Welcome to FIS   Sponsored By
United States
Subscribe to FIS | Register with FIS | Advertise with FIS | Newsletter | About FIS | Contact us

Shells of marine snails, known as pteropods, living in the seas around Antarctica. (Photo: Russ Hopcroft, UAF/NOAA)

Ocean acidification already taking its toll on Antarctic marine snails

Click on the flag for more information about United Kingdom UNITED KINGDOM
Tuesday, November 27, 2012, 23:20 (GMT + 9)

The shells of marine snails – known as pteropods – living in the seas around Antarctica are being dissolved by ocean acidification according to a new study published this week in the journal Nature Geoscience. These tiny animals are a valuable food source for fish and birds and play an important role in the oceanic carbon cycle.

During a science cruise in 2008, researchers from British Antarctic Survey (BAS) and the University of East Anglia (UEA), in collaboration with colleagues from the US Woods Hole Oceanographic Institution (WHOI) and the National Oceanic and Atmospheric Administration (NOAA), discovered severe dissolution of the shells of living pteropods in Southern Ocean waters.

The team examined an area of upwelling, where winds cause cold water to be pushed upwards from the deep to the surface of the ocean. Upwelled water is usually more corrosive to a particular type of calcium carbonate (aragonite) that pteropods use to build their shells. The team found that as a result of the additional influence of ocean acidification, this corrosive water severely dissolved the shells of pteropods.

Ocean acidification is caused by the uptake of carbon dioxide from the atmosphere emitted as a result of fossil fuel burning. A number of laboratory experiments have demonstrated the potential effect of ocean acidification on marine organisms.

However, to date, there has been little evidence of such impacts occurring to live specimens in their natural environment. The finding supports predictions that the impact of ocean acidification on marine ecosystems and food webs may be significant.

Lead author, Dr Nina Bednaršek, formerly of BAS and UEA, and now of NOAA says:

"We know that the seawater becomes more corrosive to aragonite shells below a certain depth – called the 'saturation horizon' – which occurs at around 1000m depth. However, at one of our sampling sites, we discovered that this point was reached at 200m depth, through a combination of natural upwelling and ocean acidification.

“Marine snails – pteropods – live in this top layer of the ocean. The corrosive properties of the water caused shells of live animals to be severely dissolved and this demonstrates how vulnerable pteropods are. Ocean acidification, resulting from the addition of human-induced carbon dioxide, contributed to this dissolution."

Seawater carbonate chemistry (Photo: NOAA)

Co-author and science cruise leader, Dr Geraint Tarling from BAS, says:

"Although the upwelling sites are natural phenomena that occur throughout the Southern Ocean, instances where they bring the 'saturation horizon' above 200m will become more frequent as ocean acidification intensifies in the coming years. As one of only a few oceanic creatures that build their shells out of aragonite in the polar regions, pteropods are an important food source for fish and birds as well as a good indicator of ecosystem health.

“The tiny snails do not necessarily die as a result of their shells dissolving, however it may increase their vulnerability to predation and infection consequently having an impact to other parts of the food web."

Co-author, Dr Dorothee Bakker from the University of East Anglia, says:

"Climate models project a continued intensification in Southern Ocean winds throughout the 21st century if atmospheric carbon dioxide continues to increase. […] Current predictions are for the 'saturation horizon' for aragonite to reach the upper surface layers of the Southern Ocean by 2050 in winter and by 2100 year round."

Related article:

