A regime shift in the Southeast Greenland marine ecosystem
Two major oceanographic changes have recently propagated through several trophic levels in coastal areas of Southeast Greenland (SEG). Firstly, the amount of drift-ice exported from the Fram Strait and transported with the East Greenland Current (EGC) has decreased significantly over the past two de...
Published in: | Global Change Biology |
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Main Authors: | , , , , , , , , , |
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Language: | English |
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2023
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Online Access: | https://orbit.dtu.dk/en/publications/299c796a-4ddb-4151-83b5-fc83c8bb892b https://doi.org/10.1111/gcb.16494 https://backend.orbit.dtu.dk/ws/files/302529741/Global_Change_Biology_2022_Heide_J_rgensen_A_regime_shift_in_the_Southeast_Greenland_marine_ecosystem.pdf |
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ftdtupubl:oai:pure.atira.dk:publications/299c796a-4ddb-4151-83b5-fc83c8bb892b 2024-09-15T18:04:22+00:00 A regime shift in the Southeast Greenland marine ecosystem Heide-Jørgensen, Mads Peter Chambault, Philippine Jansen, Teunis Gjelstrup, Caroline V. B. Rosing-Asvid, Aqqalu Macrander, Andreas Víkingsson, Gísli Zhang, Xiangdong Andresen, Camilla S. MacKenzie, Brian R. 2023 application/pdf https://orbit.dtu.dk/en/publications/299c796a-4ddb-4151-83b5-fc83c8bb892b https://doi.org/10.1111/gcb.16494 https://backend.orbit.dtu.dk/ws/files/302529741/Global_Change_Biology_2022_Heide_J_rgensen_A_regime_shift_in_the_Southeast_Greenland_marine_ecosystem.pdf eng eng https://orbit.dtu.dk/en/publications/299c796a-4ddb-4151-83b5-fc83c8bb892b info:eu-repo/semantics/openAccess Heide-Jørgensen , M P , Chambault , P , Jansen , T , Gjelstrup , C V B , Rosing-Asvid , A , Macrander , A , Víkingsson , G , Zhang , X , Andresen , C S & MacKenzie , B R 2023 , ' A regime shift in the Southeast Greenland marine ecosystem ' , Global Change Biology , vol. 29 , no. 3 , pp. 668-685 . https://doi.org/10.1111/gcb.16494 Biodiversity Habitat changes Ice volume expert Marine mammal Ocean warming Predation estimates Teleconnection Tipping element Tipping point /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water article 2023 ftdtupubl https://doi.org/10.1111/gcb.16494 2024-08-13T00:03:06Z Two major oceanographic changes have recently propagated through several trophic levels in coastal areas of Southeast Greenland (SEG). Firstly, the amount of drift-ice exported from the Fram Strait and transported with the East Greenland Current (EGC) has decreased significantly over the past two decades, and a main tipping element (summer sea ice) has virtually disappeared since 2003 leading to a regime shift in oceanographic and ecological conditions in the region. The following 20-year period with low or no coastal sea ice is unique in the 200-year history of ice observations in the region, and the regime shift is also obvious in the volume of ice export through the Fram Strait after 2013. In the same period, the temperature of the EGC south of 73.5 N has increased significantly (>2°C) since 1980. Secondly, the warm Irminger Current, which advects warm, saline Atlantic Water into the region, has become warmer since 1990. The lack of pack ice in summer together with a warming ocean generated cascading effects on the ecosystem in SEG that are manifested in a changed fish fauna with an influx of boreal species in the south and the subarctic capelin further north. At higher trophic levels there has been an increase in the abundance of several boreal cetaceans (humpback, fin, killer, and pilot whales and dolphins) that are either new to this area or occur in historically large numbers. It is estimated that the new cetacean species in SEG are responsible for an annual predation level of 700,000 tons of fish. In addition, predation on krill species is estimated at >1,500,000 tons mainly consumed by fin whales. Simultaneously, there has been a reduction in the abundance and catches of narwhals and walruses in SEG and it is suggested that these species have been impacted by the habitat changes. Article in Journal/Newspaper East Greenland east greenland current Fram Strait Greenland narwhal* Sea ice Subarctic walrus* Technical University of Denmark: DTU Orbit Global Change Biology 29 3 668 685 |
institution |
Open Polar |
collection |
Technical University of Denmark: DTU Orbit |
op_collection_id |
ftdtupubl |
language |
English |
topic |
Biodiversity Habitat changes Ice volume expert Marine mammal Ocean warming Predation estimates Teleconnection Tipping element Tipping point /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water |
