Late Glacial to Holocene paleoenvironmental change on the northwestern Pacific seaboard, Kamchatka Peninsula (Russia)

QUATERNARY SCIENCE REVIEWS

卷:157

Article

Pendea, Ionel Florin¹  Ponomareva, Vera²  Bourgeois, Joanne³  Zubrow, Ezra B. W.⁴  Portnyagin, Maxim^5,6  Ponkratova, Irina⁷  Harmsen, Hans⁴  Korosec, Gregory⁴ 

[1] Lakehead Univ, Sustainabil Sci Dept, 500 Univ Ave, Orillia, ON L3V 0B9, Canada

[2] Inst Volcanol & Seismol, Piip Blvd 9, Petropavlovsk Kamchatski 683006, Russia

[3] Univ Washington, Dept Earth & Space Sci, Seattle, WA 98195 USA

[4] SUNY Buffalo, Dept Anthropol, 380 MFAC, Buffalo, NY 14261 USA

[5] Helmholtz Ctr Ocean Res Kiel GEOMAR, Wischhofstr 1-3, D-24148 Kiel, Germany

[6] VL Vernadsky Inst Geochem & Analyt Chem, Kosygin Str 19, Moscow 119991, Russia

[7] North Int Univ, Portovaya Str 13, Magadan 685030, Russia

关键词: Kamchatka Peninsula;    Late Glacial;    Holocene;    Pollen;    Charcoal;    Tephra;    Vegetation history;    Fire history;   

DOI  :  10.1016/j.quascirev.2016.11.035

来源: Elsevier

【 摘 要 】

We used a new sedimentary record from a small kettle wetland to reconstruct the Late Glacial and Holocene vegetation and fire history of the Krutoberegovo-Ust Kamchatsk region in eastern Kamchatka Peninsula (Russia). Pollen and charcoal data suggest that the Late Glacial landscape was dominated by a relatively fire-prone Larix forest-tundra during the Greenland Interstadial complex (GI 1) and a subarctic steppe during the Younger Dryas (GS1). The onset of the Holocene is marked by the reappearance of trees (mainly Alnus incana) within a fern and shrub dominated landscape. The Holocene Thermal Maximum (HTM) features shifting vegetational communities dominated by Alnus shrubs, diverse forb species, and locally abundant aquatic plants. The HTM is further defined by the first appearance of stone birch forests (Betula ermanii) Kamchatka's most abundant modern tree species. The Late Holocene is marked by shifts in forest dynamics and forest-graminoid ratio and the appearance of new non-arboreal taxa such as bayberry (Myrica) and meadow rue (Filipendula). Kamchatka is one of Earth's most active volcanic regions. During the Late Glacial and Holocene, Kamchatka's volcanoes spread large quantities of tephra over the study region. Thirty-four tephra falls have been identified at the site. The events represented by most of these tephra falls have not left evidence of major impacts on the vegetation although some of the thicker tephras caused expansion of grasses (Poaceae) and, at least in one case, forest die-out and increased fire activity. (C) 2016 Elsevier Ltd. All rights reserved.

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