Palaeoceanographic changes in Hornsund Fjord (Spitsbergen, Svalbard) over the last millennium: new insights from ancient DNA
This paper presents a reconstruction of climate-driven environmental changes over the last millennium in Hornsund Fjord (Svalbard), based on sedimentological and micropalaeontological records. Our palaeo-investigation was supported by an analysis of foraminiferal ancient DNA (aDNA), focusing on the...
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Copernicus Publications
2016
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Online Access: | https://doi.org/10.5194/cp-12-1459-2016 http://www.clim-past.net/12/1459/2016/cp-12-1459-2016.pdf https://doaj.org/article/938ce03f7ba8497299778ba536de8733 |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:938ce03f7ba8497299778ba536de8733 2023-05-15T16:22:15+02:00 Palaeoceanographic changes in Hornsund Fjord (Spitsbergen, Svalbard) over the last millennium: new insights from ancient DNA J. Pawłowska M. Zajączkowski M. Łącka F. Lejzerowicz P. Esling J. Pawlowski 2016-07-01 https://doi.org/10.5194/cp-12-1459-2016 http://www.clim-past.net/12/1459/2016/cp-12-1459-2016.pdf https://doaj.org/article/938ce03f7ba8497299778ba536de8733 en eng Copernicus Publications 1814-9324 1814-9332 doi:10.5194/cp-12-1459-2016 http://www.clim-past.net/12/1459/2016/cp-12-1459-2016.pdf https://doaj.org/article/938ce03f7ba8497299778ba536de8733 undefined Climate of the Past, Vol 12, Iss 7, Pp 1459-1472 (2016) envir geo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2016 fttriple https://doi.org/10.5194/cp-12-1459-2016 2023-01-22T18:03:26Z This paper presents a reconstruction of climate-driven environmental changes over the last millennium in Hornsund Fjord (Svalbard), based on sedimentological and micropalaeontological records. Our palaeo-investigation was supported by an analysis of foraminiferal ancient DNA (aDNA), focusing on the non-fossilized monothalamous species. The main climatic fluctuations during the last millennium were the Medieval Warm Period (MWP, AD 1000–1600), the Little Ice Age (LIA, AD 1600–1900) and the modern warming (MW, AD 1900 to present). Our study indicates that the environmental conditions in Hornsund during the MWP and the early LIA (before ∼ AD 1800) were relatively stable. The beginning of the LIA (∼ AD 1600) was poorly evidenced by the micropalaeontological record but was well marked in the aDNA data by an increased proportion of monothalamous foraminifera, especially Bathysiphon sp. The early LIA (∼ 1600 to ∼ AD 1800) was marked by an increase in the abundance of sequences of Hippocrepinella hirudinea and Cedhagenia saltatus. In the late LIA (after ∼ AD 1800), the conditions in the fjord became glacier-proximal and were characterized by increased meltwater outflows, high sedimentation and a high calving rate. This coincided with an increase in the percentages of sequences of Micrometula sp. and Vellaria pellucidus. During the MW, the major glacier fronts retreated rapidly to the inner bays, which limited the iceberg discharge to the fjord's centre and caused a shift in the foraminiferal community that was reflected in both the fossil and aDNA records. The palaeoceanographic changes in the Hornsund fjord over the last millennium were driven mainly by the inflow of shelf-originated water masses and glacial activity. However, the environmental changes were poorly evidenced in the micropalaeontological record, but they were well documented in our aDNA data. We considerably increased the number of potential proxy species by including monothalamous foraminifera in the palaeoecological studies. Article in Journal/Newspaper glacier Hornsund Svalbard Spitsbergen Unknown Hornsund ENVELOPE(15.865,15.865,76.979,76.979) Svalbard Climate of the Past 12 7 1459 1472 |
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Open Polar |
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Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
envir geo |
spellingShingle |
envir geo J. Pawłowska M. Zajączkowski M. Łącka F. Lejzerowicz P. Esling J. Pawlowski Palaeoceanographic changes in Hornsund Fjord (Spitsbergen, Svalbard) over the last millennium: new insights from ancient DNA |
topic_facet |
envir geo |
description |
This paper presents a reconstruction of climate-driven environmental changes over the last millennium in Hornsund Fjord (Svalbard), based on sedimentological and micropalaeontological records. Our palaeo-investigation was supported by an analysis of foraminiferal ancient DNA (aDNA), focusing on the non-fossilized monothalamous species. The main climatic fluctuations during the last millennium were the Medieval Warm Period (MWP, AD 1000–1600), the Little Ice Age (LIA, AD 1600–1900) and the modern warming (MW, AD 1900 to present). Our study indicates that the environmental conditions in Hornsund during the MWP and the early LIA (before ∼ AD 1800) were relatively stable. The beginning of the LIA (∼ AD 1600) was poorly evidenced by the micropalaeontological record but was well marked in the aDNA data by an increased proportion of monothalamous foraminifera, especially Bathysiphon sp. The early LIA (∼ 1600 to ∼ AD 1800) was marked by an increase in the abundance of sequences of Hippocrepinella hirudinea and Cedhagenia saltatus. In the late LIA (after ∼ AD 1800), the conditions in the fjord became glacier-proximal and were characterized by increased meltwater outflows, high sedimentation and a high calving rate. This coincided with an increase in the percentages of sequences of Micrometula sp. and Vellaria pellucidus. During the MW, the major glacier fronts retreated rapidly to the inner bays, which limited the iceberg discharge to the fjord's centre and caused a shift in the foraminiferal community that was reflected in both the fossil and aDNA records. The palaeoceanographic changes in the Hornsund fjord over the last millennium were driven mainly by the inflow of shelf-originated water masses and glacial activity. However, the environmental changes were poorly evidenced in the micropalaeontological record, but they were well documented in our aDNA data. We considerably increased the number of potential proxy species by including monothalamous foraminifera in the palaeoecological studies. |
format |
Article in Journal/Newspaper |
author |
J. Pawłowska M. Zajączkowski M. Łącka F. Lejzerowicz P. Esling J. Pawlowski |
author_facet |
J. Pawłowska M. Zajączkowski M. Łącka F. Lejzerowicz P. Esling J. Pawlowski |
author_sort |
J. Pawłowska |
title |
Palaeoceanographic changes in Hornsund Fjord (Spitsbergen, Svalbard) over the last millennium: new insights from ancient DNA |
title_short |
Palaeoceanographic changes in Hornsund Fjord (Spitsbergen, Svalbard) over the last millennium: new insights from ancient DNA |
title_full |
Palaeoceanographic changes in Hornsund Fjord (Spitsbergen, Svalbard) over the last millennium: new insights from ancient DNA |
title_fullStr |
Palaeoceanographic changes in Hornsund Fjord (Spitsbergen, Svalbard) over the last millennium: new insights from ancient DNA |
title_full_unstemmed |
Palaeoceanographic changes in Hornsund Fjord (Spitsbergen, Svalbard) over the last millennium: new insights from ancient DNA |
title_sort |
palaeoceanographic changes in hornsund fjord (spitsbergen, svalbard) over the last millennium: new insights from ancient dna |
publisher |
Copernicus Publications |
publishDate |
2016 |
url |
https://doi.org/10.5194/cp-12-1459-2016 http://www.clim-past.net/12/1459/2016/cp-12-1459-2016.pdf https://doaj.org/article/938ce03f7ba8497299778ba536de8733 |
long_lat |
ENVELOPE(15.865,15.865,76.979,76.979) |
geographic |
Hornsund Svalbard |
geographic_facet |
Hornsund Svalbard |
genre |
glacier Hornsund Svalbard Spitsbergen |
genre_facet |
glacier Hornsund Svalbard Spitsbergen |
op_source |
Climate of the Past, Vol 12, Iss 7, Pp 1459-1472 (2016) |
op_relation |
1814-9324 1814-9332 doi:10.5194/cp-12-1459-2016 http://www.clim-past.net/12/1459/2016/cp-12-1459-2016.pdf https://doaj.org/article/938ce03f7ba8497299778ba536de8733 |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/cp-12-1459-2016 |
container_title |
Climate of the Past |
container_volume |
12 |
container_issue |
7 |
container_start_page |
1459 |
op_container_end_page |
1472 |
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