The Botany of Iceland - 01.12.1930, Síða 25
STUDIES ON THE VEGETATION OF ICELAND
15
Table 2.
The Biological Spectra of West and East Greenland.
Pt n Ph Ch H G HH Th1)
W. Grl. 80°—83° N. Lat. VIII . . 2.9 69 > 31.9 53.6 10.1 4.3 »
76°—80° VII ... 5.5 109 > 31.2 52.3 11.0 4.6 0.9
71 °—76° — VI ... 5.4 149 » 30.2 51.7 12.8 4.0 1.3
69 °_7io Va ... 5.1 197 » 27.4 52.3 11.8 6.1 2.5
Disko Vb ... 7.5 214 » 25.7 53.3 12.1 6.1 2.8
66°—69° IV ... 6.0 233 » 25.8 51.1 9.9 9.0 4.3
64 “—66° — III ... 7.8 217 0.5 24.4 54.8 9.7 7.4 3.2
61 °—64° II ... 9.3 216 1.4 21.3 56.5 8.8 7.4 4.6
S. Grl. 61°—60° -610 I ... 11.4 236 1.3 18.6 54.2 10.6 7.6 7.6
E. Grl. (il° —65° N. Lat. II ... 9.2 153 > 22.9 60.1 9.2 4.6 3.3
Angmagsalik III ... 9.0 167 » 24.6 58.1 8.4 6.0 3.0
67° —70° N. Lat. IV ... 7.5 120 > 30.8 54.2 9.2 4.2 1.7
Scoresby Sound V 6.3 160 > 29.4 52.5 12.5 3.8 1.9
72o_760 N. Lat. VI ... 4.8 126 » 29.4 54.0 11.9 2.4 2.4
76°—81° VII ... 5.5 91 > 33.0 49.5 14.3 3.3 >
81 °—83° VIII ... 4.3 47 > 42.6 44.7 10.6 2,1 >
West Greenland 8.2 352 0.9 21.6 54.0 10.5 7.7 5.4
East Greenland .. 7.1 238 ’ 25.2 57.6 10.0 4.2 2.9
West Greenland. 7.3 1640 0.4 25.2 53.4 10.7 6.7 3.6
East Greenland .. 7.1 864 » 28.6 54.6 10.6 4.1 2.1
of fact, the chamaephyte percentage is considerably lower. According
to Raunkiær (1908), Tromso in (59—70° N. has a chamaephyte per-
centage of 10, and Vardo, in a still more northerly situation but
protected from the sea, has a chamaephyte percentage of c. 15.
It is thus beyond doubt that there is a connection
between the biological spectra and the current conditions
of the surrounding seas.
For the rest it is probably the temperature conditions which
have most influence on tlie composition on the flora, that is to say,
the annual mean temperature or more probabljr perhaps the tem-
perature conditions of the winter. Passing from the lowlands to
the highland, the annual mean temperature, as shown above, grows
*) In the tables the abbreviations are as follows: n: number of species, Pt:
Pteridopbytes, Ph: Phanerophytes, Ch: Chamaephytes, H: Hemicryptophytes, G:
Geophytes, HH: Helo- and Hydrophytes and Th: Therophytes.