Krill (Euphausia superba) distribution contracts southward during rapid regional warming
High-latitude ecosystems are among the fastest warming on the planet1. Polar species may be sensitive to warming and ice loss, but data are scarce and evidence is conflicting2,3,4. Here, we show that, within their main population centre in the southwest Atlantic sector, the distribution of Euphausia...
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ftnerc:oai:nora.nerc.ac.uk:518623 2023-05-15T13:49:34+02:00 Krill (Euphausia superba) distribution contracts southward during rapid regional warming Atkinson, Angus Hill, Simeon L. Pakhomov, Evgeny A. Siegel, Volker Reiss, Christian S. Loeb, Valerie J. Steinberg, Deborah K. Schmidt, Katrin Tarling, Geraint A. Gerrish, Laura Sailley, Sevrine F. 2019-01-21 text http://nora.nerc.ac.uk/id/eprint/518623/ https://nora.nerc.ac.uk/id/eprint/518623/1/ATKINSON%202019%20for%20NORA%20%28002%29.pdf https://www.nature.com/articles/s41558-018-0370-z#Ack1 en eng Springer Nature https://nora.nerc.ac.uk/id/eprint/518623/1/ATKINSON%202019%20for%20NORA%20%28002%29.pdf Atkinson, Angus; Hill, Simeon L. orcid:0000-0003-1441-8769 Pakhomov, Evgeny A.; Siegel, Volker; Reiss, Christian S.; Loeb, Valerie J.; Steinberg, Deborah K.; Schmidt, Katrin; Tarling, Geraint A. orcid:0000-0002-3753-5899 Gerrish, Laura orcid:0000-0003-1410-9122 Sailley, Sevrine F. 2019 Krill (Euphausia superba) distribution contracts southward during rapid regional warming. Nature Climate Change, 9 (2). 142-147. https://doi.org/10.1038/s41558-018-0370-z <https://doi.org/10.1038/s41558-018-0370-z> Publication - Article PeerReviewed 2019 ftnerc https://doi.org/10.1038/s41558-018-0370-z 2023-02-04T19:45:46Z High-latitude ecosystems are among the fastest warming on the planet1. Polar species may be sensitive to warming and ice loss, but data are scarce and evidence is conflicting2,3,4. Here, we show that, within their main population centre in the southwest Atlantic sector, the distribution of Euphausia superba (hereafter, ‘krill’) has contracted southward over the past 90 years. Near their northern limit, numerical densities have declined sharply and the population has become more concentrated towards the Antarctic shelves. A concomitant increase in mean body length reflects reduced recruitment of juvenile krill. We found evidence for environmental controls on recruitment, including a reduced density of juveniles following positive anomalies of the Southern Annular Mode. Such anomalies are associated with warm, windy and cloudy weather and reduced sea ice, all of which may hinder egg production and the survival of larval krill5. However, the total post-larval density has declined less steeply than the density of recruits, suggesting that survival rates of older krill have increased. The changing distribution is already perturbing the krill-centred food web6 and may affect biogeochemical cycling7,8. Rapid climate change, with associated nonlinear adjustments in the roles of keystone species, poses challenges for the management of valuable polar ecosystems3. Article in Journal/Newspaper Antarc* Antarctic Euphausia superba Sea ice Natural Environment Research Council: NERC Open Research Archive Antarctic The Antarctic Nature Climate Change 9 2 142 147 |
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Open Polar |
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Natural Environment Research Council: NERC Open Research Archive |
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ftnerc |
language |
English |
description |
