가사
Is cold anomaly a biotrigger or a life support for boreal Pleisto-
cene relict species?
In Soteska, Sava valley, Julian Alps, Slovenia a cold scree slope
sustains an unusual plant community, usually found at altitudes higher than 1500 m above sea level. Talus slope lies
close to the well-ventilated, glacier reshaped valley bottom,
with northern exposure. It is an overlit forest clearing, 2185
m2 in size, surrounded with thicker birch forest, with thick
undergrowth and scarce larch and spruce trees. Numerous
holes between rocks act as ventilation points, sucking cold air
in winter and emitting cold air, just above freezing, in the
warm part of the year.
Association of typically alpine species, various rhododendrons
(Rhododendron hirsutum, Rhodothamnus chamaecistus) and
European larch (Larix decidua) is uncommon at elevations between 490 and 590 m above sea level and is so far the only
such occurrence found in Slovenia. It is famous for being one
of the most southern European habitats of twinflower (Linnaea borealis), a flower presently mainly found in subarctic, boreal, or mountainous regions of the northern hemisphere.
Presence of twinflower and its habitat conservation was the
main reason for a project of ice temperature measurements
began in 2012. Air temperatures were measured in different
locations and different distances from the ground, in cold
anomaly and in the neighbouring forest. Presented temperature measurements will try to correlate the cold scree conditions with the peculiar habitat, give relation with possible ice
cave occurrence and act as base for protected area management, mainly regarding the interaction with critical infrastructure.
