Holocene environmental changes in southern Kamchatka, Far Eastern Russia, inferred from a pollen and testate amoebae peat succession record
High resolution palaeoenvironmental records in Far-Eastern Russia are rare, and the Kamchatka Peninsula is among the least studied areas of the region. This paper describes a record spanning the last ca. 11,000 yr, obtained from a bog in the southern part of Kamchatka. The radiocarbon dated core was...
Published in: | Global and Planetary Change |
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Online Access: | https://lup.lub.lu.se/record/8539706 https://doi.org/10.1016/j.gloplacha.2015.09.010 |
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ftulundlup:oai:lup.lub.lu.se:9664570f-85d9-4d16-b16e-6e2950012c6c 2023-05-15T16:58:47+02:00 Holocene environmental changes in southern Kamchatka, Far Eastern Russia, inferred from a pollen and testate amoebae peat succession record Klimaschewski, A. Barnekow, Lena Bennett, K. D. Andreev, A. A. Andren, E. Bobrov, A. A. Hammarlund, Dan 2015 https://lup.lub.lu.se/record/8539706 https://doi.org/10.1016/j.gloplacha.2015.09.010 eng eng Elsevier https://lup.lub.lu.se/record/8539706 http://dx.doi.org/10.1016/j.gloplacha.2015.09.010 wos:000365369900013 scopus:84946553172 Global and Planetary Change; 134, pp 142-154 (2015) ISSN: 1872-6364 Geology Holocene Kamchatka Pollen Testate amoebae Landscape development Climate change contributiontojournal/article info:eu-repo/semantics/article text 2015 ftulundlup https://doi.org/10.1016/j.gloplacha.2015.09.010 2023-02-01T23:29:14Z High resolution palaeoenvironmental records in Far-Eastern Russia are rare, and the Kamchatka Peninsula is among the least studied areas of the region. This paper describes a record spanning the last ca. 11,000 yr, obtained from a bog in the southern part of Kamchatka. The radiocarbon dated core was analysed for pollen, testate amoebae, charcoal and loss-on-ignition (LOI). The vegetation during the early Holocene was dominated by grasses (Poaceae), birch (Betula) and heath (Ericaceae p. p.). Around 10,300 cal yr BP there was a substantial change in the vegetation cover to shrub alder (Alnus viridis s.I.) stands with sedges and ferns (Polypodiophyta) as well as herbs such as meadow rue (Thalictrum) in the understory. In the surroundings of Utka peatlands started to form. The variations in the vegetation cover were most probably caused by climatic changes. At the beginning of sediment accumulation, before 10,300 cal yr BP, the composition of the vegetation points to cooler summers and/or decreased annual precipitation. Around 10,300 cal yr BP, changes in vegetation occurred due to rising temperatures and/or changed water regimes. Increased abundancies of dry indicating testate amoebae after 9100 cal yr BP point to intermediate to dry soil conditions. Between 8600 and 7700 cal yr BP tree alder (Alnus incana) was widely spread at the site which probably indicates optimal environmental conditions. The tephra layer at 381-384.5 cm (ca. 8500 cal yr BP) produces a strong impact on the testate amoebae assemblages. At 7700 cal yr BP there was a sudden drop of A. incana in the local vegetation. From this time on, A. incana and also A. viridis decrease continuously whereas Betula gradually increases. The upper part of the sequence (after 6300 cal yr BP) shows higher abundancies of meadowsweet (Filipendula) and sweet gale (Myrica) pollen. After 6300 cal yr BP, changes in testate amoebae demonstrate variable soil moisture conditions at the site. Between 3700 and 1800 cal yr BP, wet conditions dominate as dry indicating ... Article in Journal/Newspaper Kamchatka Kamchatka Peninsula Lund University Publications (LUP) Kamchatka Peninsula ENVELOPE(160.000,160.000,56.000,56.000) Utka ENVELOPE(156.362,156.362,53.141,53.141) Global and Planetary Change 134 142 154 |
institution |
Open Polar |
collection |
Lund University Publications (LUP) |
op_collection_id |
ftulundlup |
language |
English |
topic |
Geology Holocene Kamchatka Pollen Testate amoebae Landscape development Climate change |
spellingShingle |
Geology Holocene Kamchatka Pollen Testate amoebae Landscape development Climate change Klimaschewski, A. Barnekow, Lena Bennett, K. D. Andreev, A. A. Andren, E. Bobrov, A. A. Hammarlund, Dan Holocene environmental changes in southern Kamchatka, Far Eastern Russia, inferred from a pollen and testate amoebae peat succession record |
topic_facet |
Geology Holocene Kamchatka Pollen Testate amoebae Landscape development Climate change |
description |
High resolution palaeoenvironmental records in Far-Eastern Russia are rare, and the Kamchatka Peninsula is among the least studied areas of the region. This paper describes a record spanning the last ca. 11,000 yr, obtained from a bog in the southern part of Kamchatka. The radiocarbon dated core was analysed for pollen, testate amoebae, charcoal and loss-on-ignition (LOI). The vegetation during the early Holocene was dominated by grasses (Poaceae), birch (Betula) and heath (Ericaceae p. p.). Around 10,300 cal yr BP there was a substantial change in the vegetation cover to shrub alder (Alnus viridis s.I.) stands with sedges and ferns (Polypodiophyta) as well as herbs such as meadow rue (Thalictrum) in the understory. In the surroundings of Utka peatlands started to form. The variations in the vegetation cover were most probably caused by climatic changes. At the beginning of sediment accumulation, before 10,300 cal yr BP, the composition of the vegetation points to cooler summers and/or decreased annual precipitation. Around 10,300 cal yr BP, changes in vegetation occurred due to rising temperatures and/or changed water regimes. Increased abundancies of dry indicating testate amoebae after 9100 cal yr BP point to intermediate to dry soil conditions. Between 8600 and 7700 cal yr BP tree alder (Alnus incana) was widely spread at the site which probably indicates optimal environmental conditions. The tephra layer at 381-384.5 cm (ca. 8500 cal yr BP) produces a strong impact on the testate amoebae assemblages. At 7700 cal yr BP there was a sudden drop of A. incana in the local vegetation. From this time on, A. incana and also A. viridis decrease continuously whereas Betula gradually increases. The upper part of the sequence (after 6300 cal yr BP) shows higher abundancies of meadowsweet (Filipendula) and sweet gale (Myrica) pollen. After 6300 cal yr BP, changes in testate amoebae demonstrate variable soil moisture conditions at the site. Between 3700 and 1800 cal yr BP, wet conditions dominate as dry indicating ... |
format |
Article in Journal/Newspaper |
author |
Klimaschewski, A. Barnekow, Lena Bennett, K. D. Andreev, A. A. Andren, E. Bobrov, A. A. Hammarlund, Dan |
author_facet |
Klimaschewski, A. Barnekow, Lena Bennett, K. D. Andreev, A. A. Andren, E. Bobrov, A. A. Hammarlund, Dan |
author_sort |
Klimaschewski, A. |
title |
Holocene environmental changes in southern Kamchatka, Far Eastern Russia, inferred from a pollen and testate amoebae peat succession record |
title_short |
Holocene environmental changes in southern Kamchatka, Far Eastern Russia, inferred from a pollen and testate amoebae peat succession record |
title_full |
Holocene environmental changes in southern Kamchatka, Far Eastern Russia, inferred from a pollen and testate amoebae peat succession record |
title_fullStr |
Holocene environmental changes in southern Kamchatka, Far Eastern Russia, inferred from a pollen and testate amoebae peat succession record |
title_full_unstemmed |
Holocene environmental changes in southern Kamchatka, Far Eastern Russia, inferred from a pollen and testate amoebae peat succession record |
title_sort |
holocene environmental changes in southern kamchatka, far eastern russia, inferred from a pollen and testate amoebae peat succession record |
publisher |
Elsevier |
publishDate |
2015 |
url |
https://lup.lub.lu.se/record/8539706 https://doi.org/10.1016/j.gloplacha.2015.09.010 |
long_lat |
ENVELOPE(160.000,160.000,56.000,56.000) ENVELOPE(156.362,156.362,53.141,53.141) |
geographic |
Kamchatka Peninsula Utka |
geographic_facet |
Kamchatka Peninsula Utka |
genre |
Kamchatka Kamchatka Peninsula |
genre_facet |
Kamchatka Kamchatka Peninsula |
op_source |
Global and Planetary Change; 134, pp 142-154 (2015) ISSN: 1872-6364 |
op_relation |
https://lup.lub.lu.se/record/8539706 http://dx.doi.org/10.1016/j.gloplacha.2015.09.010 wos:000365369900013 scopus:84946553172 |
op_doi |
https://doi.org/10.1016/j.gloplacha.2015.09.010 |
container_title |
Global and Planetary Change |
container_volume |
134 |
container_start_page |
142 |
op_container_end_page |
154 |
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1766050887333052416 |