Ocean Acidification Putting Coastal Jobs at Risk

Press Release
Monday, September 24, 2012
Inshore Fishing Boats: Photo credit Likedeel CCL

A NOAA study finds that ocean acidification is accelerated in nutrient-rich areas putting marine resources, coastal economies, at risk.

Carbon dioxide released from decaying algal blooms, combined with ongoing increases in atmospheric carbon emissions, leads to increased levels of ocean acidification, and places additional stress on marine resources and the coastal economies that depend on them, according to a new study published by NOAA.

Ocean acidification occurs when the ocean absorbs carbon dioxide from the atmosphere or from the breakdown of organic matter, which then causes a chemical reaction to make it more acidic. Species as diverse as scallops and corals are vulnerable to ocean acidification, which can affect the growth of their shells and skeletons.

Research by NOAA's William G. Sunda and Wei-jun Cai of the University of Georgia points to the process of eutrophication - the production of excess algae from increased nutrients, such as, nitrogen and phosphorus -- as a large, often overlooked source of CO2 in coastal waters. When combined with increasing CO2 in the atmosphere, the release of CO2 from decaying organic matter is accelerating the acidification of coastal seawater.

The effects of ocean acidification on the nation's seafood industry are seen in the Pacific Northwest oyster fishery. According to NOAA, ocean acidification is affecting oyster shell growth and reproduction, putting this multi-million dollar industry at risk. Annually, the Pacific Northwest oyster fishery contributes $84 million to $111 million to the West Coast's economy. According to an earlier NOAA study ocean acidification could put more than 3,000 jobs in the region at risk.

Sunda and Cai used a new chemical model to predict the increase in acidity of coastal waters over a range of salinities, temperatures and atmospheric CO2 concentrations. They found that the combined interactive effects on acidity from increasing CO2 in the atmosphere and CO2 released from the breakdown of organic matter were quite complex, and varied with water temperature, salinity and with atmospheric CO2.

"These interactions have important biological implications in a warming world with increasing atmospheric CO2," said Sunda. "The combined effects of the two acidification processes, along with increased nutrient loading of nearshore waters, are reducing the time available to coastal managers to adopt approaches to avoid or minimize harmful impacts to critical ecosystem services such as fisheries and tourism."

Sunda and Cai found that, given current atmospheric CO2 concentrations and projected CO2 released from organic matter decay, seawater acidity could nearly double in waters with higher salinity and temperature, and could rise as much as 12 times current levels in waters with lower salinity and lower temperature.

These model predictions were verified with measured acidity data from the northern Gulf of Mexico and the Baltic Sea, two eutrophic coastal systems with large temperature and salinity differences, which experience large-scale algal blooms. The observed and modeled increases in acidity from eutrophication and algal decay are well within the range that can harm marine organisms.
 



 

Maritime Today


The Maritime Industry's original and most viewed E-News Service

Maritime Reporter June 2016 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

People & Company News

HCI Capital Renamed Ernst Russ AG

A vote was passed at the ordinary shareholders’ meeting of HCI Capital AG yesterday to change the company’s name to Ernst Russ AG. The Executive Board and Supervisory

CMA CGM to use Kingston As Transshipment Hub

French shipping giant CMA CGM plans to use Kingston Container Terminal,  Jamaica as a strategic Caribbean transshipment hub for an enlarged Panama Canal. The Port connects to US East Coast,

Conrad Shipyard Forms LNG Business Unit

Conrad Shipyard has formed a new business unit focused on LNG projects.   Conrad, builder of North America’s first LNG bunker barge scheduled for 2017 delivery,

Environmental

MISC Publishes its 2015 Sustainability Report

MISC Berhad (MISC) today announces the publication of its 2015 Sustainability Report, covering the Company’s commitment, strategy and performance for the year ended

Admiral of the Ocean Sea Award Recipients Named

The United Seamen's Service (USS) 2016 Admiral of the Ocean Sea Awards (AOTOS) will be presented to Arthur E. Imperatore, Founder and President of New York Waterways; Donald Marcus,

Orca Energy ESS to Power Fish Farm Support Vessel

Grovfjord Mek. Verksted AS (GMV) has selected Corvus Energy as the supplier of the lithium ion based energy storage system (ESS) for a fish farm support vessel called GMV ZERO.

Marine Science

UK First to Accept Marine Geoengineering Amendments

The United Kingdom has become the first State to formally accept the 2013 marine geoengineering amendments to the 1996 “London Protocol”, the treaty covering dumping of wastes at sea.

Seven Indonesian Sailors Kidnapped in Philippines

Seven Indonesian sailors have been taken hostage in the Sulu Sea in the southern Philippines, Indonesia's foreign minister said on Friday, the latest in a string

Admiral of the Ocean Sea Award Recipients Named

The United Seamen's Service (USS) 2016 Admiral of the Ocean Sea Awards (AOTOS) will be presented to Arthur E. Imperatore, Founder and President of New York Waterways; Donald Marcus,

 
 
Maritime Contracts Maritime Standards Naval Architecture Navigation Offshore Oil Pipelines Pod Propulsion Port Authority Ship Simulators Sonar
rss | archive | history | articles | privacy | contributors | top maritime news | about us | copyright | maritime magazines
maritime security news | shipbuilding news | maritime industry | shipping news | maritime reporting | workboats news | ship design | maritime business

Time taken: 0.1100 sec (9 req/sec)