Welcome   Sponsored By
Subscribe | Register | Advertise | Newsletter | About us | Contact us
   


Image: Hafogvatn / Marine & Freshwater Research Institute (Iceland)

Regime shift in marine ecosystem off Southeast Greenland

Click on the flag for more information about Iceland ICELAND
Tuesday, December 06, 2022, 07:00 (GMT + 9)

Findings of unexpected large numbers of fin and humpback whales during recent years in the previously ice infested waters of East Greenland indicate a tipping point in the marine ecosystem from one regime to another that may be irreversible.
 
The sub-arctic ecosystem off Southeast Greenland dominated by large amounts of drifting pack ice has changed during this century to a more temperate system with less sea ice and warmer ocean temperatures. These changes in summer ocean conditions are making the region more attractive for large numbers of fin and humpback whales, as well as mackerel, bluefin tuna and other pelagic fish species, while e.g. narwhales and walruses have largely retreated from the region.
 
Extent of sea ice in the North Atlantic in August 1938 during a warm period (DMI, 1939). Note the continuous belt of ice along East Greenland that reaches up along the southern coast of West Greenland (the so-called “Storis”). Courtesy from Wiley Online Library >>>>
 
Dramatic ecological changes such as these are considered regime shifts in the ecological literature. Shifts from one regime to another occur at a tipping point and may be irreversible. The regime shift has cascading effects throughout the ecosystem.
 
These are the conclusions in a new scientific study published in the internationally peer-reviewed scientific journal Global Change Biology. The study was led by Mads Peter Heide Jørgensen at the Greenland Institute of Natural Resources, Denmark, in cooperation with researchers from Denmark, Greenland, USA and Iceland. Two coauthors from the Marine and Freshwater Research Institute in Iceland contributed to the study, Gísli Víkingsson, expert on cetaceans, and physical oceanographer Andreas Macrander.
 
Index of sea ice extent at Southeast Greenland 1820 – 2021, and illustration of changes in cetacean distribution during recent years (Image: Hafogvatn)
 
The study combines a vast set of long-term observations, including stock assessment and distribution of whale and fish species, sea ice, and hydrographic data. Data of the Faxaflói 9 station collected over the past 50 years by MFRI during the regular ástand sjávar cruises were used to assess recent changes in temperature and salinity of the Irminger Sea. Mackerel and capelin survey data from MFRI permitted to map changing distribution of pelagic fish corresponding with increasing temperatures of the ocean.
 
Upper panel: Loess plots of the time series of the index of abundance of two pelagic fish species, mackerel and capelin in the Irminger Sea. Data from Post et al. (2021). Lower panels: Catches of Atlantic bluefin tuna in the Irminger Sea (data from Jansen, Nielsen, et al. (2021)) and catches of four seal species at Tasiilaq (data from Anon, 1983–1992 and the Greenland Directorate for Fisheries, Hunting and Agriculture). Red dots indicate that there is no information on the presence or catches. Courtesy from Wiley Online Library
 
The sea ice retreat off South-East Greenland is unprecedented in the past 200 years of summer ice observations in the region. “The new regime will likely become permanent for the foreseeable future, unless temperatures cool and the ice export from the north increases again. According to recent IPCC reports, continued 21st century climate change make this scenario unlikely,” says Professor Mads Peter Heide-Jørgensen, Greenland Institute of Natural Resources.
 
Changes in sea ice conditions in East Greenland. Upper panel: Temporal variability in the summer averaged Storis Index (June–July–August) since 1900 together with regime-specific means identified by a sequential regime shift detection algorithm (Rodionov, 2016; Rodionov & Overland, 2005). The indices for the series starting in 1900 are standardized indices derived using averages for the period 1900–2021. Black line with dots: standardized Storis Index for June–August; red line: regime-specific means.  Middle panel: Linear trends in sea ice concentration in SEG (see Figure S1 for delineation of SEG) and the occurrence of Storis after 1979. If the outlier in sea ice concentration from 2020 is excluded the p-value drops to .01. Lower panel: Loess plots of the trends in the annual export of sea ice (area and volume) from the Fram Strait during 1979–2019. The regime shift is shown in red for the ice volume plot.  Courtesy from Wiley Online Library
 
The study is part of the EU funded ECOTIP and a Nordic Council project investigating links between changing oceanographic conditions and fisheries in East Greenland (AG-Fisk LEGCO). ECOTIP focuses on tipping elements in the marine environment of the North Atlantic.


