Holocene environmental history of Lake Vuolep Njakajaure (Abisko National Park, Northern Sweden) reconstructed using biological proxy indicators
Holocene environmental and climatic changes are reconstructed using analyses of biological proxies in lake sediments from Vuolep Njakajaure, a lake located near the altitudinal treeline in northern Sweden (68 degrees 20' N, 18 degrees 47' E). We analysed biological proxy indicators from bo...
Published in: | Vegetation History and Archaeobotany |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Online Access: | https://lup.lub.lu.se/record/394937 https://doi.org/10.1007/s00334-006-0054-x |
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ftulundlup:oai:lup.lub.lu.se:83bf8e8c-8928-48e7-8ca2-f9dde340aaea 2023-05-15T12:59:51+02:00 Holocene environmental history of Lake Vuolep Njakajaure (Abisko National Park, Northern Sweden) reconstructed using biological proxy indicators Bigler, Christian Barnekow, Lena Heinrichs, Markus L. Hall, Roland I. 2006 https://lup.lub.lu.se/record/394937 https://doi.org/10.1007/s00334-006-0054-x eng eng Springer https://lup.lub.lu.se/record/394937 http://dx.doi.org/10.1007/s00334-006-0054-x wos:000239958900008 scopus:33747648628 Vegetation History and Archaeobotany; 15(4), pp 309-320 (2006) ISSN: 0939-6314 Geology temperature reconstruction quantitative Subarctic Sweden chironomids diatoms pollen Holocene contributiontojournal/article info:eu-repo/semantics/article text 2006 ftulundlup https://doi.org/10.1007/s00334-006-0054-x 2023-02-01T23:27:54Z Holocene environmental and climatic changes are reconstructed using analyses of biological proxies in lake sediments from Vuolep Njakajaure, a lake located near the altitudinal treeline in northern Sweden (68 degrees 20' N, 18 degrees 47' E). We analysed biological proxy indicators from both aquatic and terrestrial ecosystems, including diatoms, pollen and chironomid head capsules, in order to reconstruct regional Holocene climate and the development of the lake and its catchment. During the early Holocene and after 2500 cal B.P., Fragilaria taxa dominated the diatom assemblages, whereas planktonic Cyclotella taxa prevailed during the major part of the Holocene (7800-2300 cal B.P.), indicating the importance of the pelagic habitat for diatom assemblage composition. The planktonic diatoms appeared at the same time as Alnus became established in the catchment, probably altering nutrient availability and catchment stability. The pollen record is dominated by mountain birch (Betula pubescens ssp. tortuosa) pollen throughout the Holocene, but high percentage abundances of Scots pine (Pinus sylvestris) pollen suggest the presence of a mixed pine-birch forest during the mid-Holocene (6800-2300 cal B.P.). Head capsules of Tanytarsini and Psectrocladius dominated the chironomid assemblage composition throughout the Holocene, in combination with Corynocera ambigua after 2300 cal B.P. A quantitative, diatom-based reconstruction of mean July air temperature indicated a relatively cold temperature during the early Holocene (9000-8000 cal B.P.) and after ca. 2300 cal B.P., whereas the mid-Holocene period is characterised by stable and warm temperatures. The overall patterns of Holocene climate and environmental conditions are similarly described by all biological proxy-indicators, suggesting relatively warm conditions during the mid-Holocene (ca. 7800-2300 cal B.P.), with a subsequent colder climate after 2300 cal B.P. However, the onset and magnitude of the inferred changes differ slightly among the proxies, illustrating ... Article in Journal/Newspaper Abisko Northern Sweden Subarctic Lund University Publications (LUP) Abisko ENVELOPE(18.829,18.829,68.349,68.349) Vuolep ENVELOPE(16.950,16.950,66.300,66.300) Vegetation History and Archaeobotany 15 4 309 320 |
institution |
Open Polar |
collection |
Lund University Publications (LUP) |
op_collection_id |
ftulundlup |
language |
English |
topic |
Geology temperature reconstruction quantitative Subarctic Sweden chironomids diatoms pollen Holocene |
spellingShingle |
Geology temperature reconstruction quantitative Subarctic Sweden chironomids diatoms pollen Holocene Bigler, Christian Barnekow, Lena Heinrichs, Markus L. Hall, Roland I. Holocene environmental history of Lake Vuolep Njakajaure (Abisko National Park, Northern Sweden) reconstructed using biological proxy indicators |
