Archive for December, 2010

EPOCA NY presents its first-ever new years eve with a bang!

It is great to know that EPOCA is well-known not only as the European Project on Ocean Acidification but also as a fashion company and manufacturer of plastic packagings. Now add to the list a fine NYC restaurant as demonstrated in the post below!

Have a great year 2011!

Jean-Pierre Gattuso
EPOCA Scientific Coordinator

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Epoca NY, one of the newest and finest restaurant successes in New York City, is proud to launch its very first New Years Eve 2011. We do it this year with an award-winning menu and amazing party.
Continue reading ‘EPOCA NY presents its first-ever new years eve with a bang!’

Ocean acidification: global warming’s evil twin

Seminar, Bevan Series on Sustainable Fisheries.

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The future of coral reefs: climate change, acidification, over-fishing and other stresses (meeting)

The following is an announcement for a conference on climate change and other stressors acting upon reefs that will be held at the 22nd Pacific Science Congress in Kuala Lumpur, Malaysia, 14-18 June, 2011

Subtheme: Oceans (Coral Reefs, Ocean Acidification, Fisheries)

Title: “The Future of Coral Reefs: Climate Change, Acidification, Over-fishing and other Stresses”

Conveners: Dr. Terry J. Donaldson and the Pacific Science Association Coral Reef WorkingGroup

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Top stories of the year: #3 – ocean acidification

#3. EPA policy for addressing ocean acidification through the Clean Water Act

Carbon dioxide emissions don’t just build up in the atmosphere; nearly a third of atmospheric carbon dioxide gets absorbed by the ocean. As carbon dioxide dissolves in water, it produces carbonic acid. On a grand enough scale, this process can shift the pH balance of the ocean. Indeed, as a whole, the ocean is approximately 30% more acidic than it was two hundred years ago. This phenomenon is called ocean acidification. It is a problem which has the potential to decimate organisms with calcium-based shells (corals, oysters) and rearrange oceanic food webs. But, until recently (say, the past five years), the problem went largely unrecognized; even ocean scientists did not fully grasp our ability to alter the fundamental chemistry of the vast ocean.

Continue reading ‘Top stories of the year: #3 – ocean acidification’

Ocean acidification (Video)

Ocean acidification happens because on land we release carbon dioxide into the atmosphere.

That carbon dioxide comes back into the ocean. You have increased CO2 in the water and the water simply becomes more corrosive. It permeates through the food chain all the way up to the upper levels.

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Carbon dioxide is threatening our fisheries

Since the industrial revolution began over two centuries ago, the oceans have absorbed an estimated 500 billion tons of carbon dioxide. This is about a quarter of the total amount spewed into the atmosphere as the burning of coal, oil and natural gas gathered pace and agriculture replaced forests.

As a result, the basic chemistry of seawater is being altered on a scale scientists say has not occurred for at least 20 million years. Moreover, it is happening at a rate not seen in the last 65 million years.

Does it really matter? More specifically, will it affect future food security in a world where 1 billion people already rely on fisheries for their primary source of animal protein and another three billion depend on the sea to meet at least 15 percent of their protein needs?

This is a pressing question for Japan where fish has long played an important part in the national diet.

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Intestinal anion exchange in marine teleosts is involved in osmoregulation and contributes to the oceanic inorganic carbon cycle

Marine teleost fish osmoregulation involves seawater ingestion and intestinal fluid absorption. Solute coupled fluid absorption by the marine teleost fish intestine has long been believed to be the product of Na+ and Cl- absorption via the Na+:K+:2Cl- co-transporter (NKCC2). However, the past decade has revealed that intestinal anion exchange contributes significantly to Cl- absorption, in exchange for HCO3- secretion, and that this process is important for intestinal water absorption. In addition to contributing to solute coupled water absorption intestinal anion exchange results in luminal precipitation of CaCO3 which acts to reduce luminal osmotic pressure and thus assist water absorption. Most recently, activity of apical H+-pumps, especially in distal segments of the intestine have been suggested to not only promote anion exchange, but also to reduce luminal osmotic pressure by preventing excess HCO3- concentrations from accumulating in intestinal fluids, thereby aiding water absorption. The present review summarizes and synthesizes the most recent advances in our view of marine teleosts osmoregulation, including our emerging understanding of epithelial transport of acid-base equivalents in the intestine, the consequences for whole organism acid-base balance and finally the impact of piscine CaCO3 formation on the global oceanic carbon cycle.

Continue reading ‘Intestinal anion exchange in marine teleosts is involved in osmoregulation and contributes to the oceanic inorganic carbon cycle’

Scientists warn ocean acidification destroying Caribbean coral (Video)

Continue reading ‘Scientists warn ocean acidification destroying Caribbean coral (Video)’

“Understanding Ocean Acidification” Workshop

“Understanding Ocean Acidification” Workshop, University of California at Santa Barbara.

High anthropogenic carbon content in the eastern Mediterranean

This work presents data of dichlorodifluoromethane (CFC‐12), dissolved inorganic carbon and total alkalinity from a cruise to the Mediterranean Sea during October– November 2001, with the main focus on the CFC‐12 data and on the eastern basin. Using the transit time distribution method, the anthropogenic carbon concentrations in the basin were estimated. Results were cross‐checked with a back‐calculation technique. The entire water column of the Mediterranean Sea contains anthropogenic CO2, with minimum concentrations of 20.5 mmol kg−1 (error range: 16.9–27.1 mmol kg−1) in the most eastern part of the basin at intermediate depths, where the waters’ mean age is >130 yr. Column inventories of up to 154 mol m−2 (132–179 mol m−2) are found and a total inventory of 1.7 Pg (1.3–2.1 Pg) of anthropogenic carbon in the Mediterranean Sea was estimated. There is a net flux of 38 Tg yr−1 (30–47 Tg yr−1) of dissolved inorganic carbon through the Strait of Gibraltar into the Atlantic Ocean and an opposite net flux of 3.5 Tg yr−1 (−1.8–9.2 Tg yr−1) of anthropogenic carbon into the Mediterranean Sea.

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Ocean acidification in the IPCC AR5 WG II

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