 Print


Click to know how to advertise in FIS
MORE NEWS



Lenguaje
FEATURED EVENTS
  
TOP STORIES
Sustainable fisheries: EFCA presents new patrol vessels
European Union Today, the European Fisheries Control Agency (EFCA) presented three new patrol vessels that will strengthen fisheries inspections in European and international waters. European Commissioner for Envir...
'This Olympic race on shrimp is not good for anyone'
Argentina Eduardo Boiero is the president of CAPeCA, the chamber that brings together most of the historical pole boats that developed the fishery. In this interview he talks about the shrimp quota, not only as...
Commercial fishing through auctions
Ukraine The beginning of 2023 was marked for the fishing industry by significant changes in the processing of permits for commercial fishing. "One of the main goals of the implementation of the experi...
Cocaine in a tuna can container headed for the UK
Ecuador Ecuadorian authorities managed to seize 924 packages of cocaine destined for Great Britain. The drug was hidden in a container that intended to leave from one of the Guayaquil seaports. In addition to...
 

Maruha Nichiro Corporation
Nichirei Corporation - Headquarters
Pesquera El Golfo S.A.
Ventisqueros - Productos del Mar Ventisqueros S.A
Wärtsilä Corporation - Wartsila Group Headquarters
ITOCHU Corporation - Headquarters
BAADER - Nordischer Maschinenbau Rud. Baader GmbH+Co.KG (Head Office)
Inmarsat plc - Global Headquarters
Marks & Spencer
Tesco PLC (Supermarket) - Headquarters
Sea Harvest Corporation (PTY) Ltd. - Group Headquarters
I&J - Irvin & Johnson Holding Company (Pty) Ltd.
AquaChile S.A. - Group Headquarters
Pesquera San Jose S.A.
Nutreco N.V. - Head Office
CNFC China National Fisheries Corporation - Group Headquarters
W. van der Zwan & Zn. B.V.
SMMI - Sunderland Marine Mutual Insurance Co., Ltd. - Headquarters
Icicle Seafoods, Inc
Starkist Seafood Co. - Headquearters
Trident Seafoods Corp.
American Seafoods Group LLC - Head Office
Marel - Group Headquarters
SalMar ASA - Group Headquarters
Sajo Industries Co., Ltd
Hansung Enterprise Co.,Ltd.
BIM - Irish Sea Fisheries Board (An Bord Iascaigh Mhara)
CEFAS - Centre for Environment, Fisheries & Aquaculture Science
COPEINCA ASA - Corporacion Pesquera Inca S.A.C.
Chun Cheng Fishery Enterprise Pte Ltd.
VASEP - Vietnam Association of Seafood Exporters & Producers
Gomes da Costa
Furuno Electric Co., Ltd. (Headquarters)
NISSUI - Nippon Suisan Kaisha, Ltd. - Group Headquarters
FAO - Food and Agriculture Organization - Fisheries and Aquaculture Department (Headquarter)
Hagoromo Foods Co., Ltd.
Koden Electronics Co., Ltd. (Headquarters)
A.P. Møller - Maersk A/S - Headquarters
BVQI - Bureau Veritas Quality International (Head Office)
UPS - United Parcel Service, Inc. - Headquarters
Brim ehf (formerly HB Grandi Ltd) - Headquarters
Hamburg Süd Group - (Headquearters)
Armadora Pereira S.A. - Grupo Pereira Headquarters
Costa Meeresspezialitäten GmbH & Co. KG
NOAA - National Oceanic and Atmospheric Administration (Headquarters)
Mowi ASA (formerly Marine Harvest ASA) - Headquarters
Marubeni Europe Plc -UK-
Findus Ltd
Icom Inc. (Headquarter)
WWF Centroamerica
Oceana Group Limited
The David and Lucile Packard Foundation
Ajinomoto Co., Inc. - Headquarters
Friosur S.A. - Headquarters
Cargill, Incorporated - Global Headquarters
Benihana Inc.
Leardini Pescados Ltda
CJ Corporation  - Group Headquarters
Greenpeace International - The Netherlands | Headquarters
David Suzuki Foundation
Fisheries and Oceans Canada -Communications Branch-
Mitsui & Co.,Ltd - Headquarters
NOREBO Group (former Ocean Trawlers Group)
Natori Co., Ltd.
Carrefour Supermarket - Headquarters
FedEx Corporation - Headquarters
Cooke Inc. - Group Headquarters
AKBM - Aker BioMarine ASA
Seafood Choices Alliance -Headquarter-
Austevoll Seafood ASA
Walmart | Wal-Mart Stores, Inc. (Supermarket) - Headquarters
New Japan Radio Co.Ltd (JRC) -Head Office-
Gulfstream JSC
Marine Stewardship Council - MSC Worldwide Headquarters
Royal Dutch Shell plc (Headquarter)
Genki Sushi Co.,Ltd -Headquarter-
Iceland Pelagic ehf
AXA Assistance Argentina S.A.
Caterpillar Inc. - Headquarters
Tiger Brands Limited
SeaChoice
National Geographic Society
AmazonFresh, LLC - AmazonFresh

Copyright 1995 - 2023 Seafood Media Group Ltd.| All Rights Reserved.   DISCLAIMER