Subalpine Belt

Subalpine Belt

 

a high natural belt in the mountains of temperate and subtropical latitudes, in which subalpine vegetation and climate predominate. The subalpine belt is located below the alpine belt and above the mountain-forest belt in humid regions and above the steppe-mountain belt in arid regions. The elevation of the belt depends on the latitude, the slope exposure, and the continentality of the climate. In the Alps and Western Caucasus the subalpine belt is located at 1,700–2,300 m, while in the southern Himalayas it is found at 3,200–4,000 m. At higher latitudes and in regions cooled by ocean currents, the belt is situated much lower; for example, in some places in the Kuril Islands it is found at sea level. The belt features mountain-meadow landforms, with tall-grass subalpine meadows on mountain-meadow soils. The heavy snow cover lasts six to eight months and inhibits the growth of woody vegetation. The subalpine belt usually has rich summer pastures.

IU. K. EFREMOV

References in periodicals archive ?
There, the subalpine belt is characterized by widespread conifer forests and related scrubs and grasslands, and gives way upwards to the alpine belt through the treeline ecotone.
From lowlands to the subalpine belt, they form secondary vegetation related to deforestation, or permanent units on rocky slopes, whereas in the alpine belt they mainly inhabit the most balanced habitats (flat areas and gentle slopes).
In most sectors, the decreasing trend was greater in the subalpine belt, and became sharper towards the alpine and the basal belts.
The endemic flora (Figure 7 down) gave also a humped response along the altitudinal gradient, but with respect to the whole flora, the endemics showed a somewhat symmetric pattern, with a moderate increase and sharper decrease along the gradient and with maxima at higher altitudes, well in the subalpine belt.
Geophytes, hydrophytes and chamaephytes maintained low representation through most of the gradient, but while geophytes and hydrophytes clearly decreased and eventually disappeared from mid subalpine belt to the summits, chamaephytes increased along the high mountain and reached a high percentage towards the summits (> 30%).
A subalpine belt of predominantly mountain birch merges 100-200 m downslope with coniferous forest of either Scots pine (Pinus sylvestris L.
In the subalpine belt, birch forms closed stands that regenerate vegetatively by trunk sprouts.
Luzulo italicae-Nardetum strictae is distributed in the subalpine belt of the calcareous central Apennines, and it is often in contact with Taraxaco apennini-Trifolietum thalii (Biondi & al.
This vegetation is distributed on the calcareous massifs of the central-southern Apennines, from the Sibillini to Pollino, mainly in the subalpine belt.
Brachypodium genuense grasslands found in the subalpine belt of the Sibillini mountains (Table 8) grow on calcareous slopes with moderate gradient, in fairly xeric stands, often with a southern exposure, and cover an altitudinal range between 1800 and 2100 m Brachypodium genuense shows high cover values, giving these grasslands a smooth and dense appearance.
The nitrophilous vegetation occurring in the subalpine belt is often correlated with overgrazing.
Carduetum chrysacanthi, described for the subalpine belt of the Laga massif (central Apennines, Pedrotti, 1981, 1982a) and found also in Campo imperatore (Gran Sasso, Biondi & al.