Navigation Links
Could oysters be used to clean up Chesapeake Bay?
Date:1/21/2011

Madison, WI JANUARY 20, 2011 -- Chronic water quality problems caused by agricultural and urban runoff, municipal wastewater, and atmospheric deposition from the burning of fossil fuels leads to oxygen depletion, loss of biodiversity, and harmful algal blooms. This nutrient pollution is prevalent in many coastal marine and estuarine ecosystems worldwide. Chesapeake Bay is the largest estuary in North America and although many efforts have been taken to improve its water quality, nutrient pollution still keeps it at unacceptable levels.

In a study funded by the U.S. Environmental Protection Administration and administered by the National Fish and Wildlife Foundation, biologists at Virginia Commonwealth University measured the nutrient removal capacity of the Eastern oyster, Crassostrea virginica.

Researchers found that an additional 2.5 cm of growth allowed a farmed oyster to remove 2.2 times the nutrients of a regular oyster. In fact, a large scale oyster farm harvesting 1 million of these 76 mm oysters can remove 132 kg of nitrogen, 19 kg of phosphorus, and 3,823 kg of carbon. The full study is available in the January/February 2011 issue of the Journal of Environmental Quality.

Oysters were a novel yet obvious choice to enhance the ecosystem's water quality. They process nutrients while feeding on phytoplankton and then store the nutrients in their shells and tissue through a process known as bioassimilation. Although Chesapeake Bay is a natural habitat for the Eastern oyster, 99% of the native population has been lost. This prompted researchers to explore the use of commercial oyster farms.

Oysters were raised at two commercial-scale aquaculture sites in Chesapeake Bay as well as a site in Maryland and one in Virginia to represent two typical cultivation environments in the Bay. The nutrient contents of the tissues and shells of oysters of various sizes were measured.

According to Colleen Higgins of Virginia Commonwealth University, "Based on these results, it would take eight large-scale oyster farms harvesting one million (of these) 76 mm oysters per year to remove one ton of nitrogen from the Bay, providing managers with the ability to determine the practical implication of such an ecosystem service."


'/>"/>

Contact: Sara Uttech
suttech@sciencesocieties.org
608-268-4948
American Society of Agronomy
Source:Eurekalert

Related biology news :

1. Vitiligo skin disorder could yield clues in fight against melanoma
2. Saliva proteins could help detection of oral cancer
3. Research about plant viruses could lead to new ways to improve crop yields
4. Nanodiamond drug device could transform cancer treatment
5. UNC study on properties of carbon nanotubes, water could have wide-ranging implications
6. So-called sandfish could help materials handling and process technology specialists
7. Discovery of natural compounds that could slow blood vessel growth
8. Researchers design artificial cells that could power medical implants
9. Herbicide-resistant grape could revitalize Midwest wine industry
10. Sensitive laser instrument could aid search for life on Mars
11. Could Dr. House be replaced by a computer?
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/17/2017)... April 17, 2017 NXT-ID, Inc. (NASDAQ: ... the filing of its 2016 Annual Report on Form 10-K on ... ... is available in the Investor Relations section of the Company,s website ... SEC,s website at http://www.sec.gov . 2016 Year Highlights: ...
(Date:4/11/2017)... , April 11, 2017 No two ... researchers at the New York University Tandon School ... Engineering have found that partial similarities between prints ... used in mobile phones and other electronic devices ... The vulnerability lies in the fact that ...
(Date:4/5/2017)... , April 4, 2017 KEY FINDINGS ... to expand at a CAGR of 25.76% during the ... is the primary factor for the growth of the ... https://www.reportbuyer.com/product/4807905/ MARKET INSIGHTS The global stem ... technology, application, and geography. The stem cell market of ...
Breaking Biology News(10 mins):
(Date:8/21/2017)... ... August 21, 2017 , ... The ... this two-part educational webinar, in which attendees will learn about the assembly and ... composition. Along with an overview of the development and validation of new high-quality ...
(Date:8/18/2017)... ... August 18, 2017 , ... Producers of ... Federal Hybrids, Inc. in an upcoming episode, scheduled to broadcast fourth quarter 2017. ... explore Federal Hybrids, the independent, family-owned seed company. Educating audiences about its broad ...
(Date:8/17/2017)... Springs, FL (PRWEB) , ... August 17, 2017 ... ... announced that the stock market news outlet had provided a research update on ... company's nasally administered TRT product. , According to Soulstring, prescription rates for Natesto® ...
(Date:8/16/2017)... ... August 16, 2017 , ... Tunnell Consulting announced today that four ... ISPE Annual Meeting and Expo , to be held October 29 through November 1 ... “Driving innovation to advance patient therapies.” , The ISPE Annual Meeting and Expo will ...
Breaking Biology Technology: