ANNUAL OF SOFIA UNIVERSITY „ST. KLIMENT OHRIDSKF
FACULTY OF BIOLOGY
Book 2 - Botany
Volume 97, 2005
ANNUAIRE DE L’UNIVERSITE DE SOFIA „KLIMENT OHRIDSKI"
FACULTE DE BIOLOGIE
Livre 2 - Botanique
Tome 97, 2005
POLLEN DIAGRAM FROM LAKE MALKO SMRADLIVO,
CENTRAL RILA MOUNTAINS
SPASSIMIR TONKOV
Department of Botany, Faculty of Biology, 8 Dragan Tsankov Blvd, Sofia 1164
E-mail:
tonkov@biofac.uni-sofia.bgAbstract. Pollen analysis was conducted on a core 140 cm in length obtained from the
southern peaty shore of Lake Malko Smradlivo (2300 m a. s. 1.) in the Central Rila Mountains
(SW Bulgaria). The pollen stratigraphy indicated Subatlantic age of the sediments. The vegetation
reconstruction revealed distribution of groups of
Pinus mugo
among herb vegetation in the
subalpine belt and wide spread of coniferous forests composed of
Pinus рейсе
,
Pinus sylvestris
and
Picea abies
in the approaches to the lake. Two surface moss pollen samples collected from the
upper part of the coniferous belt were also analyzed. The find of pollen of
Ephedra fragilis-
type
in one of these samples suggests a present-day distribution of
Ephedra
species in the study area.
Key words',
pollen analysis, Subatlantic, surface samples, Lake Malko Smradlivo, Central Rila
Mountains
Mountain lakes are suitable sites for palaeoecological studies in attempt to
reconstruct past environmental changes as their sediments usually contain
sufficient quantity of well-preserved fossils such as pollen, plant macroremains,
diatoms, etc. (Reasoner et al., 2001).
During the last years a research programme was initiated focused on
palaeoecological investigation of lakes in the Rila Mountains (2925 m) aiming
at obtaining new detailed information on the vegetation development, climate
changes and human impact at mid- and high altitudes in postglacial time.
Pollen and plant macrofossil diagrams supplemented with radicarbon dates
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