topic_facet |
Geology temperature reconstruction quantitative Subarctic Sweden chironomids diatoms pollen Holocene |
description |
Holocene environmental and climatic changes are reconstructed using analyses of biological proxies in lake sediments from Vuolep Njakajaure, a lake located near the altitudinal treeline in northern Sweden (68 degrees 20' N, 18 degrees 47' E). We analysed biological proxy indicators from both aquatic and terrestrial ecosystems, including diatoms, pollen and chironomid head capsules, in order to reconstruct regional Holocene climate and the development of the lake and its catchment. During the early Holocene and after 2500 cal B.P., Fragilaria taxa dominated the diatom assemblages, whereas planktonic Cyclotella taxa prevailed during the major part of the Holocene (7800-2300 cal B.P.), indicating the importance of the pelagic habitat for diatom assemblage composition. The planktonic diatoms appeared at the same time as Alnus became established in the catchment, probably altering nutrient availability and catchment stability. The pollen record is dominated by mountain birch (Betula pubescens ssp. tortuosa) pollen throughout the Holocene, but high percentage abundances of Scots pine (Pinus sylvestris) pollen suggest the presence of a mixed pine-birch forest during the mid-Holocene (6800-2300 cal B.P.). Head capsules of Tanytarsini and Psectrocladius dominated the chironomid assemblage composition throughout the Holocene, in combination with Corynocera ambigua after 2300 cal B.P. A quantitative, diatom-based reconstruction of mean July air temperature indicated a relatively cold temperature during the early Holocene (9000-8000 cal B.P.) and after ca. 2300 cal B.P., whereas the mid-Holocene period is characterised by stable and warm temperatures. The overall patterns of Holocene climate and environmental conditions are similarly described by all biological proxy-indicators, suggesting relatively warm conditions during the mid-Holocene (ca. 7800-2300 cal B.P.), with a subsequent colder climate after 2300 cal B.P. However, the onset and magnitude of the inferred changes differ slightly among the proxies, illustrating ... |
format |
Article in Journal/Newspaper |
author |
Bigler, Christian Barnekow, Lena Heinrichs, Markus L. Hall, Roland I. |
author_facet |
Bigler, Christian Barnekow, Lena Heinrichs, Markus L. Hall, Roland I. |
author_sort |
Bigler, Christian |
title |
Holocene environmental history of Lake Vuolep Njakajaure (Abisko National Park, Northern Sweden) reconstructed using biological proxy indicators |
title_short |
Holocene environmental history of Lake Vuolep Njakajaure (Abisko National Park, Northern Sweden) reconstructed using biological proxy indicators |
title_full |
Holocene environmental history of Lake Vuolep Njakajaure (Abisko National Park, Northern Sweden) reconstructed using biological proxy indicators |
title_fullStr |
Holocene environmental history of Lake Vuolep Njakajaure (Abisko National Park, Northern Sweden) reconstructed using biological proxy indicators |
title_full_unstemmed |
Holocene environmental history of Lake Vuolep Njakajaure (Abisko National Park, Northern Sweden) reconstructed using biological proxy indicators |
title_sort |
holocene environmental history of lake vuolep njakajaure (abisko national park, northern sweden) reconstructed using biological proxy indicators |
publisher |
Springer |
publishDate |
2006 |
url |
https://lup.lub.lu.se/record/394937 https://doi.org/10.1007/s00334-006-0054-x |
long_lat |
ENVELOPE(18.829,18.829,68.349,68.349) ENVELOPE(16.950,16.950,66.300,66.300) |
geographic |
Abisko Vuolep |
geographic_facet |
Abisko Vuolep |
genre |
Abisko Northern Sweden Subarctic |
genre_facet |
Abisko Northern Sweden Subarctic |
op_source |
Vegetation History and Archaeobotany; 15(4), pp 309-320 (2006) ISSN: 0939-6314 |
op_relation |
https://lup.lub.lu.se/record/394937 http://dx.doi.org/10.1007/s00334-006-0054-x wos:000239958900008 scopus:33747648628 |
op_doi |
https://doi.org/10.1007/s00334-006-0054-x |
container_title |
Vegetation History and Archaeobotany |
container_volume |
15 |
container_issue |
4 |
container_start_page |
309 |
op_container_end_page |
320 |
_version_ |
1766118718677450752 |