Table 3 Saguaro Wilderness Trees/ha, trees/ha by size classes, SDI and BA. Small trees are 5 cm to 2.5 cm dbh and large trees are >45 cm dbh. Data followed by different letters differ at p < 0.1. Different letters followed by a * show significant differences at p < 0.05.

Tree density (ha⁻¹)

980 (377)a

631 (268)b*

540 (191)b*

420 (75)b*

Mean dbh (cm)

25.3 (8.8)a

26.5 (9.1)a

27.2 (5.5)a

26.6 (9.1)a

Basal area (m²/ha)

38 (26)a

31 (16)a

26 (11)a

44 (25)a

Stand Density index

690 (296)a

574 (277)a

481 (190)a

713 (243)a

Small tree density (ha⁻¹)

726 (530)a

399 (330)b*

331(127)b*

146 (211)b*

Large tree density (ha⁻¹)

42 (51)a

29 (28)a

24 (16)a

82 (60)b*

Weibull shape

2.0 (0.4)

2.3 (0.7)

2.05 (2.1)

3.1 (3.1)

Weibull scale

26.7 (9.0)

28.7(10.2)

28.1 (3.4)

37.9 (8.9)

Shape/scale combined

a

a

b*

c*