Plant macrofossil records from permafrost deposits of the Bykovsky Peninsula (NE Siberia), supplement to: Kienast, Frank; Schirrmeister, Lutz; Siegert, Christine; Tarasov, Pavel E (2005): Palaeobotanical evidence for warm summers in the East Siberian Arctic during the last cold stage. Quaternary Research, 63(03), 283-300

• Main Authors: Kienast, Frank, Schirrmeister, Lutz, Siegert, Christine, Tarasov, Pavel E
• Format: Dataset
• Language: English
• Published: PANGAEA - Data Publisher for Earth & Environmental Science 2017
• Subjects: Event label; Sample ID; Height above sea level; Sediment type; Stratigraphy; Age model; Age, dated; Age, dated, error to older; Age, dated, error to younger; Agrostis sp.; Allium schoenoprasum; Alopecurus sp.; Alyssum obovatum; Androsace septentrionalis; Arabis petrea; Eremogone capillaris; Artemisia sp.; Batrachium sp.; Betula exilis; Betula sect. Albae; Calamagrostis indeterminata; Callitriche hermaphroditica; Caltha palustris; Cardamine bellidifolia; Carex aquatilis; Carex cf. argunensis; Carex arctisibirica; Carex cespitosa; Carex duriuscula; Carex lugens; Carex cf. nardina; Carex sect. Phacocystis; Carex cf. spaniocarpa; Carex cf. stans; Carex sect. Temnemis; Carex sp.; Cassiope tetragona; Cerastium beeringianum; Cerastium jenissejense; Cerastium maximum; Cerastium regelii; Cerastium sp.; Chara sp.; Chenopodium sp.; Chenopodium glaucum; Cochlearia arctica; Deschampsia cespitosa agg.; Descurainia sophioides; Draba sp.; Dryas punctata; Eriophorum angustifolium; Eriophorum russeolum; Eriophorum scheuchzeri; Eriophorum vaginatum; Festuca sp.; Gastrolychnis apetala; Glaux maritima; Hippuris vulgaris; Hordeum brevisubulatum; Juncus biglumis; Kobresia myosuroides; Kobresia simpliciuscula; Kobresia sp.; Linum perenne; Luzula confusa; Lychnis sibirica; Minuartia arctica; Minuartia rubella; Minuartia verna; Myosotis alpestris; Oxycoccus microcarpus; Oxyria digyna; Papaver sect. Scapiflora; Poa indeterminata; Poaceae sp.; Polygonum viviparum; Potamogeton pusillus; Potamogeton sp.; Potamogeton vaginatus; Potentilla arenosa; Potentilla cf. nivea; Potentilla hyparctica; Potentilla cf. stipularis; Potentilla longifolia; Potentilla sect. Hypargyrium; Puccinellia tenuiflora; Ranunculus hyperboreus; Ranunculus nivalis; Ranunculus pedatifidus subsp. affinis; Ranunculus sp.; cf. Lesquerella arctica; Rumex graminifolius-type; Rumex maritimus; Sagina intermedia; Salix sp.; Saxifraga cernua; Saxifraga cespitosa; Saxifraga foliolosa; Saxifraga hieracifolia; Saxifraga hirculus; Saxifraga nivalis; Saxifraga spinulosa; Saxifraga tenuis; Tephroseris palustris; Silene repens; Silene sp.; Sorbaria sorbifolia; Stellaria ciliatisepala; Stellaria crassifolia; Stellaria edwardsii; Stellaria longipes; Stellaria sp.; Thesium sp.; Thalictrum alpinum; Vaccinium uliginosum; Number of taxa; Multiple investigations; RU-Land_1998_Lena; AWI Arctic Land Expedition; Permafrost Research Periglacial Dynamics @ AWI AWI_PerDyn; Arctic; Nivea; Eriophorum; permafrost; Ranunculus pedatifidus; Beringia; Siberia
• Online Access: https://dx.doi.org/10.1594/pangaea.880228; https://doi.pangaea.de/10.1594/PANGAEA.880228

Plant macrofossils from the Mamontovy Khayata permafrost sequence on the Bykovsky Peninsula reflect climate and plant biodiversity in west Beringia during the last cold stage. 14C dates suggest sediment accumulation between about 60,000 and 7500 14C yr B.P. The plant remains prove that during the last cold-stage arctic species coexisted with aquatic, littoral, meadow and steppe taxa. The reconstructed vegetation composition is similar to modern vegetation mosaics in central and northeast Yakutian relict steppe areas. Thus, productive meadow and steppe communities played an important role in the Siberian Arctic vegetation during the late Pleistocene and could have served as food resource for large populations of herbivores. The floristic composition reflects an extremely continental, arid climate with winters colder and summers distinctly warmer than at present.Holocene macrofossil assemblages indicate a successive paludification possibly connected with marine transgression, increased oceanic influence and atmospheric humidity. Although some steppe taxa were still present in the early Holocene, they disappeared completely before ~2900 14C yr B.P. : #value = ca. value