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The Forest Map of Spain 1:200,000. Methodology and analysis of general results - page 10 / 16

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The Forest Map of Spain 1:200,000

33

Table 2. Contingency table of areas according to climatic-structural types and vertical structure categories in peninsular Spain and the Balearic Islands

Climatic-structural types

Heights

High

mountain

Taiga

Deciduous Subsclerophyll Sclerophyll

Hyperxerophile

Intrazonal

I

0.00

59.08

56.37

42.56

31.50

9.31

28.84

II

0.10

3.83

2.11

25.82

32.71

17.89

8.69

III

0.51

2.62

4.03

5.31

8.50

5.50

4.06

IV

25.00

12.95

18.84

13.64

14.77

40.76

11.04

V

55.00

12.68

18.20

11.97

11.21

18.05

22.40

VI

17.29

8.71

0.34

0.13

0.03

0.05

0.53

VII

2.10

0.13

0.11

0.57

1.28

8.44

24.44

1

00

100

II: subarbore

ous. III: high

Total

VII: other structures.

100

100

100

100

100

scrubs. IV: medium scrubs. V: low scrubs.

VI: very low or cre

eping scrubs.

Deciduous presents prevalence of low EL, just above 51% with values between 0 and 3. A 27% has values bet- ween 5 and 9, and there is also a small but signifi- cant percentage (1.37%) of vegetation with levels 8 and 9.

In the case of Subsclerophyll (Fig. 12), almost 40% has levels between 5 and 8 whereas low mature plant covers (levels 0 to 3) appear with a little more than 30%.

Outstandingly mature vegetation (levels 5 to 9) re- presents just over 25% in Sclerophyll domain (Fig. 13). The most degraded or incipient areas (degrees 0 to 3) occupy almost 40%. A significant 0,87% has levels between 0 and 1, revealing severe problems of protec- tion against water erosion and therefore of desertifi- cation due to plant cover lack.

In the peninsular Hyperxerophile only 25.2% means high levels (4 to 7). At the opposite end, around 30% represents the most degraded or incipient vegetation (between 0 and 2), which has a low protection capacity against water erosion and is extremely vulnerable to desertification.

In the Canary Islands, the highest areal percentages of most mature plant covers can be found in Alize trade- winds forests (57.9% between values 5 and 9) and Extra Alize tradewinds forests types (53.1% between 5 and 9). Largest areas of low levels are located in Below potential forest belt (37% between values 0 and 2) and in Hyperxerophile (more than 60% between 0 and 1).

Plant communities occuring within each CST would form very long lists. In order to simplify the exposition

70% 65% 60% 55% 50% 45% 40% 35% 30% 25% 20% 15% 10% 5% 0%

70% 65% 60% 55% 50% 45% 40% 35% 30% 25% 20% 15% 10% 5% 0%

AH SB HB MB LB VL O

AH SB HB MB LB VL O

Figure 10. Areal distribution of the main vertical structure cate- gories within Subsclerophyll in continental Spain. AH: arboreous height. SH: subarboreous. HS: high scrub. MS: medium scrub. LB: low scrub. VL: very low or creeping scrub. O: other structu- re categories.

Figure 11. Areal distribution of the main vertical structure cate- gories within Sclerophyll Type in continental Spain and the Ba- learic Islands. AH: arboreous height. SH: subarboreous. HB: high scrub. MB: medium scrub. LB: low scrub. VL: very low or cree- ping scrub. O: other structure categories.

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