The Subalpine is the region which mainly determines the manner
of life of the population of the Alps. On a rough estimate
we may reckon that, of the space lying between the summits
of the Alps and the low country on either side, one-quarter
is available for cultivation, of which about one-half may
be vineyards and corn-fields, while the remainder produces
forage and grass. About another quarter is utterly barren,
consisting of snow-fields, glaciers, bare rock, lakes and
the beds of streams. There remains about one-half, which
is divided between forest and pasture, and it is the produce
of this half which mainly supports the relatively large
population. For a quarter of the year the flocks and herds
are fed on the upper pastures; but the true limit of the
wealth of a district is the number of animals that can be
supported during the long winter, and while one part of the
population is engaged in tending the beasts and in making
cheese and butter, the remainder is busy cutting hay and
storing up winter food for the cattle. The larger villages
are mostly in the mountain region, but in many parts of the
Alps the villages stand in the subalpine region at heights
varying from 4000 feet to 5500 feet above the sea, more rarely
extending to about 6000 feet The most characteristic feature
of this region is the prevalence of coniferous trees,
which, where they have not been artificially kept down, form
vast forests that cover a large part of the surface. These
play a most important part in the natural economy of the
country. They protect the valleys from destructive avalanches,
and, retaining the superficial soil by their roots, they
mitigate the destructive effects of heavy rains. In valleys
where they have been rashly cut away, and the waters pour
down the slopes unchecked, every tiny rivulet becomes a raging
torrent, that carries off the grassy slopes and devastates
the floor of the valley, covering the soil with gravel and
debris. In the pine forests of the Alps the prevailing
species are the common spruce and the silver fir; on siliceous
soil the larch flourishes, and surpasses every other European
species in height. The Scottish pine is chiefly found at a
lower level and rarely forms forests. The Siberian fir is
found scattered at intervals throughout the Alps but is not
common. The mughus, creeping pine, or Krummholz of the
Germans, is common in the Eastern Alps, and sometimes forms
on the higher mountains a distinct zone above the level of its
congeners. In the Northern Alps the pine forests rarely
surpass the limit of 6000 feet above the sea, but on the
south side they commonly attain 7000 feet, while the larch,
Siberian fir and mughus often extend above that elevation.
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