Diatom blooms and associated vegetation shifts in a subarctic peatland: responses to distant volcanic eruptions?
Abstract: We test the hypothesis that rich occurrences of diatoms observed at transitions between major peat units representing different vegetation communities in a peat sequence from subarctic northern Sweden reflect responses to acid deposition from the Samalas AD 1257 and Laki AD 1783/1784 erupt...
Published in: | Journal of Quaternary Science |
---|---|
Main Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2016
|
Subjects: | |
Online Access: | https://hdl.handle.net/10067/1392460151162165141 |
id |
ftunivantwerpen:c:irua:139246 |
---|---|
record_format |
openpolar |
spelling |
ftunivantwerpen:c:irua:139246 2023-07-16T03:58:58+02:00 Diatom blooms and associated vegetation shifts in a subarctic peatland: responses to distant volcanic eruptions? Kokfelt, U. Muscheler, R. Mellstrom, A. Struyf, Eric Rundgren, M. Wastegard, S. Hammarlund, D. 2016 https://hdl.handle.net/10067/1392460151162165141 eng eng info:eu-repo/semantics/altIdentifier/doi/10.1002/JQS.2898 info:eu-repo/semantics/altIdentifier/isi/000388437800007 info:eu-repo/semantics/closedAccess 0267-8179 Journal of quaternary science Economics Physics info:eu-repo/semantics/article 2016 ftunivantwerpen https://doi.org/10.1002/JQS.2898 2023-06-26T22:21:18Z Abstract: We test the hypothesis that rich occurrences of diatoms observed at transitions between major peat units representing different vegetation communities in a peat sequence from subarctic northern Sweden reflect responses to acid deposition from the Samalas AD 1257 and Laki AD 1783/1784 eruptions. We observe sudden changes in the mire ecosystem and thereby in the trophic status and biogeochemical cycling of the peatland. Both the eruptions are known to have been associated with significant acid deposition events and climatic anomalies, as recorded in polar ice cores. To test the hypothesis, new chronological analyses and age modelling were applied to existing biogeochemical and biological records from the peat sequence. This approach yielded modelled age ranges of AD 1239-1284 (1s)/AD 1210-1303 (2s) (median: AD 1260) and AD 1674-1795 (1s)/AD 1665-1875 (2s) (median AD 1743), respectively, for the stratigraphic transitions. Hence, the modelled age ranges bracket the ages of the eruptions in question and the hypothesis could therefore not be rejected. Impacts of acid deposition from the eruptions are assumed to have caused instant acidification, vegetation damage, increased nutrient cycling and blooms of opportunistic epiphytic diatoms. In addition, cooling may have contributed to vegetation changes through permafrost inception, frost heave and thereby altered hydrological conditions. Copyright (C) 2016 John Wiley & Sons, Ltd. Article in Journal/Newspaper Ice Northern Sweden permafrost Subarctic IRUA - Institutional Repository van de Universiteit Antwerpen Laki ENVELOPE(-18.237,-18.237,64.070,64.070) Journal of Quaternary Science 31 7 723 730 |
institution |
Open Polar |
collection |
IRUA - Institutional Repository van de Universiteit Antwerpen |
op_collection_id |
ftunivantwerpen |
language |
English |
topic |
Economics Physics |
spellingShingle |
Economics Physics Kokfelt, U. Muscheler, R. Mellstrom, A. Struyf, Eric Rundgren, M. Wastegard, S. Hammarlund, D. Diatom blooms and associated vegetation shifts in a subarctic peatland: responses to distant volcanic eruptions? |
topic_facet |
Economics Physics |
description |
Abstract: We test the hypothesis that rich occurrences of diatoms observed at transitions between major peat units representing different vegetation communities in a peat sequence from subarctic northern Sweden reflect responses to acid deposition from the Samalas AD 1257 and Laki AD 1783/1784 eruptions. We observe sudden changes in the mire ecosystem and thereby in the trophic status and biogeochemical cycling of the peatland. Both the eruptions are known to have been associated with significant acid deposition events and climatic anomalies, as recorded in polar ice cores. To test the hypothesis, new chronological analyses and age modelling were applied to existing biogeochemical and biological records from the peat sequence. This approach yielded modelled age ranges of AD 1239-1284 (1s)/AD 1210-1303 (2s) (median: AD 1260) and AD 1674-1795 (1s)/AD 1665-1875 (2s) (median AD 1743), respectively, for the stratigraphic transitions. Hence, the modelled age ranges bracket the ages of the eruptions in question and the hypothesis could therefore not be rejected. Impacts of acid deposition from the eruptions are assumed to have caused instant acidification, vegetation damage, increased nutrient cycling and blooms of opportunistic epiphytic diatoms. In addition, cooling may have contributed to vegetation changes through permafrost inception, frost heave and thereby altered hydrological conditions. Copyright (C) 2016 John Wiley & Sons, Ltd. |
format |
Article in Journal/Newspaper |
author |
Kokfelt, U. Muscheler, R. Mellstrom, A. Struyf, Eric Rundgren, M. Wastegard, S. Hammarlund, D. |
author_facet |
Kokfelt, U. Muscheler, R. Mellstrom, A. Struyf, Eric Rundgren, M. Wastegard, S. Hammarlund, D. |
author_sort |
Kokfelt, U. |
title |
Diatom blooms and associated vegetation shifts in a subarctic peatland: responses to distant volcanic eruptions? |
title_short |
Diatom blooms and associated vegetation shifts in a subarctic peatland: responses to distant volcanic eruptions? |
title_full |
Diatom blooms and associated vegetation shifts in a subarctic peatland: responses to distant volcanic eruptions? |
title_fullStr |
Diatom blooms and associated vegetation shifts in a subarctic peatland: responses to distant volcanic eruptions? |
title_full_unstemmed |
Diatom blooms and associated vegetation shifts in a subarctic peatland: responses to distant volcanic eruptions? |
title_sort |
diatom blooms and associated vegetation shifts in a subarctic peatland: responses to distant volcanic eruptions? |
publishDate |
2016 |
url |
https://hdl.handle.net/10067/1392460151162165141 |
long_lat |
ENVELOPE(-18.237,-18.237,64.070,64.070) |
geographic |
Laki |
geographic_facet |
Laki |
genre |
Ice Northern Sweden permafrost Subarctic |
genre_facet |
Ice Northern Sweden permafrost Subarctic |
op_source |
0267-8179 Journal of quaternary science |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1002/JQS.2898 info:eu-repo/semantics/altIdentifier/isi/000388437800007 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1002/JQS.2898 |
container_title |
Journal of Quaternary Science |
container_volume |
31 |
container_issue |
7 |
container_start_page |
723 |
op_container_end_page |
730 |
_version_ |
1771546374096027648 |