Full resolution (TIFF) - On this page / på denna sida - Some remarks upon the geographical distribution of vegetation in the colder Southern Hemisphere. By Carl Skottsberg. Botanist of the Swedish Antarctic Expedition 1901—1903. With 2 maps, tabl. 8 and 9. - General survey of the austral of or palæooceanic (Engler) realm. - II. The subantarctic dominion. - 1. District of subantarctic South America. - A. South Chilian—Fuegian Province.
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find the limit on the west side of the Cordillera somewhere between
47° and 50°. On the east side it is still more difficult to get a
boundary in Patagonia. Spegazzini (38, p. 486) divides the
Pata-gonian lowland into two zones, one from the Strait to 45° and the
second from 45° to the Argentine pampa. It does not seem likely
that the parallel of 45° forms a limit, at least according to Dusen
(16, p. 513). Matschie’s Zoological zone extends along the Cordillera
to Lake Titicaca, includes also the andine fauna (32, p. 8). In
short, it is clear enough that it must be impossible to get a well
marked limit on such a continent as South America, in fact difficult
to get any at all.
The subantarctic South America might properly be divided
into two provinces.
A. South Chilian—Fuegian Province.
This is the native country of one group of subantarctic forests.
The notes given below only concern Fuegia itself, where Nothofagus
betuloides forms the* evergreen and N. antarctica and Pumilio the
summergreen woods. As to the physiognomy and climate of these
two zones I might refer to my recent paper (36). But I was not
able then to closely investigate the limit between evergreen and
summergreen forests which, however, 1 am going to do now as far
as the territory I have investigated myself is concerned. Dusen
(16) has a map showing the distribution of evergreen and
summer-green forests and the zone destitute of wood. The boundary between
the two kinds of forest here runs from a point on the Atlantic coast
a little to the north of Cape S. Diego, to the westward north of
Lågo Fagnano and Admiralty Inlet, to the south of Punta Arenas
and from there to the NNW. Dusen does not feel sure that this
line is quite correct, but says (p. 391) that it perhaps must be
moved farther south, possibly as far as to the Beagle Channel.
And the same is said (p. 413-416) in connection with a brief
description of the forest round Punta Arenas and Ushuaia. During
my voyage I got an opportunity of following the boundary, and my
experience, completed and controlled by studies of the literature
and by information afforded by the inhabitants, was as follows:
The most eastern part of Fuegia and the whole of Staten Island
are covered with evergreen forest, and this prevails in the coastal
region until past Slogget Bay. In the interior we meet with
summer-green forests extending on the north east to the Atlantic Ocean.
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