Navigation Links
Increasing nitrogen pollution overwhelms filtering capability of streams
Date:3/12/2008

MBL, WOODS HOLE, MAIncreasing nitrogen runoff from urban and agriculture land-use is interfering with our streams and rivers natural processes for reducing this pollutant before it endangers delicate downstream ecosystems, reports a nationwide team of 31 ecologists, including two from the MBL (Marine Biological Laboratory) Ecosystems Center.

The findings, published in the March 13 issue of Nature, are based on a major study of 72 streams in 8 regions across the U.S. and Puerto Rico. It was a collaborative effort by many leading aquatic ecologists working to solve a complex problem regarding the role of streams in reducing pollution, says lead author Patrick Mulholland of the Oak Ridge National Laboratory and University of Tennessee.

Just how important are streams" They are effective filters that can help prevent nitrate pollution from reaching lakes and coastal oceans, where it can cause noxious algal blooms and lead to oxygen depletion and death of fish and shellfish, as has been recently reported in the Gulf of Mexico, says Mulholland.

Building on an earlier study (Science, April 6, 2001) that demonstrated that even the smallest streams can filter up to half of the inorganic nitrogen that enters them, the scientists launched the new study to learn how increased nitrogen pollution is affecting this process. They analyzed data collected from a variety of waterways, including streams in urban and agricultural settings, where land-use dominates the landscape and degrades water quality.

Our findings demonstrate that streams containing excess nitrogen are less able to provide the natural nitrogen removal service known as denitrification, says Bruce Peterson, a senior scientist at the MBL Ecosystems Center and one of the studys authors. In denitrification, bacteria help convert nitrate in the water to nitrogen gases that then escape to the atmosphere.

The new research demonstrates that although denitrification rates
'/>"/>

Contact: Gina Hebert
ghebert@mbl.edu
508-289-7725
Marine Biological Laboratory
Source:Eurekalert

Page: 1 2

Related biology news :

1. Toxic releases down from North American industry leaders, increasing from other facilities
2. Mountain summits in the Alps becoming increasingly similar
3. Nitrogen -- the silent species eliminator
4. Study reveals that nitrogen fertilizers deplete soil organic carbon
5. When accounting for the global nitrogen budget, dont forget fish
6. Bad news for coastal ocean: less fish out, means more nitrogen in
7. Nitrogen pollution boosts plant growth in tropics by 20 percent
8. Evolution of root nodule symbiosis with nitrogen-fixing bacteria
9. A common genetic mechanism discovered in nitrogen-fixing plants
10. Healthy rivers needed to remove nitrogen
11. ORNL study finds rivers play part in removing nitrogen
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/31/2015)... , March 31, 2015  Elephant Talk Communications Corp. ... global provider of Software Defined Network Architecture (ET Software ... total revenue of approximately $20.4 million for the year ... $19.5 million for the year ended December 31, 2013. ... the Company had completed its multi-year transition away from ...
(Date:3/30/2015)... 26, 2015 Research and Markets ( ... "Global Gesture Recognition Market in Automotive Sector 2014-2018" ... the Global Gesture Recognition market in Automotive Sector to ... 2013-2018. Gesture recognition is the ability of ... of an individual. Gesture recognition technology can be 2D-based ...
(Date:3/24/2015)... DUBLIN , Mar. 24, 2015 Research and ... addition of the "Global Iris Recognition Market 2015-2019" ... forecast the Global Iris Recognition market to grow at ... This report covers the present scenario and ... for the period 2015-2019. To calculate the market size, ...
Breaking Biology News(10 mins):Elephant Talk Reports 2014 Fourth Quarter and Year End Financial Results 2Elephant Talk Reports 2014 Fourth Quarter and Year End Financial Results 3Elephant Talk Reports 2014 Fourth Quarter and Year End Financial Results 4Elephant Talk Reports 2014 Fourth Quarter and Year End Financial Results 5Elephant Talk Reports 2014 Fourth Quarter and Year End Financial Results 6Global Gesture Recognition Market in Automotive Sector Report 2015 - Growing Number of Partnerships 2Global Iris Recognition Market 2015-2019 with 3M Cogent, Bioenable Technologies, Cross Match Technology, Iris ID Systems & Safran Dominating 2
... phosphatidylserine is a natural food supplement produced from beef, ... memory loss, it,s a popular treatment for older people ... Gil Ast and Dr. Ron Bochner of Tel Aviv ... discovered that the same supplement improves the functioning of ...
... Where? Copenhagen, Denmark: Bella Center Congress ... Why? An annual meeting focusing on ... installation, drawing on leading experiences from all over the world ... more than 900 abstracts received from more than 60 countries, ...
... University of Minnesota Medical School researchers from the Masonic ... University,s Brain Tumor Program, have developed a new mouse ... allow them to discover new genes and gene pathways ... published this week in the journal Nature Genetics ...
Cached Biology News:Common food supplement fights degenerative brain disorders 221st European Biomass Conference and Exhibition 221st European Biomass Conference and Exhibition 321st European Biomass Conference and Exhibition 4U of M researchers develop model for better testing, targeting of MPNST 2
(Date:4/20/2015)... Calif. , April 20, 2015   Meditope ... products using its proprietary technology, today announced presentation of ... for the development of antibody-drug conjugates (ADCs). The data were ... 2015, taking place April 18-22 in Philadelphia ... about these data which point to the many commercial ...
(Date:4/17/2015)... , April 17, 2015  Centrillion ... a SBIR grant from the National Human ... Institutes of Health (NIH). The grant will ... in the development of breakthrough genomic technologies, ... specially fabricated substrates. Centrillion has been developing ...
(Date:4/17/2015)... , April 17, 2015  Guggenheim Securities, the investment ... announced the hiring of William Tanner as ... Mr. Tanner will start work at Guggenheim in ... office. "Bill brings a wealth ... to our experienced and highly acclaimed healthcare team," said ...
(Date:4/17/2015)... BellBrook Labs announced today that ... the powerful Orthogonal Pooled Screening (OPS) Platform developed ... the Lankenau Institute for Medical Research (LCGC) in ... improve successful drug discovery outcomes using far more ... libraries available nowhere else, coupled to a state-of-the-art ...
Breaking Biology Technology:Meditope Biosciences Presents Data At The American Association Of Cancer Research (AACR) Annual Meeting Validating Its SnAP Technology Platform 2Guggenheim Securities Hires Biotech Analyst William Tanner in Expansion of Healthcare Coverage 2BellBrook Labs and Lankenau Institute Partner to Accelerate Drug Discovery using Orthogonal Pooled Screening 2
... developed a method for stacking synthetic DNA and carbon ... lead to more accurate measurements for research related to ... electrodes coated with enzymes that react with compounds and ... the inefficiency of those sensors leads to imperfect measurements. ...
... Alice Jacobs, CEO of IntelligentMDx (IMDx), was named Best Entrepreneur ... the eighth annual Stevie ® Awards for Women in ... Business honor women executives, entrepreneurs, and the companies they run ... programs, which have been hailed as the world,s premier business ...
... Ganey Associates, Inc. has announced its elite class of ... first-ever Summit and Top Improver awards for clinical achievement ... Centers. Press Ganey, the health care ... than 10,000 health care organizations worldwide to create and ...
Cached Biology Technology:New biosensor benefits from melding of carbon nanotubes, DNA 2Dr. Alice Jacobs, CEO of IntelligentMDx, Named Best Entrepreneur in Eighth Annual Stevie® Awards for Women in Business 2Dr. Alice Jacobs, CEO of IntelligentMDx, Named Best Entrepreneur in Eighth Annual Stevie® Awards for Women in Business 3Nation's Best Health Care Organizations for Patient Satisfaction, Core Measures Honored by Press Ganey 2Nation's Best Health Care Organizations for Patient Satisfaction, Core Measures Honored by Press Ganey 3
... Anti-Lipid Phosphate Phosphatase 2 ... buffered aqueous solution ... saline containing 0.08% sodium ... from the human LPP2 ...
Anti-CaM kinase II recognizes the enzymes a subunit (6) and reacts with tissue from all mammalian species tested, as well as with chicken and frog tissues....
... Anti-MAPKAPK-2, Phospho-Specific(Thr 222 ) ... mM NaCl, 10 mM sodium ... glycerol, pH 7.5. Recognizes the ... kinase 2 (MAPKAPK-2) protein phosphorylated ...
Ca2+ Channel Ca gamma 2 Purified Anti-Mouse, Anti-Rat, Anti-Human clone Polyclonal, Isotype Rabbit Ig, 50 µl Consult technical datasheet for details....
Biology Products: