Navigation Links
Small streams mitigate human influence on coastal ecosystems
Date:3/12/2008

Healthy streams play a major role in minimizing the amount of human-generated pollutants, such as nitrogen, that are delivered downstream. This ecosystem service is valuable; excess nitrogen degrades lakes and coastal oceans by stimulating algal blooms and depleting the water of oxygen. This phenomenon, also known as eutrophication, threatens fisheries around the world.

This week, a team of scientists that included Cary Institute ecologists Dr. Stuart E.G. Findlay and Dr. Amy Burgin published a Nature paper cautioning against policies and practices that result in intensive nitrogen loading to streams. Thirty-one researchers participated in the effort, which was headed by Dr. Patrick Mulholland of the Oak Ridge National Laboratory. Their recommendation is based on findings that stream networks are effective nitrogen filters, but they cannot keep pace when they are directly overloaded by nitrogen from fertilizer or human waste.

Using a non-radioactive nitrogen isotope (N-15), the research team traced the fate of nitrate additions in 72 streams across multiple land use conditions (e.g., urban, agricultural, natural conditions) in the continental U.S. and Puerto Rico. The tracer let scientists measure how far the nitrate traveled and what processes removed it from the water. At low-to-moderate addition levels, streams were effective at minimizing nitrate export downstream; under high-loading rates this efficiency collapsed.

Within the streams, nitrate was removed by two pathways. It was taken from the stream water by tiny aquatic organisms, such as algae, fungi, and bacteria. Or it was permanently removed by a bacterial process called denitrification. This occurs when microbes in the stream bed convert nitrate to nitrogen gas (N2), allowing it to return in an inert form to the atmosphere

The researchers also developed a model that predicts nitrate removal as water flows from small streams to larger rivers, and ultimatel
'/>"/>

Contact: Lori Quillen
Quillenl@ecostudies.org
845-677-7600
Institute of Ecosystem Studies
Source:Eurekalert  

Page: 1 2

Related biology news :