spellingShingle |
Biodiversity Habitat changes Ice volume expert Marine mammal Ocean warming Predation estimates Teleconnection Tipping element Tipping point /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water Heide-Jørgensen, Mads Peter Chambault, Philippine Jansen, Teunis Gjelstrup, Caroline V. B. Rosing-Asvid, Aqqalu Macrander, Andreas Víkingsson, Gísli Zhang, Xiangdong Andresen, Camilla S. MacKenzie, Brian R. A regime shift in the Southeast Greenland marine ecosystem |
topic_facet |
Biodiversity Habitat changes Ice volume expert Marine mammal Ocean warming Predation estimates Teleconnection Tipping element Tipping point /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water |
description |
Two major oceanographic changes have recently propagated through several trophic levels in coastal areas of Southeast Greenland (SEG). Firstly, the amount of drift-ice exported from the Fram Strait and transported with the East Greenland Current (EGC) has decreased significantly over the past two decades, and a main tipping element (summer sea ice) has virtually disappeared since 2003 leading to a regime shift in oceanographic and ecological conditions in the region. The following 20-year period with low or no coastal sea ice is unique in the 200-year history of ice observations in the region, and the regime shift is also obvious in the volume of ice export through the Fram Strait after 2013. In the same period, the temperature of the EGC south of 73.5 N has increased significantly (>2°C) since 1980. Secondly, the warm Irminger Current, which advects warm, saline Atlantic Water into the region, has become warmer since 1990. The lack of pack ice in summer together with a warming ocean generated cascading effects on the ecosystem in SEG that are manifested in a changed fish fauna with an influx of boreal species in the south and the subarctic capelin further north. At higher trophic levels there has been an increase in the abundance of several boreal cetaceans (humpback, fin, killer, and pilot whales and dolphins) that are either new to this area or occur in historically large numbers. It is estimated that the new cetacean species in SEG are responsible for an annual predation level of 700,000 tons of fish. In addition, predation on krill species is estimated at >1,500,000 tons mainly consumed by fin whales. Simultaneously, there has been a reduction in the abundance and catches of narwhals and walruses in SEG and it is suggested that these species have been impacted by the habitat changes. |
format |
Article in Journal/Newspaper |
author |
Heide-Jørgensen, Mads Peter Chambault, Philippine Jansen, Teunis Gjelstrup, Caroline V. B. Rosing-Asvid, Aqqalu Macrander, Andreas Víkingsson, Gísli Zhang, Xiangdong Andresen, Camilla S. MacKenzie, Brian R. |
author_facet |
Heide-Jørgensen, Mads Peter Chambault, Philippine Jansen, Teunis Gjelstrup, Caroline V. B. Rosing-Asvid, Aqqalu Macrander, Andreas Víkingsson, Gísli Zhang, Xiangdong Andresen, Camilla S. MacKenzie, Brian R. |
author_sort |
Heide-Jørgensen, Mads Peter |
title |
A regime shift in the Southeast Greenland marine ecosystem |
title_short |
A regime shift in the Southeast Greenland marine ecosystem |
title_full |
A regime shift in the Southeast Greenland marine ecosystem |
title_fullStr |
A regime shift in the Southeast Greenland marine ecosystem |
title_full_unstemmed |
A regime shift in the Southeast Greenland marine ecosystem |
title_sort |
regime shift in the southeast greenland marine ecosystem |
publishDate |
2023 |
url |
https://orbit.dtu.dk/en/publications/299c796a-4ddb-4151-83b5-fc83c8bb892b https://doi.org/10.1111/gcb.16494 https://backend.orbit.dtu.dk/ws/files/302529741/Global_Change_Biology_2022_Heide_J_rgensen_A_regime_shift_in_the_Southeast_Greenland_marine_ecosystem.pdf |
genre |
East Greenland east greenland current Fram Strait Greenland narwhal* Sea ice Subarctic walrus* |
genre_facet |
East Greenland east greenland current Fram Strait Greenland narwhal* Sea ice Subarctic walrus* |
op_source |
Heide-Jørgensen , M P , Chambault , P , Jansen , T , Gjelstrup , C V B , Rosing-Asvid , A , Macrander , A , Víkingsson , G , Zhang , X , Andresen , C S & MacKenzie , B R 2023 , ' A regime shift in the Southeast Greenland marine ecosystem ' , Global Change Biology , vol. 29 , no. 3 , pp. 668-685 . https://doi.org/10.1111/gcb.16494 |
op_relation |
https://orbit.dtu.dk/en/publications/299c796a-4ddb-4151-83b5-fc83c8bb892b |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1111/gcb.16494 |
container_title |
Global Change Biology |
container_volume |
29 |
container_issue |
3 |
container_start_page |
668 |
op_container_end_page |
685 |
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1810441864749252608 |