A multi-proxy Late-glacial palaeoenvironmental record from Lake Bled, Slovenia
Identifieur interne : 000725 ( Main/Exploration ); précédent : 000724; suivant : 000726A multi-proxy Late-glacial palaeoenvironmental record from Lake Bled, Slovenia
Auteurs : Maja Andric [Slovénie] ; Julieta Massaferro [Argentine] ; Ueli Eicher [Suisse] ; Brigitta Ammann [Suisse] ; Markus Christian Leuenberger [Suisse] ; Andrej Martincic ; Elena Marinova [Belgique] ; Anton Brancelj [Slovénie]Source :
- Hydrobiologia : (The Hague) [ 0018-8158 ] ; 2009.
Descripteurs français
- Pascal (Inist)
- Wicri :
- geographic : Slovénie.
- topic : Lac, Milieu aquatique.
English descriptors
- KwdEn :
Abstract
This study investigates the palaeoecological record (δ18O, δ13C, pollen, plant macrofossils, chironomids and cladocera) at Lake Bled (Slovenia) sedimentary core to better understand the response of terrestrial and aquatic ecosystems to Late-glacial climatic fluctuations. The multi-proxy record suggests that in the Oldest Dryas, the landscape around Lake Bled was rather open, presumably because of the cold and dry climate, with a trend towards wetter conditions, as suggested by an increase in tree pollen as well as chironomid and cladocera faunas typical for well-oxygenated water. Climatic warming at the beginning of the Late-glacial Interstadial at ca. 14,800 cal yr BP is suggested by an increase in the δ18O value, the appearance of Betula and Larix pollen and macrofossils, and a warmth-adapted chironomid fauna. With further warming at ca. 13,800 cal yr BP, broad-leaved tree taxa (Quercus, Tilia, Ulmus), Artemisia, and Picea increase, whereas chironomid data (Cricotopus B) suggest lowering of lake levels. After 12,800 cal yr BP (and throughout the Younger Dryas), the climate was colder and drier, as indicated by lower δ18O values, decline of trees, increase of microscopic charcoal, xerophytes and littoral chironomids. A warmer climate, together with the spread of broad-leaved tree taxa and a deeper, more productive lake, mark the onset of the Late-glacial/Holocene transition. These results suggest that terrestrial and aquatic ecosystems at Lake Bled were very dynamic and sensitive to Late-glacial climatic fluctuations.
Affiliations:
- Argentine, Belgique, Slovénie, Suisse
- Canton de Berne, Province du Brabant flamand
- Berne, Heverlee, Louvain
- Université de Berne
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Le document en format XML
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type="région" nuts="3">Canton de Berne</region></placeName><orgName type="university">Université de Berne</orgName><placeName><settlement type="city">Berne</settlement><region nuts="3" type="region">Canton de Berne</region></placeName></affiliation></author><author><name sortKey="Christian Leuenberger, Markus" sort="Christian Leuenberger, Markus" uniqKey="Christian Leuenberger M" first="Markus" last="Christian Leuenberger">Markus Christian Leuenberger</name><affiliation wicri:level="4"><inist:fA14 i1="03"><s1>Climate and Environmental Physics, Physics Institute, University of Bern, Sidlerstrasse 5</s1><s2>3012 Bern</s2><s3>CHE</s3><sZ>3 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>Suisse</country><placeName><settlement type="city">Berne</settlement><region type="région" nuts="3">Canton de Berne</region></placeName><orgName type="university">Université de Berne</orgName><placeName><settlement type="city">Berne</settlement><region nuts="3" type="region">Canton de 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Leuven, Celestijnenlaan 200E</s1><s2>3001 Leuven</s2><s3>BEL</s3><sZ>7 aut.</sZ></inist:fA14><country>Belgique</country><placeName><region type="province" nuts="2">Province du Brabant flamand</region><settlement type="town">Heverlee</settlement><settlement type="city">Louvain</settlement></placeName></affiliation></author><author><name sortKey="Brancelj, Anton" sort="Brancelj, Anton" uniqKey="Brancelj A" first="Anton" last="Brancelj">Anton Brancelj</name><affiliation wicri:level="1"><inist:fA14 i1="07"><s1>National Institute of Biology, Večna pot 111, P.B. 141</s1><s2>1101 Ljubljana</s2><s3>SVN</s3><sZ>8 aut.