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...
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2015
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Online Access: | https://research-portal.st-andrews.ac.uk/en/researchoutput/holocene-environmental-changes-in-southern-kamchatka-far-eastern-russia-inferred-from-a-pollen-and-testate-amoebae-peat-succession-record(7ba3beef-ae48-4ce5-8dcf-a8ed18e82e1d).html https://doi.org/10.1016/j.gloplacha.2015.09.010 |
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ftunstandrewcris:oai:research-portal.st-andrews.ac.uk:publications/7ba3beef-ae48-4ce5-8dcf-a8ed18e82e1d 2024-06-23T07:54:17+00:00 Holocene environmental changes in southern Kamchatka, Far Eastern Russia, inferred from a pollen and testate amoebae peat succession record Klimaschewski, Andrea Barnekow, Lena Bennett, Keith David Andreev, A. A. Andrén, Elinor Bobrov, A. A. Hammarlund, Dan 2015-11 https://research-portal.st-andrews.ac.uk/en/researchoutput/holocene-environmental-changes-in-southern-kamchatka-far-eastern-russia-inferred-from-a-pollen-and-testate-amoebae-peat-succession-record(7ba3beef-ae48-4ce5-8dcf-a8ed18e82e1d).html https://doi.org/10.1016/j.gloplacha.2015.09.010 eng eng https://research-portal.st-andrews.ac.uk/en/researchoutput/holocene-environmental-changes-in-southern-kamchatka-far-eastern-russia-inferred-from-a-pollen-and-testate-amoebae-peat-succession-record(7ba3beef-ae48-4ce5-8dcf-a8ed18e82e1d).html info:eu-repo/semantics/restrictedAccess Klimaschewski , A , Barnekow , L , Bennett , K D , Andreev , A A , Andrén , E , Bobrov , A A & Hammarlund , D 2015 , ' Holocene environmental changes in southern Kamchatka, Far Eastern Russia, inferred from a pollen and testate amoebae peat succession record ' , Global and Planetary Change , vol. 134 , pp. 142-154 . https://doi.org/10.1016/j.gloplacha.2015.09.010 Holocene Kamchatka Pollen Testate amoebae Landscape development Climate change article 2015 ftunstandrewcris https://doi.org/10.1016/j.gloplacha.2015.09.010 2024-06-13T00:49:49Z 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.l. ) 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 ... Article in Journal/Newspaper Kamchatka Kamchatka Peninsula University of St Andrews: Research Portal 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 |
University of St Andrews: Research Portal |
op_collection_id |
ftunstandrewcris |
language |
English |
topic |
Holocene Kamchatka Pollen Testate amoebae Landscape development Climate change |
spellingShingle |
Holocene Kamchatka Pollen Testate amoebae Landscape development Climate change Klimaschewski, Andrea Barnekow, Lena Bennett, Keith David Andreev, A. A. Andrén, Elinor 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 |
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.l. ) 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 ... |
format |
Article in Journal/Newspaper |
author |
Klimaschewski, Andrea Barnekow, Lena Bennett, Keith David Andreev, A. A. Andrén, Elinor Bobrov, A. A. Hammarlund, Dan |
author_facet |
Klimaschewski, Andrea Barnekow, Lena Bennett, Keith David Andreev, A. A. Andrén, Elinor Bobrov, A. A. Hammarlund, Dan |
author_sort |
Klimaschewski, Andrea |
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 |
publishDate |
2015 |
url |
https://research-portal.st-andrews.ac.uk/en/researchoutput/holocene-environmental-changes-in-southern-kamchatka-far-eastern-russia-inferred-from-a-pollen-and-testate-amoebae-peat-succession-record(7ba3beef-ae48-4ce5-8dcf-a8ed18e82e1d).html 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 |
Klimaschewski , A , Barnekow , L , Bennett , K D , Andreev , A A , Andrén , E , Bobrov , A A & Hammarlund , D 2015 , ' Holocene environmental changes in southern Kamchatka, Far Eastern Russia, inferred from a pollen and testate amoebae peat succession record ' , Global and Planetary Change , vol. 134 , pp. 142-154 . https://doi.org/10.1016/j.gloplacha.2015.09.010 |
op_relation |
https://research-portal.st-andrews.ac.uk/en/researchoutput/holocene-environmental-changes-in-southern-kamchatka-far-eastern-russia-inferred-from-a-pollen-and-testate-amoebae-peat-succession-record(7ba3beef-ae48-4ce5-8dcf-a8ed18e82e1d).html |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.gloplacha.2015.09.010 |
container_title |
Global and Planetary Change |
container_volume |
134 |
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142 |
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154 |
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