NDLI: Elevational gradients during the Late-Glacial/Holocene vegetational transition in southern Bulgaria

Content Provider	Springer Nature Link
Author	Stefava, Vania Lazarova, Maria Wright, Herbert E.
Copyright Year	2006
Abstract	The Late Glacial and early-Holocene vegetational history of a newly dated pollen and macrofossil diagram from Besbog, a cirque lake at 2250 m just above the forest limit in the Pirin Mountains of southwestern Bulgaria, is compared with a newly dated pollen diagram for the mire Shiroka Polyana at 1400 m in the conifer forest of the nearby Rhodope Mountains in order to investigate the chronology of major changes in the vegetation at different elevations. In the Lake Besbog record the non-arboreal pollen assemblage of the Late Glacial changed abruptly to that of Betula, Quercus and other deciduous types. The date for this change is about 11.6 ka cal b.p. The Quercus assemblage may be composed of pollen blown from intermediate elevations, to which deciduous forest had expanded because of higher summer temperatures related to high summer insolation. At Shiroka Polyana (1400 m) in the modern conifer belt, a similar change did not occur until about 8.8 ka cal b.p. The persistence of the dry steppe or steppe forest in the early Holocene at this lower site can also be attributed to high summer insolation. Thus as atmospheric temperature increased at the end of the Late Glacial, deciduous forests expanded first at intermediate elevations in the Pirin Mountains and only later in the Rhodope Mountains at lower elevations as summer insolation decreased.
Starting Page	333
Ending Page	343
Page Count	11
File Format	PDF
ISSN	09396314
Journal	Vegetation History and Archaeobotany
Volume Number	15
Issue Number	4
e-ISSN	16176278
Language	English
Publisher	Springer-Verlag
Publisher Date	2006-07-27
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Vegetation history Late Glacial Holocene Pirin Mountains Rhodope Mountains Bulgaria Anthropology Geology
Content Type	Text
Resource Type	Article
Subject	Plant Science Archeology (arts and humanities) Paleontology

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