</sZ></inist:fA14><country>Slovénie</country><wicri:noRegion>1101 Ljubljana</wicri:noRegion></affiliation></author></analytic><series><title level="j" type="main">Hydrobiologia : (The Hague)</title><title level="j" type="abbreviated">Hydrobiologia : (Hague)</title><idno type="ISSN">0018-8158</idno><imprint><date when="2009">2009</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Hydrobiologia : (The Hague)</title><title level="j" type="abbreviated">Hydrobiologia : (Hague)</title><idno type="ISSN">0018-8158</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Aquatic environment</term><term>Chironomidae</term><term>Cladocera</term><term>Hydrobiology</term><term>Isotopes</term><term>Lakes</term><term>Pollen</term><term>Slovenia</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Lac</term><term>Slovénie</term><term>Isotope</term><term>Pollen</term><term>Hydrobiologie</term><term>Milieu aquatique</term><term>Chironomidae</term><term>Cladocera</term></keywords><keywords scheme="Wicri" type="geographic" xml:lang="fr"><term>Slovénie</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Lac</term><term>Milieu aquatique</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">This study investigates the palaeoecological record (δ<sup>18</sup>O, δ<sup>13</sup>C, pollen, plant macrofossils, chironomids and cladocera) at Lake Bled (Slovenia) sedimentary core to better understand the response of terrestrial and aquatic ecosystems to Late-glacial climatic fluctuations. The multi-proxy record suggests that in the Oldest Dryas, the landscape around Lake Bled was rather open, presumably because of the cold and dry climate, with a trend towards wetter conditions, as suggested by an increase in tree pollen as well as chironomid and cladocera faunas typical for well-oxygenated water. Climatic warming at the beginning of the Late-glacial Interstadial at ca. 14,800 cal yr BP is suggested by an increase in the δ<sup>18</sup>O value, the appearance of Betula and Larix pollen and macrofossils, and a warmth-adapted chironomid fauna. With further warming at ca. 13,800 cal yr BP, broad-leaved tree taxa (Quercus, Tilia, Ulmus), Artemisia, and Picea increase, whereas chironomid data (Cricotopus B) suggest lowering of lake levels. After 12,800 cal yr BP (and throughout the Younger Dryas), the climate was colder and drier, as indicated by lower δ<sup>18</sup>O values, decline of trees, increase of microscopic charcoal, xerophytes and littoral chironomids. A warmer climate, together with the spread of broad-leaved tree taxa and a deeper, more productive lake, mark the onset of the Late-glacial/Holocene transition. These results suggest that terrestrial and aquatic ecosystems at Lake Bled were very dynamic and sensitive to Late-glacial climatic fluctuations.</div></front></TEI><affiliations><list><country><li>Argentine</li><li>Belgique</li><li>Slovénie</li><li>Suisse</li></country><region><li>Canton de Berne</li><li>Province du Brabant flamand</li></region><settlement><li>Berne</li><li>Heverlee</li><li>Louvain</li></settlement><orgName><li>Université de Berne</li></orgName></list><tree><noCountry><name sortKey="Martincic, Andrej" sort="Martincic, Andrej" uniqKey="Martincic A" first="Andrej" last="Martincic">Andrej Martincic</name></noCountry><country name="Slovénie"><noRegion><name sortKey="Andric, Maja" sort="Andric, Maja" uniqKey="Andric M" first="Maja" last="Andric">Maja Andric</name></noRegion><name sortKey="Brancelj, Anton" sort="Brancelj, Anton" uniqKey="Brancelj A" first="Anton" last="Brancelj">Anton Brancelj</name></country><country name="Argentine"><noRegion><name sortKey="Massaferro, Julieta" sort="Massaferro, Julieta" uniqKey="Massaferro J" first="Julieta" last="Massaferro">Julieta Massaferro</name></noRegion></country><country name="Suisse"><region name="Canton de Berne"><name sortKey="Eicher, Ueli" sort="Eicher, Ueli" uniqKey="Eicher U" first="Ueli" last="Eicher">Ueli Eicher</name></region><name sortKey="Ammann, Brigitta" sort="Ammann, Brigitta" uniqKey="Ammann B" first="Brigitta" last="Ammann">Brigitta Ammann</name><name sortKey="Ammann, Brigitta" sort="Ammann, Brigitta" uniqKey="Ammann B" first="Brigitta" last="Ammann">Brigitta Ammann</name><name sortKey="Christian Leuenberger, Markus" sort="Christian Leuenberger, Markus" uniqKey="Christian Leuenberger M" first="Markus" last="Christian Leuenberger">Markus Christian Leuenberger</name><name sortKey="Christian Leuenberger, Markus" sort="Christian Leuenberger, Markus" uniqKey="Christian Leuenberger M" first="Markus" last="Christian Leuenberger">Markus Christian Leuenberger</name></country><country name="Belgique"><region name="Province du Brabant flamand"><name sortKey="Marinova, Elena" sort="Marinova, Elena" uniqKey="Marinova E" first="Elena" last="Marinova">Elena Marinova</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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