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Table 2 Estimates of abundances and their percentages and of the relative standard errors for the tree species detected in the TOF of the Molise region. Species are listed in decreasing order of abundance

From: Inference on forest attributes and ecological diversity of trees outside forest by a two-phase inventory

Species

Abundance

RSE %

Abundance %

RSE %

Downy oak

1,067,453.40

29.27

20.83

25.07

Turkey oak

694,949.41

51.75

13.56

41.65

Field elm

683,408.13

27.66

13.34

24.59

Field maple

434,156.46

35.55

8.47

26.68

White willow

320,897.67

43.84

6.26

37.71

Tree of heaven

145,062.88

90.57

2.83

89.61

Common hawthorn

142,854.53

59.96

2.79

59.17

Manna ash

131,603.19

72.37

2.57

63.74

Black locust

129,487.82

70.45

2.53

63.15

Olive

106,275.62

57.49

2.07

56.26

Crab apple

96,318.64

49.17

1.88

49.33

Common holly

95,684.85

99.98

1.87

98.50

Wild pear

94,738.17

49.58

1.85

42.38

Black elderberry

91,774.76

86.35

1.79

83.67

Goat willow

77,503.00

72.21

1.51

70.49

Black poplar

76,348.63

52.26

1.49

49.64

Common walnut

75,570.33

65.65

1.47

65.99

White poplar

73,840.91

65.23

1.44

65.87

Sweet cherry

62,204.58

45.56

1.21

43.66

Laurustinus

55,151.29

99.98

1.08

98.82

Plum

50,464.63

80.69

0.98

80.69

European beech

49,009.31

99.98

0.96

98.50

Common fig

45,939.74

37.02

0.90

36.94

Blackthorn

37,456.87

62.60

0.73

60.11

Mastic tree

34,214.51

99.98

0.67

100.46

Common ash

29,341.35

99.98

0.57

100.40

Almond

24,992.54

51.61

0.49

51.85

European spindle

23,208.62

84.44

0.45

78.31

Purple willow

23,169.20

72.39

0.45

69.76

Common hazel

20,312.79

52.58

0.40

50.54

English oak

17,484.09

99.98

0.34

101.58

Common hornbeam

14,879.29

90.50

0.29

89.02

Service tree

12,347.58

59.43

0.24

53.06

Wild service tree

11,101.97

99.98

0.22

93.65

Oriental plane

6,663.72

99.98

0.13

101.73

Dogwood

6,121.93

70.99

0.12

65.64

Black alder

6,086.41

99.98

0.12

101.32

Sweet chestnut

5,759.65

99.98

0.11

99.99

Nettle tree

5,735.34

99.98

0.11

100.46

Apple tree

4,217.72

58.70

0.08

58.30

Maritime pine

4,121.14

99.98

0.08

101.40

Common laburnum

3,887.42

99.98

0.08

98.05

Arborvitae

3,268.57

79.97

0.06

82.04

Eurasian aspen

2,918.74

99.98

0.06

100.85

Arizona cypress

2,577.27

72.09

0.05

70.63

Sycamore maple

2,490.29

99.98

0.05

101.05

Oriental hornbeam

2,294.14

99.98

0.04

100.46

Narrow-leaved ash

2,060.57

99.98

0.04

101.40

Morello cherry

1,945.83

99.98

0.04

100.85

Aleppo pine

1,943.71

99.98

0.04

98.05

Christ’s thorn

1,850.48

99.98

0.04

99.73

Rosebay

1,665.93

99.98

0.03

101.73

Marasca sour cherry

1,546.98

99.98

0.03

97.26

Stone pine

1,484.66

99.98

0.03

101.64

White mulberry

1,484.66

99.98

0.03

101.64

Common pear

1,333.54

74.30

0.03

71.57

Peach

901.31

99.98

0.02

100.43

Holm oak

832.97

99.98

0.02

101.73

Italian maple

627.67

99.98

0.01

100.11

Kiwi

450.66

99.98

0.01

100.43