1. Penn engineers create carbon nanopipettes that are smaller than cells and measure electric current
2. Iowa State researchers look for smaller, cheaper, 1-dose vaccines
3. Small RNA plays parallel roles in bacterial metabolism
4. Identification of a novel class of (not-so) small RNAs
5. Sweet potato shines as new promise for small enterprise and hunger relief in developing countries
6. Small-scale fishing in Mexico rivals industrial fisheries in accidental turtle deaths
7. Research shows loggerhead sea turtles threatened by small-scale fishing operations
8. Cilia: small organelles, big decisions
9. 2007 ozone hole smaller than usual
10. New molecular clock from LLNL and CDC indicates smallpox evolved earlier than believed
11. Handbook of small grain insects available now
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Small streams mitigate human influence on coastal ecosystems
(Date:12/17/2014)... Dec. 16, 2014  Automation is fundamentally transforming ... evident than at international borders. Over the past ... have allowed veteran travelers to self process through ... (APC) Kiosks at an increasing number of airports, ... According to Maxine Most , ...
(Date:12/11/2014)... , Dec. 10, 2014  Data Sciences ... monitoring, has released a new series of digital ... preclinical toxicology researchers. M series, part of the ... collect the best possible physiologic data when incorporating ... Adding functional endpoints to toxicology studies has evolved ...
(Date:12/10/2014)... DUBLIN , Dec. 08, 2014 Research ... announced the addition of the "Biometrics Market ... http://photos.prnewswire.com/prnh/20130307/600769 ... for projects such as rural banking and upgradation ... major trends witnessed in the market. Besides the ...
Breaking Biology News(10 mins):Automated Border Control (ABC) Transforms the Global Travel Experience With More Than 2500 ABC eGates and APC Kiosks Deployed In Airports, Seaports, and Land Borders Worldwide 2New telemetry implants expected to change how large animal toxicology studies are conducted 2Biometrics Market in Japan 2014-2018: Key Vendors are DDS, Fujitsu, Hitachi and NEC 2
... created an ultrasensitive biosensor that could open up ... "personalized medicine" tailored to the specific biochemistry of ... several hundred times more sensitive than other biosensors, ... of sensors, said Muhammad A. Alam, a Purdue ...
... of many crucial molecules (such as DNA) and is a ... is a major environmental stress for plants and can lead ... their own phosphorus; they get all they need at the ... one way to maximise the amount of phosphorus in the ...
... NEW YORK, NY (May 14, 2012) -- Dr. Darja Marolt, ... Laboratory, is lead author on a study showing that human ... grafts for use in research and potential therapeutic application. Dr. ... Fellow at Columbia University in the laboratory of Dr. Gordana ...
Cached Biology News:Ultrasensitive biosensor promising for medical diagnostics 2When the soil holds not enough phosphorus 2
(Date:12/22/2014)... Dec. 22, 2014  ( www.competitivehealth.com ) — Competitive ... medical bill review and advocacy service, has signed an ... WellCard Savings discount health services marketplace. 63% ... more than they expected to pay. As part of ... costs, WellCard Savings is pleased to offer medical bill ...
(Date:12/22/2014)... 22, 2014 Fertility Associates of Memphis ... Bank USA , a network of more than 20 ... partnership, patients have fast access to a national pool ... IVF . Fertility Associates of Memphis is the only ... treatment option. , Dr. William Kutteh , director ...
(Date:12/19/2014)... BioPlus Specialty Pharmacy (BioPlus), one ... of Nick Maroulis, Pharm.D. to the newly created position ... In this position, Dr. Maroulis will continue to manage ... of our multi-site pharmacies as the company expands. Dr. ... that time he has served in many different capacities ...
(Date:12/19/2014)... Dec. 19, 2014 Bina Technologies, Inc. (Bina, ... that they have been acquired by Roche (SIX: RO, ... privately held company that provides a big data platform ... (NGS) data for the academic and translational research markets. ... and will continue to focus on development of their ...
Breaking Biology Technology:WellCard Savings Announces CoPatient Medical Bill Review Service for Members 2Fertility Associates of Memphis Announces Partnership with Donor Egg Bank USA 2Fertility Associates of Memphis Announces Partnership with Donor Egg Bank USA 3BioPlus Specialty Pharmacy Promotes Dr. Nick Maroulis to Vice President of Specialty Pharmacy Services 2Bina Technologies is acquired by Roche. 2Bina Technologies is acquired by Roche. 3
... 7 Voler Systems ( http://www.volersystems.com ) has launched ... provides full-service consulting from concept and design to production ... are not deterring Voler from investing in key programs ... reducing time-to-market for new medical devices. During the economic ...
... Ltd. announced,today that the U.S. Food and Drug Administration ... MR-guided Focused Ultrasound,(MRgFUS) system for the treatment of women ... agency allows,physicians to treat up to 100% of the ... to half the fibroid tissue. , ...
... Enhanced Functionality Empowers Users to Take Full Control ... from Assessment to Results Disclosure - while Adhering ... Choose PharmaCM to Manage Their Clinical Trial Registration ... Intrasphere Technologies ( http://www.intrasphere.com ...
Cached Biology Technology:Voler Systems Continues Investments and Expands Services 2FDA Approves Label Change for Non-Invasive Fibroid Treatment 2FDA Approves Label Change for Non-Invasive Fibroid Treatment 3Intrasphere Technologies Releases Version 1.5 of Its PharmaCM Clinical Trial Registration Solution Powered by Microsoft 2Intrasphere Technologies Releases Version 1.5 of Its PharmaCM Clinical Trial Registration Solution Powered by Microsoft 3Intrasphere Technologies Releases Version 1.5 of Its PharmaCM Clinical Trial Registration Solution Powered by Microsoft 4
Request Info...
...
... potent inhibition of RNase A-type ribonucleases Product ... of nonhuman origin that binds noncovalently and ... A, B, and C). It does not ... U2, or CL3. QIAGEN RNase Inhibitor inhibits ...
Request Info...
Biology Products: