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


Ocean acidification. (Photo Credit: UK Ocean Acidification Research Programme Knowledge Exchange Office)

Acidic oceans will transform ecosystems

WORLDWIDE
Wednesday, July 10, 2013, 00:30 (GMT + 9)

Ocean acidification may create an impact similar to extinction on marine ecosystems, according to a study released today by the University of California, Davis.

The study, published online in the journal Proceedings of the National Academy of Sciences, found that ocean acidification can degrade not only individual species, as past studies have shown, but entire ecosystems. This results in a homogenized marine community, dominated by fewer plants and animals.

"The background, low-grade stress caused by ocean acidification can cause a whole shift in the ecosystem so that everything is dominated by the same plants, which tend to be turf algae," said lead author Kristy Kroeker, a postdoctoral researcher at the Bodega Marine Laboratory at UC Davis.

"In most ecosystems, there are lots of different colourful patches of plants and animals -- of algae, of sponges, of anemones," Kroeker said. "With ocean acidification, you lose that patchiness. We call it a loss of functional diversity; everything looks the same."

In the waters surrounding Castello Aragonese, a 14th century castle off the coast of Italy, volcanic vents naturally release bubbles of carbon dioxide gas, creating different levels of acidity among the marine-animal and plant communities there. These gradients of acidity gave the scientists a glimpse of what a future marked by increasingly acidic ocean waters could look like, and how the creatures and plants living in those environments may react to it.

The researchers selected three reef zones--of low, high and extremely high acidity, representing world ocean conditions for the present day, 2100 and 2500, respectively. Then they removed animals and vegetation from the rocks there. Every few months for three years, Kroeker dived to the study plots to photograph them and watch how the plots in each zone recovered.

By examining how recovery differed among zones, the study found that acidic water reduced the number and variety of species. In the non-acidic plots, many different plants and animals, including turf algae, would colonize and grow. Calcareous species, such as sea urchins and snails, would then eat them, allowing for variety through time.

However, in both the high and extremely high acidic plots, fleshy turf algae increased steadily and overtook the zones, as the urchins and other grazers were either not present or did not graze on the algae while in these zones.

Calcareous grazers play key roles in maintaining the balance within marine ecosystems. They are also considered among the most vulnerable species to ocean acidification.

"Our research is showing that if the role of these grazers changes with ocean acidification, you might expect to see cascading effects of the whole ecosystem," Kroeker said. "If the pattern holds for other calcareous grazers, this has implications for other ecosystems, as well."

editorial@fis.com
www.fis.com


 Print


Click to know how to advertise in FIS
MORE NEWS
Spain
Nov 26, 23:50 (GMT + 9):
Pescanova informs shareholders on its accounting mismatch
Australia
Nov 26, 23:30 (GMT + 9):
South Australian sardine fishermen get quota increase
Argentina
Nov 26, 23:00 (GMT + 9):
Fisheries-aquaculture cooperation issues with China agreed
Worldwide
Nov 26, 22:20 (GMT + 9):
BAP programme foresees further growth
Australia
Nov 26, 21:40 (GMT + 9):
IN BRIEF - Crab fishing in Cockburn Sound on hold until stocks recover
South Africa
Nov 26, 21:40 (GMT + 9):
IN BRIEF - Minister Molewa calls for public comments on the NEMBA, 2004 (Act No.10 of 2004) Draft Shark Biodiversity Management Plan
Australia
Nov 26, 21:40 (GMT + 9):
IN BRIEF - Catch increase for South Australian sardine fishers
Uganda
Nov 26, 21:40 (GMT + 9):
IN BRIEF - Fisheries Sector Gets FAO Boost
Australia
Nov 26, 21:40 (GMT + 9):
IN BRIEF - Wildcatch Fisheries SA chairman Woolford calls on Port Adelaide Enfield Council and State Government to collaborate on grand fish market
Brazil
Nov 26, 21:30 (GMT + 9):
IN BRIEF - Merck Animal Health Announces High Quality Tilapia Congress in Brazil - to be Held in São José do Rio Preto from November 25-27 2014
United States
Nov 26, 21:30 (GMT + 9):
IN BRIEF - Pacific hake mid-water trawl fishery earns MSC re-certification
United Arab Emirates
Nov 26, 20:20 (GMT + 9):
IN BRIEF - Middle East Aquaculture Forum (MEAF)
Singapore
Nov 26, 20:10 (GMT + 9):
IN BRIEF - THAIFEX-World of Food Asia Expands to 70,000 Square Metres
Canada
Nov 26, 03:40 (GMT + 9):
Lobster levy delayed until spring
South Korea
Nov 26, 03:20 (GMT + 9):
IN BRIEF - S. Korea moves to intensify penalty against illegal fishing



Lenguaje
FEATURED EVENTS
  
TOP STORIES
New shrimp species discovered in South African waters
South Africa Researchers from the University of Cape Town have identified a tiny shrimp specimen with banded, stalked eyes, and gaudy red 'warning' colouring in South African waters.
QR code created to enhance seafood traceability
Australia Non-for-profit entity driving sustainability in the local seafood industry OceanWatch Australia has devised a unique QR code for fresh seafood in an attempt to boost traceability.
Colombia, Peru and Chile agree to strengthen fisheries monitoring
Peru Peru, Colombia and Chile have agreed to strengthen their fishing supervision as part of a regional effort to combat illegal fishing and crimes affecting fisheries and aquaculture.
Haikui Seafood's profits fell due to 'challenging conditions'
Germany Seafood processing company Haikui Seafood registered a 12.8 per cent year on year decline in revenue in the 2014 January-September, which the firm considered was due to the keen competition and headwinds in the global economy.
 
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 (Head Office)
Inmarsat plc - Global Headquarters
Marks & Spencer
Tesco PLC (Supermarket) - Headquarters
Pescanova, S.A. - Group Headquarters
Sea Harvest Corporation (PTY) Ltd.
I&J - Irvin & Johnson Limited
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 ehf - 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-
Grupo Calvo - Luis Calvo Sanz, S.A. (Group 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
SeaChoice
National Geographic Society
AmazonFresh, LLC - AmazonFresh

Copyright 1995 - 2014 Fish Info & Services Co.Ltd| All Rights Reserved.   DISCLAIMER