Improving shellfish reaction estimates to ocean acidification



Click to know how to advertise in FIS
Oct 26, 03:20 (GMT + 9):
Action Plan to mass mortalities at salmon farming industry
Viet Nam
Oct 26, 02:50 (GMT + 9):
Consumer group inspected after controversial fish sauce quality
Oct 26, 02:30 (GMT + 9):
Anchovy management model considers human activities on Guadalquivir estuary
Oct 26, 01:40 (GMT + 9):
Fish farmers file appeal cage permit revocation
Oct 26, 01:10 (GMT + 9):
FAO recommends improvements to Fisheries Act
United States
Oct 26, 01:00 (GMT + 9):
IN BRIEF - New Bill to Promote Aquaculture Passes in Assembly and Senate
Oct 26, 01:00 (GMT + 9):
IN BRIEF - Kerala's aquaculture production in threat
United Nations
Oct 26, 01:00 (GMT + 9):
IN BRIEF - Fish farming is a part of the solution to reach the UN Sustainable Development Goals
Oct 26, 01:00 (GMT + 9):
IN BRIEF - ASF Challenging Province On Placentia Bay Aquaculture
Oct 26, 01:00 (GMT + 9):
IN BRIEF - Marine Harvest: Organizational change in Marine Harvest's Group management
United Kingdom
Oct 25, 23:50 (GMT + 9):
Climate change may make fish swim towards predators
Oct 25, 23:20 (GMT + 9):
Shrimp exports rebound
European Union
Oct 25, 22:00 (GMT + 9):
MEPs demand uniform rules and sanctions throughout the EU
Oct 25, 21:40 (GMT + 9):
Second Patagonian scallop annual assessment survey begins
Oct 25, 14:00 (GMT + 9):
IN BRIEF - Marine Harvest Organizational change in Marine Harvest's Group management

Brown seaweed harvest quota set
Peru The Ministry of Production has set the collection quota for the brown seaweed Lessonia trabeculata at 28.677 tonnes for the year 2016.
Joint Committee simplifies compulsory landing obligation in Morocco
Spain The Joint Committee on the fisheries agreement between the EU and Morocco has agreed to simplify the obligations concerning compulsory landings, with which Spanish ship owners will be able to more easily fulfill their landing obligation as to part of their catch.
Russian investor to build fish processing plants and cold storages
Indonesia Russian investor Blackspace is planning to invest in infrastructure construction for ice production, fish processing and cold storages on Natuna island, Indonesia.
Punjab to subsidy shrimp production to boost the sector
India Punjab Government intends to implement a series of measures to boost shrimp production in the state, including granting a 50 per cent subsidy.
Maruha Nichiro Corporation
Nichirei Corporation -Headquarter-
Pesquera El Golfo S.A.
Ventisqueros - Productos del Mar Ventisqueros S.A
Wärtsilä Corporation -Wartsila Group Headquarter-
ITOCHU Corporation -Headquarter-
BAADER - Nordischer Maschinenbau Rud. Baader GmbH+Co.KG (Head Office)
Inmarsat plc - Global Headquarters
Marks & Spencer
Tesco PLC (Supermarket) - Headquarters
Nueva Pescanova, S.L. - Group Headquarters
Sea Harvest Corporation (PTY) Ltd.
I&J - Irvin & Johnson Holding Company (Pty) Ltd.
Blue Continent Products (Pty) Ltd - (Oceana Group Limited)
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. -Headquarter-
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.
Food Project (Siam) Co., 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
Hamburg Süd Group - (Headquearters)
Armadora Pereira S.A. - Group Headquarters
NOAA - National Oceanic and Atmospheric Administration (Headquarters)
Omega Protein Corporation -Headquarter-
Marona S.A.
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. -Headquarter-
Friosur S.A. - Headquarters
Cargill, Incorporated - Global Headquarters
Benihana Inc.
Leardini Pescados Ltda
Mitsubishi Corporation Marine Products Depts. D.Team
CJ Corporation  -Holding Headquarter-
Greenpeace International - The Netherlands
David Suzuki Foundation
Fisheries and Oceans Canada -Communications Branch-
Mitsui & Co.,Ltd - Headquarters
Ocean Trawlers Group - Ocean Trawlers HK Ltd.
Natori Co., Ltd.
Carrefour Supermarket - Headquarters
FedEx Corporation -Headquarter-
AKBM - Aker BioMarine ASA
Seafood Choices Alliance -Headquarter-
Austevoll Seafood ASA
Walmart / Wal-Mart Stores, Inc. (Supermarket) -Headquarter-
New Japan Radio Co.Ltd (JRC) -Head Office-
Gulfstream JSC
INVE Group - Head Office
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
Morpol ASA - Group Headquarters
National Geographic Society
AmazonFresh, LLC - AmazonFresh

Copyright 1995 - 2016 Fish Info & Services Co.Ltd| All Rights Reserved.   DISCLAIMER