Rit (Vísindafélag Íslendinga) - 01.08.1930, Blaðsíða 8

8
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TABLE II.
BIOLOGICAL SPECTRA FROM ÁSÓLFSSTAÐIR.
1-3 FOREST-LAND, AND 4 A SWAMP, CF. TABLE I.
1 2 3 4
Pointssum 1370 1790 1010 1120
Number of species .. 38 44 27 32
Density of species ... 13,7 17,9 10,1 11,2
A 26,3 26,3 19,8 33,0
E 73,7 73,7 81,2 67,0
A3 13,1 12,3 7,9 17,0
A2 7,3 6,2 2,9 10,7
Ai 5,1 7,8 9,9 5,4
E< 24,0 24,6 10,9 13,4
Es 17,0 21,8 30,9 32,1
E2 27,0 21,8 34,7 20,5
Ei 5,9 5,6 3,9 0,9
Ch 13,9 12,3 10,0 8,9
H 72,3 78,3 74,4 45,5
G 11,7 9,9 15,4 33,0
H H „ W M 8,1
Th 2,2 „ n 4,5
As only very liltle has been printed about the vegetation
of Icelandic forestland, it is difficult to get anything here for
comparison. The only previous observation, to which the
Raunkiær-method has been applied, is from Norðtunga in
Borgarfjörður, and made by H. Mölholm Hansen, Ph. D.
who published his results in his doctor’s dissertation: Studies
on the Vegetation of Iceland. I have compared his results
with my own observations.
As the table shows H are greatly predominating, which is
in full accordance with H. M. H. In Norðtunga H are 75,5°/o
and 74,4°/o, but here 72,3°/o, 78,3°/o and 74,4°/o. The Ch
percentage also agrees well in these two places. It is obvious i
that the higher up the mountain, the more we get of Ch,
yet the altitudinal difference is so small that it is probably
not quite safe to draw any conclusions therefrom. The differ-
ence in the number of the species is peculiar too, especially