High-latitude ecosystems are among the fastest warming on the planet1. Polar species may be sensitive to warming and ice loss, but data are scarce and evidence is conflicting2,3,4. Here, we show that, within their main population centre in the southwest Atlantic sector, the distribution of Euphausia superba (hereafter, ‘krill’) has contracted southward over the past 90 years. Near their northern limit, numerical densities have declined sharply and the population has become more concentrated towards the Antarctic shelves. A concomitant increase in mean body length reflects reduced recruitment of juvenile krill. We found evidence for environmental controls on recruitment, including a reduced density of juveniles following positive anomalies of the Southern Annular Mode. Such anomalies are associated with warm, windy and cloudy weather and reduced sea ice, all of which may hinder egg production and the survival of larval krill5. However, the total post-larval density has declined less steeply than the density of recruits, suggesting that survival rates of older krill have increased. The changing distribution is already perturbing the krill-centred food web6 and may affect biogeochemical cycling7,8. Rapid climate change, with associated nonlinear adjustments in the roles of keystone species, poses challenges for the management of valuable polar ecosystems3. |
format |
Article in Journal/Newspaper |
author |
Atkinson, Angus Hill, Simeon L. Pakhomov, Evgeny A. Siegel, Volker Reiss, Christian S. Loeb, Valerie J. Steinberg, Deborah K. Schmidt, Katrin Tarling, Geraint A. Gerrish, Laura Sailley, Sevrine F. |
spellingShingle |
Atkinson, Angus Hill, Simeon L. Pakhomov, Evgeny A. Siegel, Volker Reiss, Christian S. Loeb, Valerie J. Steinberg, Deborah K. Schmidt, Katrin Tarling, Geraint A. Gerrish, Laura Sailley, Sevrine F. Krill (Euphausia superba) distribution contracts southward during rapid regional warming |
author_facet |
Atkinson, Angus Hill, Simeon L. Pakhomov, Evgeny A. Siegel, Volker Reiss, Christian S. Loeb, Valerie J. Steinberg, Deborah K. Schmidt, Katrin Tarling, Geraint A. Gerrish, Laura Sailley, Sevrine F. |
author_sort |
Atkinson, Angus |
title |
Krill (Euphausia superba) distribution contracts southward during rapid regional warming |
title_short |
Krill (Euphausia superba) distribution contracts southward during rapid regional warming |
title_full |
Krill (Euphausia superba) distribution contracts southward during rapid regional warming |
title_fullStr |
Krill (Euphausia superba) distribution contracts southward during rapid regional warming |
title_full_unstemmed |
Krill (Euphausia superba) distribution contracts southward during rapid regional warming |
title_sort |
krill (euphausia superba) distribution contracts southward during rapid regional warming |
publisher |
Springer Nature |
publishDate |
2019 |
url |
http://nora.nerc.ac.uk/id/eprint/518623/ https://nora.nerc.ac.uk/id/eprint/518623/1/ATKINSON%202019%20for%20NORA%20%28002%29.pdf https://www.nature.com/articles/s41558-018-0370-z#Ack1 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Euphausia superba Sea ice |
genre_facet |
Antarc* Antarctic Euphausia superba Sea ice |
op_relation |
https://nora.nerc.ac.uk/id/eprint/518623/1/ATKINSON%202019%20for%20NORA%20%28002%29.pdf Atkinson, Angus; Hill, Simeon L. orcid:0000-0003-1441-8769 Pakhomov, Evgeny A.; Siegel, Volker; Reiss, Christian S.; Loeb, Valerie J.; Steinberg, Deborah K.; Schmidt, Katrin; Tarling, Geraint A. orcid:0000-0002-3753-5899 Gerrish, Laura orcid:0000-0003-1410-9122 Sailley, Sevrine F. 2019 Krill (Euphausia superba) distribution contracts southward during rapid regional warming. Nature Climate Change, 9 (2). 142-147. https://doi.org/10.1038/s41558-018-0370-z <https://doi.org/10.1038/s41558-018-0370-z> |
op_doi |
https://doi.org/10.1038/s41558-018-0370-z |
container_title |
Nature Climate Change |
container_volume |
9 |
container_issue |
2 |
container_start_page |
142 |
op_container_end_page |
147 |
_version_ |
1766251727610183680 |