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Table 1 Structural features measured in oak trees of different defoliation degrees (high- and low-defoliation trees were defined as those with a crown cover lower or higher than 50 %, respectively)

From: Prior height, growth, and wood anatomy differently predispose to drought-induced dieback in two Mediterranean oak speciesk

Variables

Holm oak (Quercus ilex)

Portuguese oak (Quercus faginea)

High defoliation

Low defoliation

High defoliation

Low defoliation

No. trees

20

30

10

15

Diameter at 1.3 m, dbh (cm)

8.7 ± 0.5

8.7 ± 0.4

11.3 ± 0.6

11.7 ± 1.7

Height (m)

3.6 ± 0.2a

4.4 ± 0.2b

4.2 ± 0.4a

5.1 ± 0.1b

No. stems per tree

9 ± 1

9 ± 1

4 ± 1

3 ± 1

Defoliation (%)

75 ± 4 b

14 ± 2 a

81 ± 5 b

15 ± 3 a

  1. Values are means ± SE. Different letters indicate significant differences between defoliation classes within each species (P < 0.05; Mann-Whitney U test)
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Annals of Forest Science

ISSN: 1297-966X