)
0.40(-0.20-0.80)
0.3
0.15
Acer rubrum
0.03(-0.03-0.08)
0.10(-0.20-0.25)
0.1
0.04
Liquidambar styraciflua
0.05(-0.06-0.16)
0.10(-0.18-0.28)
0.1
0.04
Arundinaria gigantea
8.40(-1.39-18.19)
4.10(4.26-12.54)
0.6
1.21
Lyonia lucida
0.20(-0.25-0.65)
0.70(-1.38-1.78)
0.1
0.11
Euonymus americanus
1.05(-1.33-3.43)
0.10(0.82-1.28)
0.1
0.12
Glyceria striata
0.10(-0.13-0.33)
0.10(-0.13-0.33)
0.1
0.05
Galium tinctorium
0.05(-0.06-0.16)
0.20(-0.40-0.50)
0.1
0.05
H-8

Appendix H-36. Duck Well 2A Shrubs 2011.
Scientific name
Average percent cover
(95% confidence interval)
Average number of stems
(95% confidence interval)
Frequency of
occurrence
Importance
value
Liquidambar styraciflua
2.00(-2.52-6.52)
0.10(-0.13-0.36)
0.1
3
a Importance value is the sum of relative percent cover, relative density (stems per quadrat), and relative frequency of
occurrence. The relative values of these three factors are not shown on this table for brevity. The importance value can
theoretically range from 0.0 to 3.0.
Appendix H-37. Duck Well 3A Herbs 2011.
Scientific name
Average percent cover
(95% confidence interval)
Average number of stems
(95% confidence interval)
Frequency of
occurrence
Importance
value
Woodwardia areolata
0.13(-0.03-0.28)
1.30(-1.69-1.94)
0.3
0.27
Microstegium vimineum
0.85(-0.10-1.80)
2.30(-1.31-3.01)
0.4
0.52
Smilax bona-nox
0.10(-0.05-0.25)
0.50(-0.81-1.01)
0.2
0.14
Eclipta prostrata
0.05(-0.06-0.16)
0.10(-0.18-0.28)
0.1
0.05
Glyceria striata
0.30(-0.18-0.78)
0.50(-0.47-1.07)
0.2
0.16
Carex intumescens
0.55(-0.35-1.45)
0.60(-0.35-1.45)
0.3
0.24
Toxicodendron radicans
0.05(-0.06-0.16)
0.30(-0.63-0.73)
0.1
0.08
Parthenocissus quinquefolia
0.10(-0.03-0.23)
0.30(-0.25-0.45)
0.3
0.15
Arundinaria gigantea
4.60(-5.56-14.76)
0.60(3.70-5.50)
0.2
0.71
Galium tinctorium
0.05(-0.06-0.16)
0.20(-0.40-0.50)
0.1
0.06
Acer rubrum
0.18(-0.16-0.51)
0.40(-0.52-0.87)
0.2
0.14
Fimbrystilis spathacea
0.80(-0.41-2.01)
0.40(0.20-1.40)
0.2
0.21
Rubus argutus
0.10(-0.13-0.33)
0.10(-0.13-0.33)
0.1
0.06
Morella cerifera
0.10(-0.13-0.33)
0.10(-0.13-0.33)
0.1
0.06
Berchemia scandens
0.03(-0.03-0.08)
0.10(-0.20-0.25)
0.1
0.05
Mitchella repens
0.03(-0.03-0.08)
0.10(-0.20-0.25)
0.1
0.05
Appendix H-38. Duck Well 3A Shrubs 2011.
Average percent cover
Average number of stems
Frequency of
Importance
Scientific name
(95% confidence interval)
(95% confidence interval)
occurrence
value
Morella cerifera
0.10(-0.13-0.33)
0.10(-0.13-0.36)
0.1
0.53
Arundinaria gigantea
0.60(-0.53-1.73)
0.40(-0.20-1.10)
0.2
1.83
Persea palustris
0.20(-0.25-0.65)
0.10(-0.13-0.36)
0.1
0.64
a Importance value is the sum of relative percent cover, relative density (stems per quadrat), and relative frequency of
occurrence. The relative values of these three factors are not shown on this table for brevity. The importance value can
theoretically range from 0.0 to 3.0.
Appendix H-39. Duck Creek Well 4B Herbs 2011.
Scientific name
Average percent cover
(95% confidence interval)
Average number of stems
(95% confidence interval)
Frequency of
occurrence
Importance
value
Smilax bona-nox
0.05(-0.06-0.16)
0.10(-0.18-0.28)
0.1
0.09
Mitchella repens
0.20(0.04-0.36)
2.90(-2.77-3.17)
0.5
0.79
Toxicodendron radicans
0.18(0.01-0.34)
0.90(-0.97-1.32)
0.4
0.43
Carex intumescens
0.30(-0.01-0.61)
0.80(-0.64-1.24)
0.4
0.52
Berchemia scandens
0.13(-0.07-0.32)
0.40(-0.48-0.73)
0.2
0.24
Bignonia capreolata
0.08(-0.01-0.16)
0.40(-0.43-0.58)
0.3
0.23
Euonymus americanus
0.05(-0.06-0.16)
0.30(-0.63-0.73)
0.1
0.12
Ilex opaca
0.05(-0.06-0.16)
0.20(-0.40-0.50)
0.1
0.11
Persea palustris
0.03(-0.03-0.08)
0.10(-0.20-0.25)
0.1
0.07
Galium tinctorium
0.05(-0.06-0.16)
0.10(-0.18-0.28)
0.1
0.09
Vitis rotundifolia
0.05(-0.06-0.16)
0.10(-0.18-0.28)
0.1
0.09
Unknown 2
0.05(-0.03-0.13)
0.20(-0.25-0.35)
0.2
0.15
Mikania scandens
0.03(-0.04-0.09)
0.10(-0.20-0.25)
0.1
0.07
H-9

Appendix H-40. Duck Creek Well 4B Shrubs 2011.
Scientific name
Average percent cover
(95% confidence interval)
Average number of stems
(95% confidence interval)
Frequency of
occurrence
Importance
value
Campsis radicans
0.30(-0.38-0.98)
0.10(-0.13-0.36)
0.1
0.09
a Importance value is the sum of relative percent cover, relative density (stems per quadrat), and relative frequency of
occurrence. The relative values of these three factors are not shown on this table for brevity. The importance value can
theoretically range from 0.0 to 3.0.
H-10