Table 3 Absolute Abundance (N/ha) and proportional abundance (of the total, and in the zone) with respect to height strata of the registered species. High strata (7.20 – 9.00 m), medium strata (4.50 – 7.19 m) and low strata (< 4.50 m)

Strata I

N

N/ha⁻¹

Of the total

In the zone

  Acacia amentacea

9

19

5

31.03

  Acacia farnesiana

5

10

2.78

17.24

  Havardia pallens

7

15

3.89

24.14

  Parkinsonia texana

2

4

1.11

6.9

  Prosopis glandulosa

6

13

3.33

20.69

Sum

29

61

16.11

100

Strata II

N

N/ha

Of the total

In the zone

 Acacia amentacea

29

60

16.11

27.36

 Acacia farnesiana

10

21

5.56

9.43

 Acacia schaffneri

3

6

1.67

2.83

 Celtis pallida

6

13

3.33

5.66

 Cordia boissieri

1

2

0.56

0.94

 Diospyros palmeri

5

10

2.78

4.72

 Ebenopsis ebano

1

2

0.56

0.94

 Havardia pallens

26

54

14.44

24.53

 Parkinsonia texana

8

17

4.44

7.55

 Prosopis glandulosa

9

19

5

8.49

 Sideroxylon celastrinum

2

4

1.11

1.89

 Zanthoxylum fagara

6

13

3.33

5.66

Sum

106

221

58.89

100

Strata III

N

N/ha

Of the total

In the zone

 Acacia amentacea

3

6

1.67

6.67

 Acacia farnesiana

2

4

1.11

4.44

 Acacia schaffneri

6

13

3.33

13.33

 Celtis pallida

2

4

1.11

4.44

 Cordia boissieri

5

10

2.78

11.11

 Diospyros palmeri

5

10

2.78

11.11

 Forestiera angustifolia

3

6

1.67

6.67

 Guaiacum angustifolium

2

4

1.11

4.44

 Havardia pallens

2

4

1.11

4.44

 Parkinsonia texana

3

6

1.67

6.67

 Prosopis glandulosa

5

10

2.78

11.11

 Sideroxylon celastrinum

3

6

1.67

6.67

 Zanthoxylum fagara

4

8

2.22

8.89

Sum

45

91

25

100

Total sum

180

375

100

300