Title Lateglacial and early Holocene environmental changes in northeastern Lithuania
Author Stancikaite, M.; Kisieliene, D.; Moe, D.; Vaikutiene, G.
Author Affil Stancikaite, M., Institute of Geology and Geography, Vilnius, Lithuania. Other: Institute of Geology and Geography, Lithuania; University of Bergen, Norway; Vilnius University, Lithuania
Source Quaternary International, 207(1-2), p.80-92, ; Pleistocene and Holocene palaeoenvironments and recent processes across NE Europe, Plateliai, Lithuania, May 27- June 2, 2007, edited by J. Satkunas and M. Stancikaite. Publisher: Elsevier, Oxford, United Kingdom. ISSN: 1040- 6182
Publication Date Oct. 1, 2009
Notes In English. 83 refs. GeoRef Acc. No: 307804
Index Terms algae; carbon isotopes; isotopes; lacustrine deposits; lake deposits; Pleistocene; pollen; Quaternary deposits; radioactive isotopes; sediments; Lithuania; Baltic region; C-14; carbon; Cenozoic; cores; diatoms; Europe; Holocene; lacustrine environment; lake sediments; late-glacial environment; loss on ignition; lower Holocene; microfossils; miospores; paleoenvironment; palynomorphs; Plantae; Preboreal; Quaternary; upper Pleistocene; upper Weichselian; Weichselian; Younger Dryas
Abstract Multiproxy data (pollen, diatoms, plant macrofossils, 14C and loss on ignition measurements) obtained from two cores (Petrasiunai and Juodonys) were used to reconstruct the pattern of Lateglacial and early Holocene environmental changes in NE Lithuania. The flourishing of open Pinus forest and presence of light-demanding taxa on poor unstable soils surrounding shallow water basins have been recorded from about 13,100-13,000 cal BP to 12,600 cal BP in the study area. After 13,000 cal BP, expansion of Betula dominated vegetation and increased abundance of cold-tolerant plants together with a simultaneous drop of water temperature indicates a short climate deterioration, tentatively correlated with the "Gerzensee oscillation". A sudden reduction of the forest cover and extensive development of grass-herb dominated landscape is suggestive of a regional expression of the Younger Dryas cooling, dated to 12,600-11,500 cal BP. Climate aridification resulted in a progressive lowering of the water level and subsequent overgrowth of the basins. Early Holocene vegetation changes show a pattern of forest development with dominance of spruce shortly after 11,500 cal BP. Based on palynological evidence and the presence of plant macrofossils (seeds and needles), early Holocene immigration of Picea sp. to Juodonys (9410 310 BP; Vs-1433) and Petrasiunai (9420 65 BP; TUa-6177 (DF2471)) is indicated. Further development of the vegetation cover indicates multiple flourishing of predominant open birch vegetation subsequently followed by pine- spruce forest development caused by Preboreal climate instability. The most prominent climate shift, e.g. drop of the temperature and humidity recorded shortly before 11,100 cal BP has been correlated with the "Preboreal Oscillation" (Bjorck, S., Rundgren, M., Ingolfsson, O., Funder, S., 1997. The Preboreal oscillation around the Nordic Seas: terrestrial and lacustrine responses. Journal of Quaternary Science 12, 455-465). Expansion of birch-predominant forest around shallow water basins has been identified during the Late Preboreal, after 11,100 cal BP.
URL http://hdl.handle.net/10.1016/j.quaint.2008.10.009
Publication Type conference paper or compendium article
Record ID 65004866