Navigation Links
Scientists show that streams are critical to preservation of oceanic coastal zones
Date:3/12/2008

The plight of the worlds oceans is dire, according to recent studies, through insults from human-derived activities depopulating and damaging reefs, altering coastlines, and creating pollutants, such as nitrogen runoff from terrestrial watersheds.

A study by 31 aquatic biologists involving 72 stream sites in the United States and Puerto Rico has found that one critical buffer to excess nitrogen run off from agricultural and urban areas turns out to be small streams and rivers. The findings are published March 12 in the journal Nature.

We found that nitrate was filtered from stream water by tiny organisms such as algae, fungi and bacteria, says Patrick Mulholland, lead author of the study and a member of Oak Ridge National Laboratorys Environmental Sciences Division, with a joint appointment at the University of Tennessee. Further, our model showed that the entire stream network is important in removing pollution from stream water.

The study used a rare nitrogen isotope to examine the effects of nitrogen loading in streams. The researchers analyzed its removal relative to the amount of nitrogen present in the stream overall. The results showed that much of the nitrogen was removed by bacteria, in a process called denitrification that releases harmless nitrogen gas to the atmosphere. However, the study also demonstrated that as nitrate loads increase, the efficiency of removal was reduced.

Our study shows that nitrogen loading compromises the ability of streams to retain or transform nitrate, a major pollutant that has been associated with lake and stream eutrophication, groundwater pollution, and coastal dead zones, says Nancy Grimm, an ecologist at Arizona State University who has been involved with the project since the 1980s.

Presently its believed that small streams and rivers remove three-quarters of the excess nitrogen contamination before it reaches the oceans by acting as sinks. However, the researchers f
'/>"/>

Contact: Margaret Coulombe
margaret.coulombe@asu.edu
480-727-8934
Arizona State University
Source:Eurekalert

Page: 1 2

Related biology news :

1. Scientists to discover why flamingos are in the pink of health -- in the poo!
2. Scientists believe photograph depicts wolverine in California
3. Scientists successfully treat new mouse model of inflammatory bowel disease
4. Genes hold the key to how happy we are, scientists say
5. Scientists uncover a novel mechanism that regulates carbon dioxide fixation in plants
6. Bright lights: Mystery of glowing antibody solved by Scripps research scientists
7. Scientists discover how cigarette smoke causes cancer: Study points to new treatments, safer tobacco
8. Exeter scientists pour cold water on EU bird policy
9. Yale scientists create artificial cells that boost the immune response to cancer
10. Scientists unravel the genetic coding of the pea
11. Scientists discover giant fossil frog from hell
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/24/2014)... electric cars ply silent freeways, solar panels blanket rooftops ... earth, from howling winds and from the blazing desert ... is technically and economically feasible to convert California,s all-purpose ... Published in Energy , the plan shows the ... in California that could create tens of thousands of ...
(Date:7/24/2014)... brewery has its own microbial terroir, meaning the microbial ... found in the product, creating the final flavor according ... Applied and Environmental Microbiology . This is the ... a sake brewery. , Many sake makers inoculate ... A. Mills of the University of California, Davis, but ...
(Date:7/24/2014)... low vision specialist at The University of Texas Health ... awarded a grant to help Harris County residents whose ... surgery. , Even with corrective lenses, many people with ... are a variety of low vision devices, such as ... vision loss. , Iyer is using the three-year, $164,645 ...
Breaking Biology News(10 mins):Stanford study shows how to power California with wind, water and sun 2Stanford study shows how to power California with wind, water and sun 3Stanford study shows how to power California with wind, water and sun 4The microbes make the sake brewery 2UTHealth Dr. Bhavani Iyer awarded low vision grant 2
... turned off or left on in healthy ... common cancers and maybe help avoid them, Medical College ... alterations, called DNA methylation, in the body,s basic building ... and their cancerous counterpart to find telltale patterns that ...
... A new study finds that most older long-term cancer survivors ... health habits. The study also reveals that those survivors ... health and quality of life. Published in the September 1, ... the American Cancer Society, the research indicates that greater efforts ...
... The results of a national assessment of indoor location ... announced at Worcester Polytechnic Institute (WPI) during the 2009 ... Emergency Responders, which runs from Aug. 3 to 4. ... with funding from the Department of Homeland Security and ...
Cached Biology News:Cancer's distinctive pattern of gene expression could aid early screening and prevention 2Cancer's distinctive pattern of gene expression could aid early screening and prevention 3Cancer's distinctive pattern of gene expression could aid early screening and prevention 4Most older long-term cancer survivors have poor health habits 2Results of national assessment of first responder location systems to be announced Aug. 3 2Results of national assessment of first responder location systems to be announced Aug. 3 3Results of national assessment of first responder location systems to be announced Aug. 3 4
(Date:7/24/2014)... (PRWEB) July 24, 2014 2014 ... Sulphate Industry” is a professional and in-depth research ... introduces Potassium Sulphate basic information, including its ... industry overview. This research covers the international market ... global industry analysis covering macroeconomic environment & economic ...
(Date:7/24/2014)... 24, 2014 1000 balances – 4 ... on customers’ weighing needs and expertly narrows down the ... balances, scales or even terminals. , First, select ... weight (or select readability instead) and define the accuracy ... selection criteria narrows down the list to models that ...
(Date:7/24/2014)... -- Spherix Incorporated (SPEX) -- an intellectual property development company ... today announced that the Company will issue a business ... Monday, August 18, 2014 for shareholders. Management has scheduled ... August 18, 2014 to discuss the company,s progress to ... Anthony Hayes . Following prepared remarks, management ...
(Date:7/24/2014)... July 24, 2014 The patent ... molecular diagnostic test results. It also enables true ... the validation and reporting of high profile assays ... is a rapidly growing area of biotechnology that ... predisposition, cancer, and companion diagnostics in personalized medicine. ...
Breaking Biology Technology:Potassium Sulphate Market & SHMP Industry 2014 (Global, China) Analysis Now Available at DeepResearchReports.com 2Potassium Sulphate Market & SHMP Industry 2014 (Global, China) Analysis Now Available at DeepResearchReports.com 3Potassium Sulphate Market & SHMP Industry 2014 (Global, China) Analysis Now Available at DeepResearchReports.com 4Spherix Schedules Shareholder Update Call 2New DNA-barcode Patent Virtually Eliminates False Test Results and Sample Mix-up 2
...  Today, the Global Probiotics Council (GPC), a committee formed ... launch of the fifth annual Young Investigator Grant for ... in the amount of $50,000, to promising young researchers. ... the role of probiotics and gastrointestinal microbiota in health ...
... Arcion Therapeutics, a clinical stage biotechnology company developing ... received notice of allowance for a US Patent for ... ARC-2022 is being developed by Arcion for pain associated ... has been evaluated in a single-dose Phase 1 pharmacokinetic ...
... Jan. 4, 2012  Verify Brand™ announces the release ... 4.0 software. VB Enterprise 4.0 is a suite ... client and mobile software applications that enable comprehensive ... Trace® across the supply chain. VB Enterprise ...
Cached Biology Technology:Fifth Cycle of Probiotics & Microbiota Research Grant Announced 2Fifth Cycle of Probiotics & Microbiota Research Grant Announced 3Fifth Cycle of Probiotics & Microbiota Research Grant Announced 4Arcion Receives Notice of Allowance for US Patent for Novel Topical Lidocaine Formulation for Pain 2Verify Brand™ Announces the Release of VB Enterprise 4.0 2
For removal of the zona pellucida. Sterile, Mouse Embryo tested...
... The LXQ linear ion trap mass spectrometer ... analytical laboratory., The LXQ linear ion trap ... and proteomic applications, delivering the fast cycle ... linear ion trap at an attractive price. ...
... scientists who do not have access to microarray ... their biological samples tested for the concentration of ... 1-2-3 Chose the analytes you wish ... S&S antibody menu. Send your samples to ...
... Persistent Analysis Environment 2) Dot plot, ... 3) Software Compensation 4) Cell Cycle ... Platform 7) Intelligent batch generation of graphs ... 9) Single drag-and-drop operations to perform complex ...
Biology Products: