Navigation Links
River mystery solved
Date:6/3/2011

The pristine state of unpolluted waterways may be their downfall, according to research results published in a paper this week in the journal Geophysical Research Letters.

A species of freshwater algae that lives in streams and rivers, called Didymo for Didymosphenia geminata, is able to colonize and dominate the bottoms of some of the world's cleanest waterways--precisely because they are so clear.

Didymo does so with a little help from its friends--in this case, bacteria--which allow it to make use of nutrients like phosphorus.

Blooms of Didymo, also known as "rock snot," says scientist P.V. Sundareshwar of the South Dakota School of Mines and Technology, are made up of stalks that form thick mats on the beds of oligotrophic, or low-nutrient, streams and rivers. Sundareshwar is the paper's lead author.

"In recent decades, human activities have led to many uncommon environmental phenomena," he says. "Now we have Didymo."

The freshwater diatom has become notorious. Didymo has taken over low-nutrient rivers in North America and Europe. It has also invaded water bodies in the Southern Hemisphere, including those in New Zealand and Chile.

Because its blooms alter food webs and have the potential to impact fisheries, "Didymo presents a threat to the ecosystem and economic health of these watercourses," says Sundareshwar.

Algae blooms are usually linked with the input of nutrients that fuel the growth of microscopic aquatic plants. Didymo's ability to grow prolifically in waters where nutrients such as phosphorus are in short supply puzzled scientists.

Environmental managers tried to mitigate Didymo blooms and predict their spread. But how the diatoms sustained such high growth in oligotrophic systems was unknown.

In a study funded by the National Science Foundation (NSF) and the State of South Dakota Carbon Scientist fund, Sundareshwar and colleagues revealed that Didymo i
'/>"/>

Contact: Cheryl Dybas
cdybas@nsf.gov
703-292-7734
National Science Foundation
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. Foothill yellow-legged frog provides insight on river management
2. UC Riverside licenses leading South African company to market GEM avocados
3. Study probes sources of Mississippi River phosphorus
4. Fellowship to UC Riverside botanist encourages Hispanic students to take up research
5. UC Riverside biologist elected to American Academy of Arts and Sciences
6. New citrus variety released by UC Riverside is very sweet, juicy and low-seeded
7. UC Riverside entomologists propose pesticide-free method to increase egg production
8. Climate change and evolution of Cross River gorillas
9. Some populations of Fraser River salmon more likely to survive climate change: UBC study
10. UC Riverside researcher receives $9 million USDA grant to study potato and tomato disease
11. UC Riverside geneticists to study how plants adapt to a changing environment
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
River mystery solved
(Date:9/15/2014)... disease (CVD) claims 17 million lives each year, while ... million. 1 New research presented by international scientists ... France on September 15, 2014, suggests that milk consumption ... At the Milk and Dairy Products in Human ... for hypertension and CVD was examined by Dr. Sabita ...
(Date:9/15/2014)... need for vitamin E and how much is enough, ... of this essential micronutrient are especially critical for the ... may become pregnant. , A lifelong proper intake of ... complicated by the fact that this nutrient is one ... It has been estimated that only a tiny fraction ...
(Date:9/12/2014)... , September 12, 2014 ... ( http://www.researchandmarkets.com/research/trs4c7/global ) has announced the addition ... Report 2014" report to their offering. ... Industry Report 2014 is a professional and ... the global fingerprint lock industry. , ,The ...
Breaking Biology News(10 mins):Dairy consumption linked to lower blood pressure and cardiovascular disease risk 2Vitamin E intake critical during 'the first 1,000 days' 2Vitamin E intake critical during 'the first 1,000 days' 3Global Fingerprint Lock Industry Report 2014 2
... compound found in cocoa, are so striking that it may ... health, reports Marina Murphy in Chemistry & Industry, the magazine ... Medical School, told C&I that epicatechin is so important that ... spent years studying the benefits of cocoa drinking on the ...
... joint funding from the Engineering and Physical Science Research ... develop an innovative sensor to detect bacteria. The new ... fluorescent signal when it encounters bacteria, allowing scientists to ... methodologies. , The new technology will be ...
... childbearing age struggle with the heartache of infertility. Now there ... of a mutation in a gene that causes male infertility ... dominant mutation that leads specifically to infertility in a mammal ... for similar mutations in the DNA of infertile men. , ...
Cached Biology News:Cocoa 'vitamin' health benefits could outshine penicillin 2Researchers find gene mutation that causes infertility in male mice 2
(Date:9/16/2014)... 2014 According to Jeff Howell, Partner ... ITRA Global, new development in Downtown Toronto is expanding ... approving another 755 storeys of new development last week ... will be dominating the Toronto skyline for the foreseeable ... unquenchable thirst for new development. , As the Toronto ...
(Date:9/16/2014)... September 16, 2014 RENU 28, the world's ... became available for purchase in Australia and New Zealand ... tour beginning September 16th. The tour will make stops in ... Bundaberg on the 18th, Sydney on the 20th, and Melbourne ... Australia and New Zealand and to educate people about the ...
(Date:9/15/2014)... UPTON, NYHeat drives classical phase transitionsthink solid, ... happen when the temperature drops. If phase ... where quantum mechanics reigns, subtle fluctuations can ... from the U.S. Department of Energy,s Brookhaven ... explored this frigid landscape of absolute zero ...
(Date:9/15/2014)... 2014   Global Science & Technology, Inc. ... and services for satellite and weather systems, was ... Services (OASIS) from the General Services Administration (GSA) ... provide the government best-value solutions for complex professional ... in Pool 4. The OASIS SB award has ...
Breaking Biology Technology:ITRA Global Reports Downtown Toronto Real Estate Development is in High Gear 2ITRA Global Reports Downtown Toronto Real Estate Development is in High Gear 3Global Wellness Company Hosts ASEA Australia Tour September 16-22 2Elusive quantum transformations found near absolute zero 2Elusive quantum transformations found near absolute zero 3Global Science & Technology, Inc. Awarded GSA OASIS Small Business Contract 2Global Science & Technology, Inc. Awarded GSA OASIS Small Business Contract 3
... EDMONTON, Sept. 30 /PRNewswire-FirstCall/ - Quest PharmaTech Inc. ... company developing and commercializing products for the treatment ... a pipeline of late-stage immunotherapy product candidates from ... of product candidates consists of five monoclonal antibodies ...
... ... , ... (PRWEB) September 30, 2009 -- Authenware , a leading keystroke biometric developer, today ... with software-based biometric protection for its federal employees. Calculating intrinsic behavioral typing patterns ...
... Inc. (Nasdaq: BMRN ) today announced that Jean-Jacques Bienaime, ... and webcast on Wednesday, October 28, at 5:00 p.m. ET ... U.S. / Canada Dial-in Number: 800.299.6183, ... Participant Code: 51404008, Replay Dial-in Number: 888.286.8010, ...
Cached Biology Technology:Quest PharmaTech Acquires Late-Stage Immunotherapeutic Antibody Pipeline 2Quest PharmaTech Acquires Late-Stage Immunotherapeutic Antibody Pipeline 3Quest PharmaTech Acquires Late-Stage Immunotherapeutic Antibody Pipeline 4Spain's Health Ministry Contracts Authenware to Fortify System Security Prior to Flu Season 2Spain's Health Ministry Contracts Authenware to Fortify System Security Prior to Flu Season 3BioMarin to Host Third Quarter 2009 Financial Results Conference Call and Webcast on Wednesday, October 28 at 5:00 p.m. ET 2
ANTI ALPHA FSH:B...
Collected from normal, healthy animals in carefully maintained standing herds of US orgin. Pricing: $45/unit for 1 - 10 units...
Normal donkey serum collected from healthy normal donkeys....
acridine orange 10-nonyl bromide (nonyl acridine orange)...
Biology Products: