Navigation Links
Streams natural filters, if not overloaded
Date:3/12/2008

>

The scientists found that the nitrate was taken up from stream water by algae and microorganisms. In addition, a fraction was permanently removed from streams by denitrification, a bacterial process that converts nitrate to nitrogen gas, which harmlessly joins an atmosphere already predominantly composed of nitrogen gas.

In the second phase of the study, the scientists developed a model that predicts nitrate removal as water flows through small streams and into larger streams and rivers. Our model showed that the entire stream network is important in removing pollution from stream water, said Patrick Mulholland, lead author of the study, a member of ORNLs Environmental Sciences Division, and a faculty member at the University of Tennessee. In addition, the effectiveness of streams to remove nitrate was greatest if the streams were not overloaded by pollutants such as fertilizers and wastes from human activities.

The largest removal occurred when nitrate entered small healthy streams and traveled throughout the network before reaching large rivers. The scientists concluded from their research that streams and rivers are effective filters that help reduce the amount of nitrate pollution exported from landscapes and thereby reduce eutrophication problems, Webster said.


'/>"/>

Contact: Susan Trulove
STrulove@vt.edu
540-231-5646
Virginia Tech
Source:Eurekalert  

Page: 1 2

Related biology news :

1. Greenhouse gas from English streams
2. New research offers prioritization plan for reducing nutrient pollution in feeder streams
3. Salamanders, headwater streams critical in food chain
4. Scientists show that streams are critical to preservation of oceanic coastal zones
5. Small streams mitigate human influence on coastal ecosystems
6. From the backyard to the ocean: New study shows streams act as key nitrogen filters
7. Streams remove significant amounts of nitrogen, preventing downstream dead zones
8. Natural chemical found in broccoli helps combat skin blistering disease
9. Natural insecticide re-created in the lab
10. Researchers develop simple method to create natural drug products
11. Brains timing linked with timescales of the natural visual world
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Streams natural filters, if not overloaded
(Date:7/10/2014)... , June 27, 2014  Pomerantz LLP has ... Inc. ("Provectus" or the "Company")(NYSE-MKT: PVCT) and certain ... United States District Court, Middle District of ... behalf of a class consisting of all persons ... securities between December 17, 2013 and May 22, ...
(Date:7/10/2014)... Conn. , July 2, 2014 NXT-ID, Inc., (OTCQB: ... reports that CEO Mr. Gino Pereira was interviewed ... show in Tampa Florida . Mr. Pereira ... host Cedric Harris and how the Wocket™ aims ... alternative.  Cedric Harris tells Gino ...
(Date:7/10/2014)... Fingerprint Cards, (FPC,s) new ... (DW). An Asian OEM has selected FPC1021 for a flagship ... August 2014.   FPC is proud to announce ... planned date for start of mass production in August 2014. ... 5M, for delivery in the first half of July. The ...
Breaking Biology News(10 mins):SHAREHOLDER ALERT: Pomerantz Law Firm Announces the Filing of a Class Action against Provectus Biopharmaceuticals, Inc. and Certain Officers - PVCT 2SHAREHOLDER ALERT: Pomerantz Law Firm Announces the Filing of a Class Action against Provectus Biopharmaceuticals, Inc. and Certain Officers - PVCT 3Security and Your Money: Tampa Bay Radio Host Cedric Harris Talks to NXT-ID CEO Mr. Gino Pereira about the Wocket Smart Wallet 2Security and Your Money: Tampa Bay Radio Host Cedric Harris Talks to NXT-ID CEO Mr. Gino Pereira about the Wocket Smart Wallet 3Security and Your Money: Tampa Bay Radio Host Cedric Harris Talks to NXT-ID CEO Mr. Gino Pereira about the Wocket Smart Wallet 4FPC Wins DW and Initial Ramp Order for FPC1021 Touch Sensor for Flagship Smartphone from Asian OEM 2
... a looming water crisis, driven by climate change, growing ... of this issue, the National Science Foundation has selected ... Engineering Research Center (ERC) to address this challenge by ... initial grant is $18.5 million spread over five years, ...
