Navigation Links
Dodds contributes to new national study on nitrogen water pollution

MANHATTAN, KAN. -- A Kansas State University professor is part of a national research team that discovered that streams and rivers produce three times more greenhouse gas emissions than estimated by the Intergovernmental Panel on Climate Change.

Through his work on the Konza Prairie Biological Station and other local streams, Walter Dodds, university distinguished professor of biology, helped demonstrate that nitrous oxide emissions from rivers and streams make up at least 10 percent of human-caused nitrous oxide emissions -- three times greater than current estimates by the climate change panel.

"This research deals with two important issues," Dodds said. "First, nitrous oxide is a potent greenhouse gas. Second, nitrous oxide also destroys ozone in the upper atmosphere, exposing us to more ultra violet radiation."

The research, "Nitrous oxide emission from denitrification in stream and river networks," appears in this week's Online Early Edition of the Proceedings of the National Academy of Sciences.

For the article, researchers from 23 institutions -- including K-State -- measured nitrous oxide production in 72 streams that drain native, urban or agricultural lands. Nine of those streams were in the Manhattan area, with three at Konza.

The level of nitrous oxide in streams and rivers is related to human activities that can release nitrogen into the environment, such as sewage runoff or crop fertilization. When this nitrogen reaches rivers and streams, it undergoes denitrification, a microbial process that converts nitrogren to nitrous oxide gas, called N2O, and an inert gas called dinitrogen, or N2.

As a greenhouse gas, nitrous oxide has global warming potential that is 300-fold greater than carbon dioxide. In the past century, concentration of atmospheric nitrous oxide has increased 20 percent, making it a strong contributor to climate change and ozone destruction.

"We show that river networks play an important role in how human nitrogen additions for crops influence the global environment," Dodds said.

The findings can lead to more effective mitigation strategies, Dodds said. Researchers suggest that nitrous oxide emissions can be reduced from river networks by changing agricultural and urban land-use practices, such as better management practices for fertilizers. By decreasing nitrogen input to watersheds, the production of nitrous oxide also diminishes.


Contact: Walter Dodds
Kansas State University

Related biology news :

1. Scientists discover why a mothers high-fat diet contributes to obesity in her children
2. Deranged calcium signaling contributes to neurological disorder, UT Southwestern researchers find
3. New research shows high-quality protein in eggs contributes to power, strength and energy
4. IFAR contributes to study that finds genes that influence the start of menstruation
5. Scientists discover new genetic variation that contributes to diabetes
6. Texas A&M spring graduate contributes to mental retardation research published in Nature
7. Think saturated fat contributes to heart disease? Think again
8. Scientists discover molecular switch that contributes to cellular aging process
9. BIO-key(R) International To Exhibit at Oracle OpenWorld
10. Sentara begins international trial -- open at only 24 US locations
11. UW science photo takes second in national contest
Post Your Comments:
(Date:11/10/2015)... LONDON , Nov. 10, 2015 /PRNewswire/ ... segmented on the basis of product, type, ... segments included in this report are consumables, ... this report are safety biomarkers, efficacy biomarkers, ... in this report are diagnostics development, drug ...
(Date:11/2/2015)...  SRI International has been awarded a contract of ... to the National Cancer Institute (NCI) PREVENT Cancer Program ... modern testing and support facilities, and analytical instrumentation to ... studies to evaluate potential cancer prevention drugs. ... Drug Development Program is an NCI-supported pipeline to bring ...
(Date:10/29/2015)... health pioneer, Joseph C. Kvedar , MD, describes ... wellness, and the business opportunities that arise from it ... Healthy Things . Long before health and wellness ... vice president, Connected Health, Partners HealthCare, was creating a ... the hospital or doctor,s office into the day-to-day lives ...
Breaking Biology News(10 mins):
(Date:12/1/2015)... Today the Allen Institute announced the opening ... South Lake Union neighborhood, the city,s biotechnology hub. ... Westlake Avenue North, the 270,000 square foot life sciences ... Science and the Allen Institute for Cell Science. ... the Allen Institute. "We started by building a map ...
(Date:12/1/2015)... MOUNTAIN VIEW, Calif. , Dec. 1, 2015 ... introduce the Transformational Health program. This program addresses ... this period of change. ... --> Logo - ... Understanding every aspect of healthcare, as well as ...
(Date:12/1/2015)... 2015 ... "2016 Europe Cell Surface Markers: Country ... Strategies, Opportunities for Suppliers--France, Germany, Italy, Spain, ... --> ) has announced the ... Surface Markers: Country Volume and Sales Forecasts, ...
(Date:12/1/2015)... MD (PRWEB) , ... December 01, 2015 , ... ... solutions provider, announces that its best selling system laboratory animal colony management software ... Cloud today, without investing in on-site IT resources., , ...
Breaking Biology Technology: