Navigation Links
Oregon researchers study widespread areas of low oxygen off northwest coast
Date:2/15/2008

A team of scientists studying the California Current a slow-moving mass of cold water that travels south along the coast from British Columbia to Baja California are seeing increasing areas of water off Washington and Oregon with little or no oxygen, possibly resulting in the deaths of marine animals that cannot leave the low-oxygen areas.

Were now seeing low oxygen levels that are much more widespread and far more intense than what has been recorded in the past, according to William Peterson, one of the researchers and an oceanographer at the NOAA Fisheries Services science center in Newport, Ore.

The fish have simply moved out of these areas and are probably doing fine elsewhere, said Peterson. But animals that cant move to better waters like Dungeness crabs, sea urchins and starfish will perish.

Peterson added that during the summer of 2006, anoxia a complete lack of oxygen in the water was recorded off the central Oregon coast for the first time.

In a paper published today in Science magazine, the researchers say that data going back to the 1950s show little evidence of widespread low-oxygen levels along the narrow continental shelf before about 2000. Since then conditions have begun to change.

The team conducted a submersible-based survey in the summer of 2006 and discovered no fish living along the rocky reefs that are normally healthy habitat for varieties of commercially important rockfishes. This is in contrast to similar surveys completed from 2000 through 2004 which registered abundant fish populations. In shallow areas in particular, the team found almost complete absence of bottom-dwelling organisms and a rise in bacteria that flourish under conditions of little or no oxygen.

Although the causes of these low- and no-oxygen conditions are not fully understood, it is known that low-oxygen water is associated with coastal upwelling the process by which nutrient-rich waters are brought from deep water to the sea surface. There these nutrients fuel extraordinarily high production of tiny plants and animals off the coasts of the Pacific Northwest during summer.

Eventually, much of this plankton production dies and falls to the seafloor where it decomposes, reducing the waters oxygen content, and causing hypoxia (low oxygen) or even anoxia (no oxygen).


'/>"/>

Contact: Brian Gorman
brian.gorman@noaa.gov
206-526-6613
NOAA Headquarters
Source:Eurekalert

Related biology news :

1. University of Oregon researcher finds that on waters surface, nitric acid is not so tough
2. Marines land at UO, leave with plans to wear Oregon-made training suits
3. Researchers identify proteins involved in new neurodegenerative syndrome
4. Texas researchers and educators head for Antarctica
5. MGH researchers describe new way to identify, evolve novel enzymes
6. University of Pennsylvania researchers develop formula to gauge risk of disease clusters
7. U of MN researchers discover noninvasive diagnostic tool for brain diseases
8. U of Minnesota researchers discover noninvasive diagnostic tool for brain diseases
9. Researchers discover new strategies for antibiotic resistance
10. Researchers find new taste in fruit flies: carbonated water
11. Binghamton University researchers investigate evolving malaria resistance
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/13/2017)... PUNE, India , April 13, 2017 According ... Identity Proofing, Identity Authentication, Identity Analytics, Identity Administration, and Authorization), Service, Authentication ... by MarketsandMarkets™, the IAM Market is expected to grow from USD 14.30 ... Annual Growth Rate (CAGR) of 17.3%. ... ...
(Date:4/11/2017)... , April 11, 2017 NXT-ID, Inc. ... technology company, announces the appointment of independent Directors Mr. ... to its Board of Directors, furthering the company,s corporate governance ... Gino ... we look forward to their guidance and benefiting from their ...
(Date:4/5/2017)... 2017 KEY FINDINGS The global ... a CAGR of 25.76% during the forecast period of ... factor for the growth of the stem cell market. ... MARKET INSIGHTS The global stem cell market is ... geography. The stem cell market of the product is ...
Breaking Biology News(10 mins):
(Date:10/11/2017)... ... October 11, 2017 , ... ComplianceOnline’s Medical Device Summit is back ... 8th June 2018 in San Francisco, CA. The Summit brings together current and former ... CEOs, board directors and government officials from around the world to address key issues ...
(Date:10/11/2017)... ... October 11, 2017 , ... A ... pregnancy rates in frozen and fresh in vitro fertilization (IVF) transfer ... age to IVF success. , After comparing the results from the fresh and ...
(Date:10/10/2017)... California (PRWEB) , ... October 10, 2017 , ... Dr. ... speaking at his local San Diego Rotary Club. The event entitled ... Diego, CA and had 300+ attendees. Dr. Harman, DVM, MPVM was joined by ...
(Date:10/9/2017)... DIEGO , Oct. 9, 2017  BioTech ... biological mechanism by which its ProCell stem cell ... critical limb ischemia.  The Company, demonstrated that treatment ... amount of limbs saved as compared to standard ... the molecule HGF resulted in reduction of therapeutic ...
Breaking Biology Technology: