Variability of Salpa thompsoni population structure in the Drake Passage in summer season 2010
Abstract Dynamic climate changes have become noticeable in recent decades, especially in the vulnerable region of the West Antarctic. The relatively simple food web of this area relies on krill – Euphausia superba . Presumably, as a result of climatic fluctuations, a decrease in the number of this c...
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Walter de Gruyter GmbH
2015
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crdegruyter:10.1515/popore-2015-0020 2024-09-15T17:41:45+00:00 Variability of Salpa thompsoni population structure in the Drake Passage in summer season 2010 Słomska, Angelika W. Panasiuk-Chodnicka, Anna A. Żmijewska, Maria I. Mańko, Maciej K. 2015 http://dx.doi.org/10.1515/popore-2015-0020 http://content.sciendo.com/view/journals/popore/36/4/article-p391.xml https://www.degruyter.com/view/j/popore.2015.36.issue-4/popore-2015-0020/popore-2015-0020.pdf unknown Walter de Gruyter GmbH http://creativecommons.org/licenses/by-nc-nd/3.0 Polish Polar Research volume 36, issue 4, page 391-404 ISSN 2081-8262 journal-article 2015 crdegruyter https://doi.org/10.1515/popore-2015-0020 2024-07-29T04:11:22Z Abstract Dynamic climate changes have become noticeable in recent decades, especially in the vulnerable region of the West Antarctic. The relatively simple food web of this area relies on krill – Euphausia superba . Presumably, as a result of climatic fluctuations, a decrease in the number of this crustacean has been recorded, followed by an increase in the population of the gelatinous zooplankter Salpa thompsoni . In the research presented herein, population and morphometric analyses of Salpa thompsoni have been conducted. Specimens for this research were collected from the Drake Passage, using a Bongo net in the summer season of 2010. It has been found that the horizontal distribution of this gelatinous zooplankter was significantly irregular (Kruskal-Wallis test, p < 0.001). In the northern part of the investigated area, both blastozooids and oozooids were recorded, which confirms the dynamic development of this species. The central part of the Drake Passage was characterized by the dominance of blastozooids, with embryos found at different stages of the development. Only in the region of the South Shetland Islands, the salpid population was characterized by reduced or even stopped reproduction. The immense reproductive efficiency observed in the Salpa thompsoni population was mostly induced by the favourable thermal conditions. These observations may suggest that the ongoing climat changes in the West Antarctic will promote the population expansion of this species. Article in Journal/Newspaper Antarc* Antarctic Drake Passage Euphausia superba Polar Research South Shetland Islands De Gruyter Polish Polar Research 36 4 391 404 |
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Open Polar |
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De Gruyter |
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crdegruyter |
language |
unknown |
description |
Abstract Dynamic climate changes have become noticeable in recent decades, especially in the vulnerable region of the West Antarctic. The relatively simple food web of this area relies on krill – Euphausia superba . Presumably, as a result of climatic fluctuations, a decrease in the number of this crustacean has been recorded, followed by an increase in the population of the gelatinous zooplankter Salpa thompsoni . In the research presented herein, population and morphometric analyses of Salpa thompsoni have been conducted. Specimens for this research were collected from the Drake Passage, using a Bongo net in the summer season of 2010. It has been found that the horizontal distribution of this gelatinous zooplankter was significantly irregular (Kruskal-Wallis test, p < 0.001). In the northern part of the investigated area, both blastozooids and oozooids were recorded, which confirms the dynamic development of this species. The central part of the Drake Passage was characterized by the dominance of blastozooids, with embryos found at different stages of the development. Only in the region of the South Shetland Islands, the salpid population was characterized by reduced or even stopped reproduction. The immense reproductive efficiency observed in the Salpa thompsoni population was mostly induced by the favourable thermal conditions. These observations may suggest that the ongoing climat changes in the West Antarctic will promote the population expansion of this species. |
format |
Article in Journal/Newspaper |
author |
Słomska, Angelika W. Panasiuk-Chodnicka, Anna A. Żmijewska, Maria I. Mańko, Maciej K. |
spellingShingle |
Słomska, Angelika W. Panasiuk-Chodnicka, Anna A. Żmijewska, Maria I. Mańko, Maciej K. Variability of Salpa thompsoni population structure in the Drake Passage in summer season 2010 |
author_facet |
Słomska, Angelika W. Panasiuk-Chodnicka, Anna A. Żmijewska, Maria I. Mańko, Maciej K. |
author_sort |
Słomska, Angelika W. |
title |
Variability of Salpa thompsoni population structure in the Drake Passage in summer season 2010 |
title_short |
Variability of Salpa thompsoni population structure in the Drake Passage in summer season 2010 |
title_full |
Variability of Salpa thompsoni population structure in the Drake Passage in summer season 2010 |
title_fullStr |
Variability of Salpa thompsoni population structure in the Drake Passage in summer season 2010 |
title_full_unstemmed |
Variability of Salpa thompsoni population structure in the Drake Passage in summer season 2010 |
title_sort |
variability of salpa thompsoni population structure in the drake passage in summer season 2010 |
publisher |
Walter de Gruyter GmbH |
publishDate |
2015 |
url |
http://dx.doi.org/10.1515/popore-2015-0020 http://content.sciendo.com/view/journals/popore/36/4/article-p391.xml https://www.degruyter.com/view/j/popore.2015.36.issue-4/popore-2015-0020/popore-2015-0020.pdf |
genre |
Antarc* Antarctic Drake Passage Euphausia superba Polar Research South Shetland Islands |
genre_facet |
Antarc* Antarctic Drake Passage Euphausia superba Polar Research South Shetland Islands |
op_source |
Polish Polar Research volume 36, issue 4, page 391-404 ISSN 2081-8262 |
op_rights |
http://creativecommons.org/licenses/by-nc-nd/3.0 |
op_doi |
https://doi.org/10.1515/popore-2015-0020 |
container_title |
Polish Polar Research |
container_volume |
36 |
container_issue |
4 |
container_start_page |
391 |
op_container_end_page |
404 |
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1810488008614346752 |