Navigation Links
Nitrogen from pollution, natural sources causes growth of toxic algae, study finds
Date:2/6/2013

lution-caused nitrogen forms equally support the growth of the harmful Pseudo-nitzschia algae and cause the production of the domoic acid, but in all cases the natural form of nitrogen caused the most toxic cells.

They also found that these small diatoms became particularly toxic under low light levels a condition that usually slows the growth of phytoplankton. The species, P. cuspidata, underwent an up to 50 fold increase in toxicity under low light levels compared to the conditions that are thought to normally favor phytoplankton growth.

Scientists already know that in some large-celled species of Pseudo-nitzschia their toxicity increases when the cells grow slower, but in previous studies the slowing of cellular growth was due to the limitation of vital nutrients, such as silicate. However Cochlan's latest study found that the toxicity of these small toxigenic diatoms is affected by the type of nitrogen they consume. He found that under low light levels -- leading to slow growth -- phytoplankton cells that were fed on naturally occurring nitrate were more toxic than cells that were fed on either urea or ammonium caused by pollution.

"Our results demonstrate that the reason for the growth of these specific harmful algal blooms off the coast of North America from British Columbia to California may in fact be due to totally natural causes," Cochlan said.

Such toxic algal blooms may be largely supported by the natural upwelling of nitrogen. However, Cochlan cautions that when the pattern of upwelling is weaker, nitrogen from pollution could play an important role in sustaining a "seed population" of harmful algae a remnant that keeps the bloom going until upwelling resumes and the bloom is able to grow again and perhaps increase their toxic effect on the marine ecosystem.

"This is the first physiological study to look at the environmental conditions that promote both the growth and the toxicity o
'/>"/>

