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The Forest Map of Spain 1:200,000. Methodology and analysis of general results - page 12 / 16

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The Forest Map of Spain 1:200,000

35

50% 45% 40% 35% 30% 25% 20% 15% 10% 5% 0%

50% 45% 40% 35% 30% 25% 20% 15% 10% 5% 0%

0123456 789

0123456 789

Figure 12. Areal distribution of evolution levels in subscle- rophyll type.

Figure 13. Areal distribution of evolution levels in sclerophyll type.

they have been joined together according to their simi- lar physiognomy. The results of the percentages of plant cover occupation in the different CST are set out in the following tables.

The main sets of High Mountain ype plant commu- nities are shown on Table 6. Dense high-mountain grasslands represent the largest area and are especially abundant in the Pyrenees and the Cantabrian Range; such herbaceous covers are dominated by a wide varie- ty of species of the genera Carex, Nardus, Festuca, Trifolium etc. Rocky and stony deserts (plant cover less than 5%) and semi-deserts (between 5 and 10%) reach the second position; their origin is mostly natural and they are very common in high mountain belts. The third group is made up of diverse broom-like scrubs (18.14%), with major prevalence of Cytisus purgans (= Cytisus oromediterraneus). Depending on the case, heathlands

Table 6. Main plant communities in the High mountain type and its area percentages

Dense, high mountain grassland

28.18

Rocky and stony deserts and semi-deserts

20.43

Broom-like scrubs

18.14

Mono- oligo- and multispecific heathlands

17.95

Other communities with prevalence

of Gramineae

6.49

Mono- and oligospecific thorny scrubs

3.79

Communities of Juniperus communis

2.21

Oligo- and multispecific non thorny scrubs

1.51

Communities of Juniperus sabina

and Juniperus communis

0.53

Others

0.77

High mountain type Plant community

% of area

(17.95%) are mostly dominated by Erica arborea, Erica vagans or Calluna vulgaris. Other grasslands include high lastonares (typical in southern mountain ranges in Spain, represented by genera Festuca, Agrostis, Trisetum, He- lictotrichon etc.) and estepas leñosas (mixtures of grasses and dwarf scrubs of genera Festuca, Helictotrichon, Agrostis, Arenaria, Thymus etc. The rest of groups in the phytocenose has percentages lower than 5%.

Within the Taiga-like ype (Table 7), largest occuring communities are Pinus sylvestris forests (46.59%); other

Table 7. Main plant communites in the Taiga-like type and area percentages

Taiga-like type Plant community

% of area

Pine forests (most dominant Pinus sylvestris) Dense high-mountain grassland Pine forests (most dominant Pinus uncinata) Broom-like scrubs (genera Cytisus and Genista) Mono- , oligo- , multispecific scrubs Monospecific and oligospecific thorny scrubs Oligospecific and multispecific heathlands Fir forests (most dominant Abies alba) Pine forests (most dominant Pinus nigra) Pastures Communities of Juniperus communis Communities of Juniperus sabina and Juniperus communis Communities of Juniperus sabina Mixed grassy-woody pastures Birch forests (most dominant Betula spp.) Communities of Juniperus thurifera as most dominant Fir forests (most dominant Abies pinsapo) Others

46.59 10.21 10.09 8.00 4.86 2.81 2.49 2.09 2.06 1.56 1.18

1.07 0.92 0.91 0.47

0.24 0.20 4.25

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