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:7/11/2014)... have set a "mouse TRAP" to capture the early ... study published in the Journal of Clinical Investigation ... called TRAP to extract cellular and genetic information from ... at the Rockefeller Institute for Medical Research in 2008, ... machinery, or ribosomes, of the cell type of interest. ...
(Date:7/11/2014)... group members to reduce aggression and gain access to ... grooming activities shows a certain pattern across the day. ... Biology Letters . , Grooming between individuals in ... motives. To be groomed has hygienic benefits and is ... can provide access to infants, mating opportunities and high ...
(Date:7/11/2014)... risk of kidney injury related to the use of ... of HES molecules, according to a report in ... Anesthesia Research Society (IARS). , The "total mass of ... cultured human renal proximal tubule cells (PTCs), concludes the ... University Hospital Wrzburg, Austria. Other factorssuch as differences ...
Breaking Biology News(10 mins):Baboons groom early in the day to get benefits later 2In lab studies, hydroxyethyl starch has direct harmful effects on kidney cells 2
... A new neuroimaging study conducted by researchers from the ... de Montral at the International laboratory for Brain Music ... amusic individuals have more grey matter in specific regions ... the right interior frontal gyrus and the right auditory ...
... Approximately one in every 500 to 650 baby boys is ... genetic code that until a few years ago was thought ... no longer the case. A recent conference hosted by NewYork-Presbyterian ... raising awareness of the condition and the recent availability of ...
... chew up rattlesnake skin and smear it on their ... a new study by researchers at UC Davis. ... UC Davis, observed ground squirrels (Spermophilus beecheyi) and rock ... picking up pieces of shed snakeskin, chewing it and ...
Cached Biology News:Jingle bells not merry for tone-deaf individuals 2Jingle bells not merry for tone-deaf individuals 3Physician-scientists seek solutions to reproductive problems related to chromosomal variations 2Physician-scientists seek solutions to reproductive problems related to chromosomal variations 3
(Date:7/10/2014)... Boston, Mass. (PRWEB) July 10, 2014 ... , today announced that Alan Swahn, a former vice ... Terascala’s executive team as vice president of marketing. Terascala’s ... from Dell and NetApp create the highest performance and ... has been appointed to guide Terascala’s channel expansion and ...
(Date:7/10/2014)... EvoDerma ’s NOOME Anti-Aging Motion has been upgraded ... with a second treatment cup to help prevent and smooth ... is thinner on the edges for a softer contact with ... uneven surfaces on the face, neck and décolleté. Choose to ... areas such as the cheeks and neck, or opt for ...
(Date:7/10/2014)... , July 10, 2014  Kainos Capital, a ... brands, today announced that it has acquired the Slim-Fast ... in the business. Terms of the transaction were not ... and meal replacement business that markets ready-to-drink shakes, powders, ... North America and in the ...
(Date:7/10/2014)... According to the International Atomic Energy Agency (IAEA) ... terrorists acquiring sufficient quantities of plutonium or highly ... explosive device. The IAEA also notes that most ... quantities, which can be challenging to detect with ... study appearing this week in the Journal ...
Breaking Biology Technology:Terascala Expands Executive Team 2Terascala Expands Executive Team 3Introducing a New Bonus Treatment Cup for EvoDerma’s NOOME Anti-Aging Motion 2Kainos Capital Acquires Slim-Fast From Unilever 2Sensitive detection method may help impede illicit nuclear trafficking 2
... ... ... ... , ...
... ... for different body types and shampoo bottles shaped to closely match the size of ... to redesign armor for troops in Afghanistan. , ... Madison, NJ, USA (PRWEB) February 24, 2010 -- Interactive exhibits make learning ...
... ... ... , ... , , , , ...
Cached Biology Technology:Shire Provides Update on Biologics License Application (BLA) Filing for REPLAGAL(R) (agalsidase alfa) With the U.S. Food and Drug Administration (FDA) 2Shire Provides Update on Biologics License Application (BLA) Filing for REPLAGAL(R) (agalsidase alfa) With the U.S. Food and Drug Administration (FDA) 3Shire Provides Update on Biologics License Application (BLA) Filing for REPLAGAL(R) (agalsidase alfa) With the U.S. Food and Drug Administration (FDA) 4Shire Provides Update on Biologics License Application (BLA) Filing for REPLAGAL(R) (agalsidase alfa) With the U.S. Food and Drug Administration (FDA) 5Shire Provides Update on Biologics License Application (BLA) Filing for REPLAGAL(R) (agalsidase alfa) With the U.S. Food and Drug Administration (FDA) 6Shire Provides Update on Biologics License Application (BLA) Filing for REPLAGAL(R) (agalsidase alfa) With the U.S. Food and Drug Administration (FDA) 7Science by the Seat of Their Pants - Museum Goers, Industry and the Military Take Pressure Off with Body Mapping 2Science by the Seat of Their Pants - Museum Goers, Industry and the Military Take Pressure Off with Body Mapping 3Ocera Therapeutics Completes Phase 2B Enrollment in the ASTUTE Trial 2Ocera Therapeutics Completes Phase 2B Enrollment in the ASTUTE Trial 3Ocera Therapeutics Completes Phase 2B Enrollment in the ASTUTE Trial 4Ocera Therapeutics Completes Phase 2B Enrollment in the ASTUTE Trial 5
Mouse Amphiregulin MAb (Clone 206220)...
Anti-Digoxigenin-AP, Fab fragments; from sheep...
The antibody recognizes the peptide sequence ESESQGPK (aa 441-448) of human class III beta-tubulin specific for neurones....
Unique enzyme blend containing Taq and Pwo DNA Polymerase and another thermostable enzyme. The Expand 20 kbPLUS PCR System also includes an optimized reaction buffer, MgCl2 solution, and a human cont...
Biology Products: