Differences in cold and drought tolerance of high arctic and sub-arctic populations of Megaphorura arctica Tullberg 1876 (Onychiuridae: Collembola)
Udgivelsesdato: 2007-Dec The springtail Megaphorura arctica (Onychiuridae: Collembola) inhabits the arctic and sub-arctic parts of the northern hemisphere where it on a seasonal basis will be exposed to severe cold and desiccating conditions. In the present study we compared how traits of stress res...
Published in: | Cryobiology |
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Main Authors: | , , , , |
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Language: | English |
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2007
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Online Access: | https://pure.au.dk/portal/da/publications/differences-in-cold-and-drought-tolerance-of-high-arctic-and-subarctic-populations-of-megaphorura-arctica-tullberg-1876-onychiuridae-collembola(b54225f0-f374-11dd-8f9a-000ea68e967b).html https://doi.org/10.1016/j.cryobiol.2007.09.001 |
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ftuniaarhuspubl:oai:pure.atira.dk:publications/b54225f0-f374-11dd-8f9a-000ea68e967b 2023-05-15T13:08:34+02:00 Differences in cold and drought tolerance of high arctic and sub-arctic populations of Megaphorura arctica Tullberg 1876 (Onychiuridae: Collembola) Bahrndorff, S Petersen, S O Loeschcke, V Holmstrup, M Overgaard, Johannes 2007 https://pure.au.dk/portal/da/publications/differences-in-cold-and-drought-tolerance-of-high-arctic-and-subarctic-populations-of-megaphorura-arctica-tullberg-1876-onychiuridae-collembola(b54225f0-f374-11dd-8f9a-000ea68e967b).html https://doi.org/10.1016/j.cryobiol.2007.09.001 eng eng info:eu-repo/semantics/restrictedAccess Bahrndorff , S , Petersen , S O , Loeschcke , V , Holmstrup , M & Overgaard , J 2007 , ' Differences in cold and drought tolerance of high arctic and sub-arctic populations of Megaphorura arctica Tullberg 1876 (Onychiuridae: Collembola) ' , Cryobiology , vol. 55 , no. 3 , pp. 315-23 . https://doi.org/10.1016/j.cryobiol.2007.09.001 Adaptation Physiological Animals Arctic Regions Arthropods Body Water Body Weight Cold Temperature Cryoprotective Agents Dehydration Disasters Fatty Acids Glucose Humidity Iceland Trehalose article 2007 ftuniaarhuspubl https://doi.org/10.1016/j.cryobiol.2007.09.001 2020-07-18T20:54:59Z Udgivelsesdato: 2007-Dec The springtail Megaphorura arctica (Onychiuridae: Collembola) inhabits the arctic and sub-arctic parts of the northern hemisphere where it on a seasonal basis will be exposed to severe cold and desiccating conditions. In the present study we compared how traits of stress resistance differed between two populations of M. arctica that were collected at a high arctic site (Spitsbergen) and a sub-arctic site (Akureyri, Iceland) with contrasting thermal environments. In addition we investigated how cold and desiccation affected the phospholipid fatty acid composition of M. arctica from Spitsbergen. The springtails from Spitsbergen were the most cold tolerant and this was linked to an almost three times higher level of trehalose accumulation during cryoprotective dehydration (15% and 5% of tissue dry weight in the Spitsbergen and Iceland populations, respectively). Although cryoprotective dehydration is intimately related to desiccation stress it was shown that M. arctica had a higher mortality when dehydrated over ice (-10 or -20 degrees C) than when dehydrated at temperatures above 1 degrees C. Thus, survival was lower after exposure to -10 degrees C than after exposure to a relative humidity of 91.2% RH at +1 degrees C although both treatments led to the same level of dehydration. Exposure to both cold (-10 and -20 degrees C) and desiccation at +1 degrees C caused significant changes in the phospholipid fatty acid composition with some similarities. These changes included a decrease in average chain length of the fatty acids due primarily to an increase in the phospholipid fatty acids 16:0 and a decrease in 18:3 and 20:4 omega6. Article in Journal/Newspaper Akureyri Akureyri Akureyri Arctic Arctic Iceland Spitsbergen Springtail Aarhus University: Research Akureyri Arctic Cryobiology 55 3 315 323 |
institution |
Open Polar |
collection |
Aarhus University: Research |
op_collection_id |
ftuniaarhuspubl |
language |
English |
topic |
Adaptation Physiological Animals Arctic Regions Arthropods Body Water Body Weight Cold Temperature Cryoprotective Agents Dehydration Disasters Fatty Acids Glucose Humidity Iceland Trehalose |
spellingShingle |
Adaptation Physiological Animals Arctic Regions Arthropods Body Water Body Weight Cold Temperature Cryoprotective Agents Dehydration Disasters Fatty Acids Glucose Humidity Iceland Trehalose Bahrndorff, S Petersen, S O Loeschcke, V Holmstrup, M Overgaard, Johannes Differences in cold and drought tolerance of high arctic and sub-arctic populations of Megaphorura arctica Tullberg 1876 (Onychiuridae: Collembola) |
topic_facet |
Adaptation Physiological Animals Arctic Regions Arthropods Body Water Body Weight Cold Temperature Cryoprotective Agents Dehydration Disasters Fatty Acids Glucose Humidity Iceland Trehalose |
description |
Udgivelsesdato: 2007-Dec The springtail Megaphorura arctica (Onychiuridae: Collembola) inhabits the arctic and sub-arctic parts of the northern hemisphere where it on a seasonal basis will be exposed to severe cold and desiccating conditions. In the present study we compared how traits of stress resistance differed between two populations of M. arctica that were collected at a high arctic site (Spitsbergen) and a sub-arctic site (Akureyri, Iceland) with contrasting thermal environments. In addition we investigated how cold and desiccation affected the phospholipid fatty acid composition of M. arctica from Spitsbergen. The springtails from Spitsbergen were the most cold tolerant and this was linked to an almost three times higher level of trehalose accumulation during cryoprotective dehydration (15% and 5% of tissue dry weight in the Spitsbergen and Iceland populations, respectively). Although cryoprotective dehydration is intimately related to desiccation stress it was shown that M. arctica had a higher mortality when dehydrated over ice (-10 or -20 degrees C) than when dehydrated at temperatures above 1 degrees C. Thus, survival was lower after exposure to -10 degrees C than after exposure to a relative humidity of 91.2% RH at +1 degrees C although both treatments led to the same level of dehydration. Exposure to both cold (-10 and -20 degrees C) and desiccation at +1 degrees C caused significant changes in the phospholipid fatty acid composition with some similarities. These changes included a decrease in average chain length of the fatty acids due primarily to an increase in the phospholipid fatty acids 16:0 and a decrease in 18:3 and 20:4 omega6. |
format |
Article in Journal/Newspaper |
author |
Bahrndorff, S Petersen, S O Loeschcke, V Holmstrup, M Overgaard, Johannes |
author_facet |
Bahrndorff, S Petersen, S O Loeschcke, V Holmstrup, M Overgaard, Johannes |
author_sort |
Bahrndorff, S |
title |
Differences in cold and drought tolerance of high arctic and sub-arctic populations of Megaphorura arctica Tullberg 1876 (Onychiuridae: Collembola) |
title_short |
Differences in cold and drought tolerance of high arctic and sub-arctic populations of Megaphorura arctica Tullberg 1876 (Onychiuridae: Collembola) |
title_full |
Differences in cold and drought tolerance of high arctic and sub-arctic populations of Megaphorura arctica Tullberg 1876 (Onychiuridae: Collembola) |
title_fullStr |
Differences in cold and drought tolerance of high arctic and sub-arctic populations of Megaphorura arctica Tullberg 1876 (Onychiuridae: Collembola) |
title_full_unstemmed |
Differences in cold and drought tolerance of high arctic and sub-arctic populations of Megaphorura arctica Tullberg 1876 (Onychiuridae: Collembola) |
title_sort |
differences in cold and drought tolerance of high arctic and sub-arctic populations of megaphorura arctica tullberg 1876 (onychiuridae: collembola) |
publishDate |
2007 |
url |
https://pure.au.dk/portal/da/publications/differences-in-cold-and-drought-tolerance-of-high-arctic-and-subarctic-populations-of-megaphorura-arctica-tullberg-1876-onychiuridae-collembola(b54225f0-f374-11dd-8f9a-000ea68e967b).html https://doi.org/10.1016/j.cryobiol.2007.09.001 |
geographic |
Akureyri Arctic |
geographic_facet |
Akureyri Arctic |
genre |
Akureyri Akureyri Akureyri Arctic Arctic Iceland Spitsbergen Springtail |
genre_facet |
Akureyri Akureyri Akureyri Arctic Arctic Iceland Spitsbergen Springtail |
op_source |
Bahrndorff , S , Petersen , S O , Loeschcke , V , Holmstrup , M & Overgaard , J 2007 , ' Differences in cold and drought tolerance of high arctic and sub-arctic populations of Megaphorura arctica Tullberg 1876 (Onychiuridae: Collembola) ' , Cryobiology , vol. 55 , no. 3 , pp. 315-23 . https://doi.org/10.1016/j.cryobiol.2007.09.001 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.cryobiol.2007.09.001 |
container_title |
Cryobiology |
container_volume |
55 |
container_issue |
3 |
container_start_page |
315 |
op_container_end_page |
323 |
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1766098108712747008 |