Diatom blooms and associated vegetation shifts in a subarctic peatland : responses to distant volcanic eruptions?
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 o...
Published in: | Journal of Quaternary Science |
---|---|
Main Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
John Wiley & Sons Inc.
2016
|
Subjects: | |
Online Access: | https://lup.lub.lu.se/record/03bc92ff-f709-4ace-8871-2618e1731864 https://doi.org/10.1002/jqs.2898 |
id |
ftulundlup:oai:lup.lub.lu.se:03bc92ff-f709-4ace-8871-2618e1731864 |
---|---|
record_format |
openpolar |
spelling |
ftulundlup:oai:lup.lub.lu.se:03bc92ff-f709-4ace-8871-2618e1731864 2024-02-04T10:01:08+01:00 Diatom blooms and associated vegetation shifts in a subarctic peatland : responses to distant volcanic eruptions? Kokfelt, U. Muscheler, R. Mellström, A. Struyf, E. Rundgren, M. Wastegård, S. Hammarlund, D. 2016-10-01 https://lup.lub.lu.se/record/03bc92ff-f709-4ace-8871-2618e1731864 https://doi.org/10.1002/jqs.2898 eng eng John Wiley & Sons Inc. https://lup.lub.lu.se/record/03bc92ff-f709-4ace-8871-2618e1731864 http://dx.doi.org/10.1002/jqs.2898 wos:000388437800007 scopus:84992467236 Journal of Quaternary Science; 31(7), pp 723-730 (2016) ISSN: 0267-8179 Geology acid deposition diatoms permafrost peatland vegetation changes volcanic impact contributiontojournal/article info:eu-repo/semantics/article text 2016 ftulundlup https://doi.org/10.1002/jqs.2898 2024-01-10T23:29:18Z 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 (1σ)/AD 1210–1303 (2σ) (median: AD 1260) and AD 1674–1795 (1σ)/AD 1665–1875 (2σ) (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. Article in Journal/Newspaper Ice Northern Sweden permafrost Subarctic Lund University Publications (LUP) Laki ENVELOPE(-18.237,-18.237,64.070,64.070) Journal of Quaternary Science 31 7 723 730 |
institution |
Open Polar |
collection |
Lund University Publications (LUP) |
op_collection_id |
ftulundlup |
language |
English |
topic |
Geology acid deposition diatoms permafrost peatland vegetation changes volcanic impact |
spellingShingle |
Geology acid deposition diatoms permafrost peatland vegetation changes volcanic impact Kokfelt, U. Muscheler, R. Mellström, A. Struyf, E. Rundgren, M. Wastegård, S. Hammarlund, D. Diatom blooms and associated vegetation shifts in a subarctic peatland : responses to distant volcanic eruptions? |
topic_facet |
Geology acid deposition diatoms permafrost peatland vegetation changes volcanic impact |
description |
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 (1σ)/AD 1210–1303 (2σ) (median: AD 1260) and AD 1674–1795 (1σ)/AD 1665–1875 (2σ) (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. |
format |
Article in Journal/Newspaper |
author |
Kokfelt, U. Muscheler, R. Mellström, A. Struyf, E. Rundgren, M. Wastegård, S. Hammarlund, D. |
author_facet |
Kokfelt, U. Muscheler, R. Mellström, A. Struyf, E. Rundgren, M. Wastegård, 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? |
publisher |
John Wiley & Sons Inc. |
publishDate |
2016 |
url |
https://lup.lub.lu.se/record/03bc92ff-f709-4ace-8871-2618e1731864 https://doi.org/10.1002/jqs.2898 |
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 |
Journal of Quaternary Science; 31(7), pp 723-730 (2016) ISSN: 0267-8179 |
op_relation |
https://lup.lub.lu.se/record/03bc92ff-f709-4ace-8871-2618e1731864 http://dx.doi.org/10.1002/jqs.2898 wos:000388437800007 scopus:84992467236 |
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_ |
1789966810167115776 |