Fróðskaparrit - 01.07.2004, Side 140

138
NEWS AND PROGRESS 2004
1. Tað fer at kólna 2°C í Føroyum í
hesi øldini
3. Tað fer at hitna 2°C í Føroyum í hesi
øldini
I tí køldu framtíðarímyndini fara plan-
tusløg frá tí niðasta vakstrar beltinum við
heiðalyngi at verða hótt og fara at minka
munandi, um tey ikki fara at hvørva heilt,
men økið við arktiskum gróðri fer at økjast.
Verður tað hinvegin heitari í Føroyum, er
tað mest háfjallaplanturnar, sum verða hót-
tar, og serliga sløg, sum bert eru at fínna á
ovastu fjallatoppunum. Heitari vetrar fara
harumframt at órógva tað óvirkna tíðar-
skeiðið hjá plantum; tær byrja at vaksa um
veturin, um ov heitt verður. Um hetta
hendir ov ofta, missa tær mótstøðuførið
fyri frosti.
Ritgerðin fatar um fímm vísindaligar
greinir. Umframt greinirnar um vakstrar-
belti og árinið á útvald plantusløg fatar rit-
gerðin eisini um greinir um lívfrøðiligt
margfeldi, lívshættir, og yvirlit yvir plan-
tusamfeløgini í Føroyum.
will affect the climate in the Faroe Islands.
Due to a possible weakening of the North
Atlantic Current, it is difficult to predict
whether the climate in the Faroe Island will
be warmer or colder. Therefore two scenar-
ios are proposed. The first assumes a de-
crease in summer and winter temperature
of 2°C, and the second an increase in sum-
mer and winter temperature of 2°C.
In a cooling scenario, the most vulnera-
ble species are the species from low alti-
tude of the Calluna heath vegetation zone.
These species can be expected to migrate
downwards and the area with arctic vegeta-
tion will increase.
If the climate in the Faroe Islands should
become warmer, the species most threat-
ened are those, which are found with a lim-
ited distribution restricted to the uppermost
parts of the mountains.
Warmer winters reduce the probability
of frost injury to the plant but, at the same
time, this creates physiological problems
for over-wintering plants by prolonging
their metabolic activity in unfavourable
times. Some species gradually lose their
frost-hardiness when exposed to mild win-
ters.
The thesis includes five scientific papers.
Apart from a paper on vegetation zones and
one on the effects of climate change on se-
lected plant species, the thesis also in-
cludes one paper on the altitudinal varia-
tion of biodiversity of vascular plant
species, one on altitudinal variation of life-
forms, and a review paper on plant com-
munities in the Faroe Islands.