Skip to main content

Table 2 Relationship between by the basal area increment cm2/year during the 25-year period 1972 to 1997 and the four structure variables (symbols defined previously), expressed by the coefficients of a multiple linear regression, for the ten most common species, represented by at least 50 individuals. RSE = residual standard error; iba = average basal area increment cm2/year

From: Diversity and production in an Afromontane Forest

Species

N

iba

M

D

W

T

RSE

R2

Apodytes dimidiata

124

2.9

0.8420 ns

3.333c

0.8156 ns

0.3424 ns

3.089

0.51

Elaeodendron croceum

125

2.3

1.9731b

3.1575c

−0.5256 ns

−0.1873 ns

1.748

0.67

Curtisia dentata

303

3.4

1.4611a

3.389c

−0.1106 ns

1.131 ns

3.015

0.58

Gonioma kamassi

379

1.8

1.205 c

0.9251c

0.6956a

0.3578 ns

1.383

0.63

Nuxia floribunda

53

2.3

0.5292 ns

1.762 a

0.6324 ns

1.221 ns

1.736

0.68

Ocotea bullata

82

5.3

−0.3746 ns

6.6231b

−7.1909a

5.3022 ns

6.027

0.53

Olea capensis macrocarpa

569

8.7

−0.7417 ns

11.87c

0.5479 ns

2.824 ns

7.538

0.63

Podocarpus latifolius

292

5.3

0.4192 ns

6.286c

−1.235 ns

4.063b

3.957

0.69

Pterocelastrus tricuspidatus

142

6.7

0.6504 ns

7.1894c

5.0142a

1.4604 ns

5.010

0.68

  1. aat alpha = 0.05; bat alpha = 0.01; cat alpha 0.001