Results of the pollen analysis of the Dyanushka peat sediments K7/P2 ...

• Main Authors: Werner, Kirstin, Tarasov, Pavel E, Andreev, Andrei A, Müller, Stefanie, Kienast, Frank, Zech, Michael, Zech, Wolfgang, Diekmann, Bernhard
• Format: Dataset
• Language: English
• Published: PANGAEA 2010
• Subjects: DEPTH, sediment/rock; AGE; Alnus fruticosa-type; Alnus glutinosa; Betula alba-type; Betula nana-type; Juniperus; Larix; Picea; Pinus pumila; Stomata pinaceae; Salix; Apiaceae; Artemisia; Asteraceae; Brassicaceae; Callitriche; Caryophyllaceae; Chenopodiaceae; Cichoriaceae; Cyperaceae; Drosera; Ephedra; Epilobium; Ericales; Indeterminata; Lamiaceae; Linum; Menyanthes trifoliata; Myriophyllum; Poaceae; Polygonum bistorta-type; Polygonum lapathifolium-type; Potamogeton; Ranunculaceae; Rosaceae; Rumex; Sanguisorba officinalis; Saxifraga; Scrofulariaceae; Sparganium; Thalictrum; Urtica; Botrychium; Botrychium lunaria-type; Equisetum; Huperzia; Lycopodium annotinum; Lycopodium clavatum; Polypodium; Betula nana; Botrychium lunaria; Dwarf birch; permafrost
• Online Access: https://dx.doi.org/10.1594/pangaea.716835; https://doi.pangaea.de/10.1594/PANGAEA.716835

A 415cm thick permafrost peat section from the Verkhoyansk Mountains was radiocarbon-dated and studied using palaeobotanical and sedimentological approaches. Accumulation of organic-rich sediment commenced in a former oxbow lake, detached from a Dyanushka River meander during the Younger Dryas stadial, at ~12.5 kyr BP. Pollen data indicate that larch trees, shrub alder and dwarf birch were abundant in the vegetation at that time. Local presence of larch during the Younger Dryas is documented by well-preserved and radiocarbon-dated needles and cones. The early Holocene pollen assemblages reveal high percentages of Artemisia pollen, suggesting the presence of steppe-like communities around the site, possibly in response to a relatively warm and dry climate ~11.4-11.2 kyr BP. Both pollen and plant macrofossil data demonstrate that larch woods were common in the river valley. Remains of charcoal and pollen of Epilobium indicate fire events and mark a hiatus ~11.0-8.7 kyr BP. Changes in peat properties, C31/C27 ... : Empty fields in Age column indicate an undated hiatus horizon. ...