Evaluating the use of testate amoebae for palaeohydrological reconstruction in permafrost peatlands
The melting of high-latitude permafrost peatlands is a major concern due to a potential positive feedback on global climate change. We examine the ecology of testate amoebae in permafrost peatlands, based on sites in Sweden (~ 200 km north of the Arctic Circle). Multivariate statistical analysis con...
Published in: | Palaeogeography, Palaeoclimatology, Palaeoecology |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Online Access: | https://pure.qub.ac.uk/en/publications/cfc15ede-761c-49f3-a4e3-e97492ba2d8d https://doi.org/10.1016/j.palaeo.2015.02.004 |
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ftqueensubelpubl:oai:pure.qub.ac.uk/portal:publications/cfc15ede-761c-49f3-a4e3-e97492ba2d8d 2024-01-14T10:04:51+01:00 Evaluating the use of testate amoebae for palaeohydrological reconstruction in permafrost peatlands Swindles, Graeme T. Amesbury, Matthew J. Turner, T. Edward Carrivick, Jonathan L. Woulds, Clare Raby, Cassandra Mullan, Donal Roland, Thomas P. Galloway, Jennifer M. Parry, Lauren Kokfelt, Ulla Garneau, Michelle Charman, Dan J. Holden, Joseph 2015-04-15 https://pure.qub.ac.uk/en/publications/cfc15ede-761c-49f3-a4e3-e97492ba2d8d https://doi.org/10.1016/j.palaeo.2015.02.004 eng eng info:eu-repo/semantics/closedAccess Swindles , G T , Amesbury , M J , Turner , T E , Carrivick , J L , Woulds , C , Raby , C , Mullan , D , Roland , T P , Galloway , J M , Parry , L , Kokfelt , U , Garneau , M , Charman , D J & Holden , J 2015 , ' Evaluating the use of testate amoebae for palaeohydrological reconstruction in permafrost peatlands ' , Palaeogeography, Palaeoclimatology, Palaeoecology , vol. 424 , pp. 111-122 . https://doi.org/10.1016/j.palaeo.2015.02.004 /dk/atira/pure/sustainabledevelopmentgoals/climate_action SDG 13 - Climate Action article 2015 ftqueensubelpubl https://doi.org/10.1016/j.palaeo.2015.02.004 2023-12-21T23:26:55Z The melting of high-latitude permafrost peatlands is a major concern due to a potential positive feedback on global climate change. We examine the ecology of testate amoebae in permafrost peatlands, based on sites in Sweden (~ 200 km north of the Arctic Circle). Multivariate statistical analysis confirms that water-table depth and moisture content are the dominant controls on the distribution of testate amoebae, corroborating the results from studies in mid-latitude peatlands. We present a new testate amoeba-based water table transfer function and thoroughly test it for the effects of spatial autocorrelation, clustered sampling design and uneven sampling gradients. We find that the transfer function has good predictive power; the best-performing model is based on tolerance-downweighted weighted averaging with inverse deshrinking (performance statistics with leave-one-out cross validation: R2 = 0.87, RMSEP = 5.25 cm). The new transfer function was applied to a short core from Stordalen mire, and reveals a major shift in peatland ecohydrology coincident with the onset of the Little Ice Age (c. AD 1400). We also applied the model to an independent contemporary dataset from Stordalen and find that it outperforms predictions based on other published transfer functions. The new transfer function will enable palaeohydrological reconstruction from permafrost peatlands in Northern Europe, thereby permitting greatly improved understanding of the long-term ecohydrological dynamics of these important carbon stores as well as their responses to recent climate change. Article in Journal/Newspaper Arctic Climate change Ice permafrost Queen's University Belfast Research Portal Arctic Stordalen ENVELOPE(7.337,7.337,62.510,62.510) Palaeogeography, Palaeoclimatology, Palaeoecology 424 111 122 |
institution |
Open Polar |
collection |
Queen's University Belfast Research Portal |
op_collection_id |
ftqueensubelpubl |
language |
English |
topic |
/dk/atira/pure/sustainabledevelopmentgoals/climate_action SDG 13 - Climate Action |
spellingShingle |
/dk/atira/pure/sustainabledevelopmentgoals/climate_action SDG 13 - Climate Action Swindles, Graeme T. Amesbury, Matthew J. Turner, T. Edward Carrivick, Jonathan L. Woulds, Clare Raby, Cassandra Mullan, Donal Roland, Thomas P. Galloway, Jennifer M. Parry, Lauren Kokfelt, Ulla Garneau, Michelle Charman, Dan J. Holden, Joseph Evaluating the use of testate amoebae for palaeohydrological reconstruction in permafrost peatlands |
topic_facet |
/dk/atira/pure/sustainabledevelopmentgoals/climate_action SDG 13 - Climate Action |
description |
The melting of high-latitude permafrost peatlands is a major concern due to a potential positive feedback on global climate change. We examine the ecology of testate amoebae in permafrost peatlands, based on sites in Sweden (~ 200 km north of the Arctic Circle). Multivariate statistical analysis confirms that water-table depth and moisture content are the dominant controls on the distribution of testate amoebae, corroborating the results from studies in mid-latitude peatlands. We present a new testate amoeba-based water table transfer function and thoroughly test it for the effects of spatial autocorrelation, clustered sampling design and uneven sampling gradients. We find that the transfer function has good predictive power; the best-performing model is based on tolerance-downweighted weighted averaging with inverse deshrinking (performance statistics with leave-one-out cross validation: R2 = 0.87, RMSEP = 5.25 cm). The new transfer function was applied to a short core from Stordalen mire, and reveals a major shift in peatland ecohydrology coincident with the onset of the Little Ice Age (c. AD 1400). We also applied the model to an independent contemporary dataset from Stordalen and find that it outperforms predictions based on other published transfer functions. The new transfer function will enable palaeohydrological reconstruction from permafrost peatlands in Northern Europe, thereby permitting greatly improved understanding of the long-term ecohydrological dynamics of these important carbon stores as well as their responses to recent climate change. |
format |
Article in Journal/Newspaper |
author |
Swindles, Graeme T. Amesbury, Matthew J. Turner, T. Edward Carrivick, Jonathan L. Woulds, Clare Raby, Cassandra Mullan, Donal Roland, Thomas P. Galloway, Jennifer M. Parry, Lauren Kokfelt, Ulla Garneau, Michelle Charman, Dan J. Holden, Joseph |
author_facet |
Swindles, Graeme T. Amesbury, Matthew J. Turner, T. Edward Carrivick, Jonathan L. Woulds, Clare Raby, Cassandra Mullan, Donal Roland, Thomas P. Galloway, Jennifer M. Parry, Lauren Kokfelt, Ulla Garneau, Michelle Charman, Dan J. Holden, Joseph |
author_sort |
Swindles, Graeme T. |
title |
Evaluating the use of testate amoebae for palaeohydrological reconstruction in permafrost peatlands |
title_short |
Evaluating the use of testate amoebae for palaeohydrological reconstruction in permafrost peatlands |
title_full |
Evaluating the use of testate amoebae for palaeohydrological reconstruction in permafrost peatlands |
title_fullStr |
Evaluating the use of testate amoebae for palaeohydrological reconstruction in permafrost peatlands |
title_full_unstemmed |
Evaluating the use of testate amoebae for palaeohydrological reconstruction in permafrost peatlands |
title_sort |
evaluating the use of testate amoebae for palaeohydrological reconstruction in permafrost peatlands |
publishDate |
2015 |
url |
https://pure.qub.ac.uk/en/publications/cfc15ede-761c-49f3-a4e3-e97492ba2d8d https://doi.org/10.1016/j.palaeo.2015.02.004 |
long_lat |
ENVELOPE(7.337,7.337,62.510,62.510) |
geographic |
Arctic Stordalen |
geographic_facet |
Arctic Stordalen |
genre |
Arctic Climate change Ice permafrost |
genre_facet |
Arctic Climate change Ice permafrost |
op_source |
Swindles , G T , Amesbury , M J , Turner , T E , Carrivick , J L , Woulds , C , Raby , C , Mullan , D , Roland , T P , Galloway , J M , Parry , L , Kokfelt , U , Garneau , M , Charman , D J & Holden , J 2015 , ' Evaluating the use of testate amoebae for palaeohydrological reconstruction in permafrost peatlands ' , Palaeogeography, Palaeoclimatology, Palaeoecology , vol. 424 , pp. 111-122 . https://doi.org/10.1016/j.palaeo.2015.02.004 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1016/j.palaeo.2015.02.004 |
container_title |
Palaeogeography, Palaeoclimatology, Palaeoecology |
container_volume |
424 |
container_start_page |
111 |
op_container_end_page |
122 |
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1788059288083628032 |