... Scientists at the U.S. Department of Energy,s (DOE) Brookhaven ... the metabolic processes in rapeseed plants - particularly those ... Their goal is to find ways to optimize the ... renewable resources for fuel and industrial chemicals. The ...
... ,(Phoenix ... awarded Robert Garfield, PhD, a researcher at St. Joseph,s Hospital and Medical ... to prevent post-partum hemorrhage. The grant was one of 88 awarded ... help lower the barriers for testing innovative ideas in global health. Phase ...
Cached Biology News:Re-inventing America's urban water infrastructure 2Re-inventing America's urban water infrastructure 3Re-inventing America's urban water infrastructure 4Modeling plant metabolism to optimize oil production 2Modeling plant metabolism to optimize oil production 3
(Date:7/10/2014)... July 10, 2014 Research and Markets ... the "International Photonic Integrated Circuit (Monolithic Integration, ... 2019" report to their offering. ... concept of photonic integration traces its roots in ... promise of photonic integration went unexplored and unfulfilled ...
(Date:7/10/2014)... April 15, 2014 -- According to the International ... nuclear security comes from terrorists acquiring sufficient quantities ... construct a crude nuclear explosive device. The IAEA ... trafficking have involved gram-level quantities, which can be ... According to a new study appearing this week ...
(Date:7/10/2014)... June 17, 2014 Using microscopic polymer light ... gases, researchers at MIT,s Quantum Photonics Laboratory have ... in the parts-per-billion range. Optical sensors are ideal ... high signal-to-noise ratio, compact, lightweight nature, and immunity ... sensors had been developed before, the MIT team ...
(Date:7/10/2014)... psychiatric disorders has been extremely challenging because there are ... insufficient to cause disease. Now investigators reporting in the ... Cell Stem Cell describe a strategy that may ... other risk factors or environmental exposures to affect the ... genetic variant that may predispose individuals to schizophrenia. ...
Breaking Biology Technology:International Photonic Integrated Circuit (Monolithic Integration, Hybrid Integration, Module Integration) Market - Forecasts to 2019 2Sensitive detection method may help impede illicit nuclear trafficking 2Swell new sensors 2New strategy could uncover genes at the root of psychiatric illnesses 2
... 11 Idenix Pharmaceuticals, Inc., (Nasdaq: IDIX ... results for the fourth quarter of 2008 on Tuesday, ... conjunction with the issuance of the press release, Idenix ... ET on Tuesday, February 17, 2009 to discuss the ...
... XTL,Biopharmaceuticals Ltd. (Nasdaq: XTLB ; TASE: ... Shweiger have been appointed to XTL,s Board of,Directors, effective ... assuming,the role of Co-Chief Executive Officer, with no remuneration, ... Ron Bentsur, Co-Chief Executive Officer ...
... Victhom Human Bionics Inc., "Victhom" (TSX: VHB), announced today ... and treatment of a physiological disorder that most likely ... seizure. , Victhom has recently filed a patent application ... sudden unexpected death in epilepsy (SUDEP) using its neuromodulation ...
Cached Biology Technology:XTL Biopharmaceuticals Announces Appointment of David Grossman and Boaz Shweiger to Board of Directors 2XTL Biopharmaceuticals Announces Appointment of David Grossman and Boaz Shweiger to Board of Directors 3Victhom announces the filing of a patent application to address sudden unexplained death in epilepsy (SUDEP) 2Victhom announces the filing of a patent application to address sudden unexplained death in epilepsy (SUDEP) 3
Takara's Mutan-Super Express Km Kit is designed to achieve site-directed mutagenesis in just one day. It is based on Oligonucleotide-directed Dual Amber (ODA) method, using the advantages of LA (Long...
... TriEx Sf9 Cells and TriEx Insect ... from pTriEx baculovirus constructs. This cell/medium combination ... cell growth and high protein expression levels ... pTriEx-1.14 vectors. Please note that our Ready-Plaque ...
...
...
Biology Products: