Rapid vegetation change during the early Holocene in the Faroe Islands detected in terrestrial and aquatic ecosystems
Abstract High‐resolution pollen, plant macrofossil and sedimentary analyses from early Holocene lacustrine sediments on the Faroe Islands have detected a significant vegetation perturbation suggesting a rapid change in climate between ca. 10 380 cal. yr BP and the Saksunarvatn ash (10 240±60 cal. yr...
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crwiley:10.1002/jqs.783 2024-06-02T08:06:24+00:00 Rapid vegetation change during the early Holocene in the Faroe Islands detected in terrestrial and aquatic ecosystems Hannon, Gina E. Bradshaw, Richard H. W. Wastegård, Stefan Swedish and Danish Research Councils 2003 http://dx.doi.org/10.1002/jqs.783 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjqs.783 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.783 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Quaternary Science volume 18, issue 7, page 615-619 ISSN 0267-8179 1099-1417 journal-article 2003 crwiley https://doi.org/10.1002/jqs.783 2024-05-03T11:03:55Z Abstract High‐resolution pollen, plant macrofossil and sedimentary analyses from early Holocene lacustrine sediments on the Faroe Islands have detected a significant vegetation perturbation suggesting a rapid change in climate between ca. 10 380 cal. yr BP and the Saksunarvatn ash (10 240±60 cal. yr BP). This episode may be synchronous with the decline in δ 18 O values in the Greenland ice‐cores. It also correlates with a short, cold event detected in marine cores from the North Atlantic that has been ascribed to a weakening of thermohaline circulation associated with the sudden drainage of Lake Agassiz into the northwest Atlantic, or, alternatively, a period with distinctly decreased solar forcing. The vegetation sequence begins at ca. 10 500 cal. yr BP with a succession from tundra to shrub‐tundra and increasing lake productivity. Rapid population increases of aquatic plants suggest high summer temperatures between 10 450 and 10 380 cal. yr BP. High pollen percentages, concentrations and influx of Betula, Juniperus and Salix together with macrofossil leaves indicate shrub growth around the site during the initial phases of vegetation colonisation. Unstable conditions followed ca. 10 380 cal. yr BP that changed both the upland vegetation and the aquatic plant communities. A decrease in percentage values of shrub pollen is recorded, with replacement of both aquatics and herbaceous plants by pioneer plant communities. An increase in total pollen accumulation rates not seen in the concentration data suggests increased sediment delivery. The catchment changes are consistent with less seasonal, moister conditions. Subsequent climatic amelioration reinitiated a warmth‐driven succession and catchment stabilisation, but retained high precipitation levels influencing the composition of the post‐event communities. Copyright © 2003 John Wiley & Sons, Ltd. Article in Journal/Newspaper Faroe Islands Greenland Greenland ice cores North Atlantic Northwest Atlantic Tundra Wiley Online Library Faroe Islands Greenland Saksunarvatn ENVELOPE(-7.150,-7.150,62.233,62.233) Journal of Quaternary Science 18 7 615 619 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract High‐resolution pollen, plant macrofossil and sedimentary analyses from early Holocene lacustrine sediments on the Faroe Islands have detected a significant vegetation perturbation suggesting a rapid change in climate between ca. 10 380 cal. yr BP and the Saksunarvatn ash (10 240±60 cal. yr BP). This episode may be synchronous with the decline in δ 18 O values in the Greenland ice‐cores. It also correlates with a short, cold event detected in marine cores from the North Atlantic that has been ascribed to a weakening of thermohaline circulation associated with the sudden drainage of Lake Agassiz into the northwest Atlantic, or, alternatively, a period with distinctly decreased solar forcing. The vegetation sequence begins at ca. 10 500 cal. yr BP with a succession from tundra to shrub‐tundra and increasing lake productivity. Rapid population increases of aquatic plants suggest high summer temperatures between 10 450 and 10 380 cal. yr BP. High pollen percentages, concentrations and influx of Betula, Juniperus and Salix together with macrofossil leaves indicate shrub growth around the site during the initial phases of vegetation colonisation. Unstable conditions followed ca. 10 380 cal. yr BP that changed both the upland vegetation and the aquatic plant communities. A decrease in percentage values of shrub pollen is recorded, with replacement of both aquatics and herbaceous plants by pioneer plant communities. An increase in total pollen accumulation rates not seen in the concentration data suggests increased sediment delivery. The catchment changes are consistent with less seasonal, moister conditions. Subsequent climatic amelioration reinitiated a warmth‐driven succession and catchment stabilisation, but retained high precipitation levels influencing the composition of the post‐event communities. Copyright © 2003 John Wiley & Sons, Ltd. |
author2 |
Swedish and Danish Research Councils |
format |
Article in Journal/Newspaper |
author |
Hannon, Gina E. Bradshaw, Richard H. W. Wastegård, Stefan |
spellingShingle |
Hannon, Gina E. Bradshaw, Richard H. W. Wastegård, Stefan Rapid vegetation change during the early Holocene in the Faroe Islands detected in terrestrial and aquatic ecosystems |
author_facet |
Hannon, Gina E. Bradshaw, Richard H. W. Wastegård, Stefan |
author_sort |
Hannon, Gina E. |
title |
Rapid vegetation change during the early Holocene in the Faroe Islands detected in terrestrial and aquatic ecosystems |
title_short |
Rapid vegetation change during the early Holocene in the Faroe Islands detected in terrestrial and aquatic ecosystems |
title_full |
Rapid vegetation change during the early Holocene in the Faroe Islands detected in terrestrial and aquatic ecosystems |
title_fullStr |
Rapid vegetation change during the early Holocene in the Faroe Islands detected in terrestrial and aquatic ecosystems |
title_full_unstemmed |
Rapid vegetation change during the early Holocene in the Faroe Islands detected in terrestrial and aquatic ecosystems |
title_sort |
rapid vegetation change during the early holocene in the faroe islands detected in terrestrial and aquatic ecosystems |
publisher |
Wiley |
publishDate |
2003 |
url |
http://dx.doi.org/10.1002/jqs.783 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjqs.783 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.783 |
long_lat |
ENVELOPE(-7.150,-7.150,62.233,62.233) |
geographic |
Faroe Islands Greenland Saksunarvatn |
geographic_facet |
Faroe Islands Greenland Saksunarvatn |
genre |
Faroe Islands Greenland Greenland ice cores North Atlantic Northwest Atlantic Tundra |
genre_facet |
Faroe Islands Greenland Greenland ice cores North Atlantic Northwest Atlantic Tundra |
op_source |
Journal of Quaternary Science volume 18, issue 7, page 615-619 ISSN 0267-8179 1099-1417 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/jqs.783 |
container_title |
Journal of Quaternary Science |
container_volume |
18 |
container_issue |
7 |
container_start_page |
615 |
op_container_end_page |
619 |
_version_ |
1800751341959643136 |