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Wyszukujesz frazę "Kisielienė, D." wg kryterium: Autor


Wyświetlanie 1-4 z 4
Tytuł:
Vegetation responses to climatic changes during the late glacial according to palaeobotanical data in western Lithuania : a preliminary results
Autorzy:
Kisieliene, D.
Stancikaite, M.
Merkevicius, A.
Namickiene, R.
Powiązania:
https://bibliotekanauki.pl/articles/1186082.pdf
Data publikacji:
2005
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
environmental changes
pollen and plant macroremains
Late Glacial
western Lithuania
Opis:
The organic-rich material has been studied from the bottom part of lacustrine sediments of the Lake Kasuciai, western Lithuania. Radiocarbon dates and palaeobotanical data showed that these sediments accumulated between 13,500 and 9000 14C yr BP. The Late Glacial interstadial is defined by the dominance of Characeae and accumulation of carbonate. The Bolling is characterized by the pioneer taxa and the communities of open habitats. During the Allerod pine replaced the light demanding taxa that show development of a closer woodland habitat and dryness of climate. The short period between Bolling and Allerod with increasing representation of Betula and plants typical for the highly eroded habitats could be correlated with Older Dryas. The onset of the Younger Dryas is marked by degradation of the forest cover and expansion of heliophytic grasses. Entire vegetation cover with birch and pine forest was settled during the Preborial. Formation of calcareous sediments and appearance of thermophilous taxa confirm the climatic amelioration.
Źródło:
Polish Geological Institute Special Papers; 2005, 16; 45--52
1507-9791
Pojawia się w:
Polish Geological Institute Special Papers
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Post-glacial vegetation and environment of the Labanoras Region, East Lithuania: implications for regional history
Autorzy:
Gaidamavičius, A.
Stančikaite, M.
Kisieliene, D.
Mažeika, J.
Gryguc, G.
Powiązania:
https://bibliotekanauki.pl/articles/2059149.pdf
Data publikacji:
2011
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
E Lithuania
post-glacial
environment
vegetation dynamics
plant macrofossil
pollen
Opis:
Multiproxy data (pollen, plant macrofossils, 14C dates and loss-on--ignition measurements) obtained from the Bevardis and Verpstinis lakes in the Labanoras area (East Lithuania) were used to reconstruct a vegetation history and to reveal major environmental features during post-glacial time. Biostratigraphical data indicates ongoing sedimentation in Verpstinis Lake since the final stages of the AllerÝd. The pollen data shows that Pinus-dominated forest flourished during the AllerÝd, while the Younger Dryas was characterized by open shrub/herb/grass vegetation with highly abundant Juniperus. These are evidences of severe climatic conditions in the area. The 14C data suggests that sedimentation started in Bevardis Lake with the onset of the Holocene. Picea immigrated into the Verpstinis Lake surroundings in the Late Glacial, just before 11 500 cal yr BP according to the palynological evidence. The expanding deciduous taxa, e.g., Corylus (ca. 10 200-10 000 cal yr BP), Alnus (8200-8000 cal yr BP), and broad-leaved species with Ulmus (ca. 10 000 cal yr BP), Tilia (7700-7400 cal yr BP) and Quercus (5200 cal yr BP), formed a dense mixed forest where Picea appeared at 7300-6800 cal yr BP. Both diagrams show only negligible human impact. It seems that natural factors were responsible for the formation of vegetation cover and environment in the study area throughout the post-glacial.
Źródło:
Geological Quarterly; 2011, 55, 3; 269-284
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The earliest Pleistocene interglacials in Lithuania in the context of global environmental changes
Autorzy:
Baltrūnas, V.
Zinkutė, R.
Šeirienė, V.
Katinas, V.
Karmaza, B.
Kisielienė, D.
Stakėnienė, R.
Pukelytė, V.
Powiązania:
https://bibliotekanauki.pl/articles/2059977.pdf
Data publikacji:
2014
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
environmental changes
geochemistry
magnetic susceptibility
palaeobotany
Early-Middle Pleistocene
Lithuania
Opis:
Investigations have been carried out in order to reconstruct the palaeoenvironmental changes during the earliest Pleistocene interglacials and to establish their relation to global environmental changes. Three sections in east Lithuania exposing the earliest Pleistocene lacustrine deposits lying between the Kalviai (Glacial B, Nidanian?) and Dzūkija (Sanian 1) and between Dzūkija (Sanian 1) and Dainava (Sanian 2) glacial deposits were selected for study. Until now the Šlavė-2 and Vindžiūnai-136 successions were considered to have formed during the Vindžiūnai (Augustovian?, Malopolanian) Interglacial and the Kudrė-915 succession during the Turgeliai (Cromerian IV, Ferdynandovian) Interglacial. Geochemical, palaeomagnetic, magnetic susceptibility, anisotropy of magnetic susceptibility and palaeobotanical proxies were applied to establish the cyclicity and dynamics of palaeoenvironmental change. The data obtained enable the subdivision of the section into units related to changes in the sedimentary environment. The Matuyama/Brunhes boundary and Jaramillo subchron of the Matuyama chron have been recognized in the Šlavė section. The results enable correction of the stratigraphic position of the sections studied. The sedimentation in the Šlavė section took place during the Early Pleistocene, while that at the Vindžiūnai-136 and Kudrė-915 took place during two different Middle Pleistocene interglacials.
Źródło:
Geological Quarterly; 2014, 58, 1; 145--162
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sedimentary environment changes during the Early-Middle Pleistocene transition as recorded by the Daumantai sections in Lithuania
Autorzy:
Baltrūnas, V.
Zinkutė, R.
Katinas, V.
Karmaza, B.
Šeirienė, V.
Kisielienė, D.
Taraškevičius, R.
Lagunavičienė, L.
Powiązania:
https://bibliotekanauki.pl/articles/2060022.pdf
Data publikacji:
2013
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Early-Middle Pleistocene
environmental changes
geochemistry
magnetic susceptibility
plant macroremains
Lithuania
Opis:
Two sections (Daumantai-1 and Daumantai-3) in East Lithuania expose Early-Middle Pleistocene lacustrine-alluvial, deposits which lie on a thin Neogene layer and on older Devonian rocks. They are overlain by glacigenic deposits. Geochemical, palaeomagnetic, magnetic susceptibility, plant macrofossil, and diatom investigations were performed to determine the changes in the sedimentary environment. Cluster analysis of the geochemical variables (10 major elements, 16 trace elements, total organic and inorganic carbon) revealed the element groups and factors. The lowermost units are characterized by a major influence of local material and significant fluctuations in heavy mineral content. These fluctuations might reflect short-term climate changes. The transitional units have more expressed trends, especially as regards the trace elements and Zr/Ti. The uppermost units are characterized by a slight influence of local material and small fluctuations in trace elements. The data analysed enable the subdivision of the section into units related to changes in sedimentary environment. The boundary of the Bruhnes/Matuyama reversal in the Daumantai-1 and Daumantai-3 sections was detected by palaeomagnetic studies and enables the stratigraphical correlation of these deposits.
Źródło:
Geological Quarterly; 2013, 57, 1; 45--60
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-4 z 4

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