Contact: Elaine Bible
ebible@sfsu.edu
415-405-3606
San Francisco State University
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. Lower nitrogen losses with perennial biofuel crops
2. Researchers to study impacts of pollutant nitrogen on plant species diversity
3. How much nitrogen is fixed in the ocean?
4. Scientists develop new carbon accounting method to reduce farmers use of nitrogen fertilizer
5. Nitrogen pollution changing Rocky Mountain National Park vegetation, says CU-Boulder-led study
6. Modern hybrid corn makes better use of nitrogen, study shows
7. Carbon dioxide from water pollution, as well as air pollution, may adversely impact oceans
8. Cut emissions further or face risks of high air pollution, study shows
9. Recreating natural complex gene regulation
10. Wallaces century-old map of natural world updated
11. New and revised standards for omega-3s, natural sweeteners and other food ingredients proposed
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Nitrogen from pollution, natural sources causes growth of toxic algae, study finds
(Date:12/5/2014)... Calif. , Dec. 4, 2014 ... has boosted investments in new testing and inspection ... also given rise to a range of innovative ... the requirements of Generation Y, which is generally ... As a result, product development strategies of test ...
(Date:12/3/2014)... Dec. 2, 2014   Marvin Test Solutions ... test solutions for military, aerospace, and manufacturing organizations, ... its successful TS-900 PXI semiconductor test platform ... of high-end systems to customers at a fraction ... to traditional ATE. "Our semiconductor ...
(Date:11/21/2014)... 19, 2014  Earlier this year Donald Spector ... and one of the most prolific inventors in the ... transmitted from Smartphones to third party agencies. Spector envisioned ... one of the earliest known patents in this area. ... the military, child care, elder care and hospital applications. ...
Breaking Biology News(10 mins):Emerging Technologies Enable Smarter Monitoring of Assets, Push Industrial Testing, Inspection and Monitoring Market 2Emerging Technologies Enable Smarter Monitoring of Assets, Push Industrial Testing, Inspection and Monitoring Market 3Emerging Technologies Enable Smarter Monitoring of Assets, Push Industrial Testing, Inspection and Monitoring Market 4Marvin Test Solutions Brings New Capabilities to PXI-Based Semiconductor Test with TS-960 2Marvin Test Solutions Brings New Capabilities to PXI-Based Semiconductor Test with TS-960 3Patented Biosensor Wearable Technology Provides a More Civilized Method of Quarantine 2Patented Biosensor Wearable Technology Provides a More Civilized Method of Quarantine 3Patented Biosensor Wearable Technology Provides a More Civilized Method of Quarantine 4
... the possible inventory of molecules available to the ... research professor at Arizona State University, found that ... blazing fireball over California last year, contains organic ... findings suggest a far greater availability of extraterrestrial ...
... of Pharmaceutical Scientists (AAPS) WHAT: ... share the latest groundbreaking scientific discoveries and industry developments ... event will bring together more than 8,000 scientists, business ... initiatives underway aimed at improving global health through advances ...
... have discovered a new defense mechanism that the immune ... how a novel protein unexpectedly activates an immune response ... get rid of tumour cells. This research was done ... July 2013 in Nature Immunology ., 2. The immune ...
Cached Biology News:ASU scientists strike scientific gold with meteorite 2Novel mechanism discovered in first line of immune defense 2
(Date:12/17/2014)... (PRWEB) December 17, 2014 Gene ... that it has entered into a technology access ... (ADM) to apply DNA2.0’s proprietary protein engineering technology, ... process. , “We are extremely excited that the ... platform. This proprietary bioengineering technology has now ...
(Date:12/17/2014)... SOUTH SAN FRANCISCO, Calif. , Dec. 17, ... positive results of a Phase 2 study evaluating ... for the treatment of patients with severe, chronic ... the current standard of care, including topical steroids ... endpoint was percent change in Visual Analog Scale ...
(Date:12/15/2014)...  GlassesOff Inc. (OTCBB: GLSO) announced today the appointment ... director of the Company,s Board of Directors. ... its CEO until its acquisition by Stanley Black ... Recognized as the inventor of the first Wi-Fi-based Active ... -based RFID solutions focused on improving operational efficiency, safety ...
(Date:12/13/2014)... (PRWEB) December 12, 2014 Clarassance, a ... announced its new name: Therabron Therapeutics , Inc. ... and bronchioles (a type of structure in the lungs ... company’s mission to develop novel protein therapeutics for the ... directors decided to change the name to mark the ...
Breaking Biology Technology:ADM and DNA2.0 Enter Into Protein Engineering Technology Access and Service Agreement 2Velocity Pharmaceutical Development, LLC and Tigercat Pharma, Inc. Announce Phase 2 Results for VPD-737 in Patients With Chronic Pruritus 2Velocity Pharmaceutical Development, LLC and Tigercat Pharma, Inc. Announce Phase 2 Results for VPD-737 in Patients With Chronic Pruritus 3Velocity Pharmaceutical Development, LLC and Tigercat Pharma, Inc. Announce Phase 2 Results for VPD-737 in Patients With Chronic Pruritus 4AeroScout Founder Joins GlassesOff's Board of Directors 2AeroScout Founder Joins GlassesOff's Board of Directors 3Maryland-based Biotech Company's Path Forward in Treating Respiratory Diseases Sparks Name Change 2
... - Oncothyreon Inc.,(Nasdaq: ONTY ) (TSX: ... and,Trademark office has issued a patent for ... development. The newly issued patent, U.S. Patent,# ... matter of PX-867,and pharmaceutical preparations containing PX-867., ...
... 3SBio Inc.,(Nasdaq: SSRX ) ("3SBio" or ... focused on researching, developing, manufacturing and,marketing biopharmaceutical ... board of directors has approved a share ... 3SBio to purchase up to US$20 million ...
... Resubmit With New Data from Ongoing Studies, CAMBRIDGE, ... today announced the withdrawal of the European application,to extend ... elderly patients with acute myeloid leukemia (AML). This,application and ... by Bioenvision,Ltd. before the company was acquired by Genzyme ...
Cached Biology Technology:Oncothyreon announces issuance of patent for PX-867 2Oncothyreon announces issuance of patent for PX-867 33SBio Inc. Approves Share Repurchase Program 2Genzyme Withdraws Bioenvision's European Filing of Evoltra(R) in Elderly AML Patients 2Genzyme Withdraws Bioenvision's European Filing of Evoltra(R) in Elderly AML Patients 3
For removal of the zona pellucida. Sterile, Mouse Embryo tested...
A substrate for all AChE-based EIA kits....
... Degranulation, the secretion of cytoplasmic granules, ... inflammatory response of leukocytes (e.g. basophils, ... addition to histamine, these secretory granules ... cytokines, chemokines, and many proteases (Hallgren, ...
... AGI provides both long and short-term enriched ... animals in both quarantine and non-quarantine settings ... are also available utilizing our state-of-the-art social ... is equipped with on site CDC quarantine ...
Biology Products: