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


Coccolithophores (Photo: NEON/Richard Bartz)

Algae hold clues to climate change

WORLDWIDE
Wednesday, February 06, 2013, 02:10 (GMT + 9)

Microscopic ocean algae called coccolithophores are providing clues about the impact of climate change both now and many millions of years ago. The study found that their response to environmental change varies between species, in terms of how quickly they grow.

Coccolithophores, a type of plankton, are not only widespread in the modern ocean but they are also prolific in the fossil record because their tiny calcium carbonate shells are preserved on the seafloor after death – the vast chalk cliffs of Dover, for example, are almost entirely made of fossilised coccolithophores.

The fate of coccolithophores under changing environmental conditions is of interest because of their important role in the marine ecosystem and carbon cycle. Because of their calcite shells, these organisms are potentially sensitive to ocean acidification, which occurs when rising atmospheric carbon dioxide (CO2) is absorbed by the ocean, increasing its acidity.

There are many different species of coccolithophore and in an article, published in Nature Geoscience this week, the scientists report that they responded in different ways to a rapid climate warming event that occurred 56 million years ago, the Palaeocene-Eocene Thermal Maximum (PETM).

The study, involving researchers from the University of Southampton, the National Oceanography Centre and University College London, found that the species Toweius pertusus continued to reproduce relatively quickly despite rapidly changing environmental conditions. This would have provided a competitive advantage and is perhaps why closely-related modern-day species considered to be its descendants, (such as Emiliana huxleyi) still thrive today.

In contrast, the species Coccolithus pelagicus grew more slowly during the period of greatest warmth and this inability to maintain high growth rates may explain why its descendants are less abundant and less widespread in the modern ocean.

"This work provides us with a whole new way of looking at living and fossil coccolithophores," said lead author Dr Samantha Gibbs, Senior Research Fellow at University of Southampton Ocean and Earth Science.

By comparing immaculately preserved and complete fossil cells with modern coccolithophore cells, the researchers could interpret how different species responded to the sudden increase in environmental change at the PETM, when atmospheric CO2 levels increased rapidly and the oceans became more acidic.

"We use knowledge of how coccolithophores build their calcite skeletons in the modern ocean to interpret how climate change 56 million years ago affected the growth of these microscopic plankton," said co-author Dr Alex Poulton, a Research Fellow at the National Oceanography Centre.

"This is a significant step forward and allows us to view fossils as cells rather than dead 'rocks'. Through this we can begin to understand the environmental controls on oceanic calcification, as well as the potential effects of climate change and ocean acidification."

[email protected]
www.fis.com


 Print


Click to know how to advertise in FIS
MORE NEWS
Argentina
Oct 20, 00:10 (GMT + 9):
The Oceanographic and Fisheries Research Vessel 'Mar Argentino' joins the INIDEP fleet
Norway
Oct 20, 00:00 (GMT + 9):
Other Media | SeafoodSource: Fish welfare must take higher priority, Salmon Group says
South Korea
Oct 19, 20:00 (GMT + 9):
Frozen cod collars, imports 57% from Russia
Norway
Oct 19, 17:00 (GMT + 9):
IN BRIEF - Increased minimum prices for NVG herring for consumption from today
Argentina
Oct 19, 16:00 (GMT + 9):
A Marine Protected Area in Malvinas-Falkland, South Georgia and South Sandwich
Russian Federation
Oct 19, 06:00 (GMT + 9):
Statistics | Production Volume | Pollock │ Far east │ 2011-20
United Kingdom
Oct 19, 05:00 (GMT + 9):
Catches, quotas and communities: the key fisheries issues at stake
Norway
Oct 19, 02:00 (GMT + 9):
Can we use lumpfish against scabies sea lices?
France
Oct 19, 00:50 (GMT + 9):
Otros Medios | EuropaAzul: Los pescadores franceses podrían pagar por acceder a aguas británicas
China
Oct 19, 00:40 (GMT + 9):
Other Media | iPac.acuicultura: FAO moves towards the Millennium + 20 World Conference on Aquaculture (GCA) with online meetings
China
Oct 19, 00:30 (GMT + 9):
Other Media | SalmonBusiness: China says that it has detected and isolated living coronavirus on frozen fish packaging for first time
Germany
Oct 19, 00:20 (GMT + 9):
Other Media | The Fish Site: Meet Germany's pioneering shrimp producer
United Kingdom
Oct 19, 00:10 (GMT + 9):
Other Media | Fish Farmer: Super Spreader
China
Oct 19, 00:10 (GMT + 9):
Statistics │ Import and Export │ Surimi and processed fish meat products
Norway
Oct 19, 00:00 (GMT + 9):
Other Media | FiskerForum: Norway and Russia agree 2021 quotas



Lenguaje
FEATURED EVENTS
  
TOP STORIES
Future of Fish launches the Seafood Voting Challenge
United States Future of Fish, an international non-profit dedicated to supporting resilience in coastal communities and ocean based economies, launched the Seafood Voting Challenge to mobilize its own community &md...
Have you ever noticed the age of the fish you are eating?
Japan "How old is this fish?" Have you ever thought about it when you saw it at a supermarket? In everyday life, you rarely know the age of a fish. Regarding the lifespan of creatures living ...
Press release | SAGE imagines a gender inclusive seafood industry
United States Portland, OR. -- Did you know that 50% of people in the seafood industry are women? Most are found in low-paying, yet essential, positions and are significantly underrepresented in management and deci...
On the shrimp season, the vision of Juan Pablo Basavilbaso from Iberconsa
Argentina Extending two weeks beyond the limit recommended by INIDEP, it comes to an end with few boats in activity and meager yields. A year full of complications, in which the freezer sector was the hardest h...
 
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. - Group Headquarters
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 - 2020 Fish Info & Services Co.Ltd| All Rights Reserved.   DISCLAIMER