Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Vitamins Identified as Key Nutrient Which May Promote Harmful Algal Blooms in Coastal Waters

03.12.2010
Unlike other algae, nearly all harmful algal bloom species require vitamin B-12

Harmful algal blooms, which negatively affect coastal ecosystems, public health, economies and fisheries around the world, may be promoted by vitamins B-1 and B-12 according to Stony Brook University scientists, whose findings were published in an early online edition (Nov. 10) and in the current issue (Nov. 30) of Proceedings of the National Academy of Sciences (PNAS ) in an article entitled "Most harmful algal bloom species are vitamin B1 and B12 auxotrophs" (link to article: http://bit.ly/f1JeBw).

Professor Christopher J. Gobler, Ph.D., research scientist Ying Zhong Tang, and Ph.D. candidate Florian Koch of the School of Marine and Atmospheric Sciences at Stony Brook conducted experiments to evaluate whether the species of phytoplankton which form harmful algal blooms (HAB’s) require B-vitamins to grow. Harmful algal blooms are caused by phytoplankton and have a negative impact on coastal ecosystems and fisheries world-wide and cost the U.S. economy alone hundreds of millions of dollars annually. The impacts of harmful algal blooms have intensified in recent decades and most research has focused on chemical nutrients such as nitrogen and phosphorus as causative agents of these blooms. Vitamins have not been considered as prime suspects since prior investigations suggested that only small portion of phytoplankton species require B-vitamins for growth.

“Harmful algal blooms are not a new phenomenon, although many people may know them by other names such as red tides or brown tides,” Dr. Gobler said. “These events can harm humans by causing poisoning from shellfish contaminated with algal toxins and can damage marine ecosystems by killing fish and other marine life. The distribution, frequency and intensity of these events have increased across the globe and scientists have been struggling to determine why this is happening.”

Every coastal state in the United States experiences harmful algal blooms, according to Dr. Gobler.

While previous studies have examined the role of nutrients in harmful algal blooms, “the importance of coenzymes and particularly vitamins (vitamins B-1, B-7 and B-12 ) in regulating and stimulating harmful algal blooms has rarely been considered,” the researchers wrote.

“New methods have recently been developed to measure concentrations of vitamins B-1 and B-12 in the ocean and we discovered that vitamin levels were co-varying with the occurrence of HABs,” Dr. Gobler said.

The researchers examined more than 40 harmful algal bloom species in the laboratory and reported that all but one of the species tested (96%) required vitamin B-12 and that 20 of 27 species (74%) required vitamin B-1. In addition, the concentrations of vitamins B-1 and B-12 needed by the toxic algae were higher than those previously reported for other phytoplankton. The concentrations measured as needed for growth in the lab correspond closely to vitamin concentrations reported in coastal waters, suggesting that HAB demands for vitamins may exhaust the available supply of vitamins in hours to days. These findings demonstrate the potentially significant ecological role of B-vitamins in regulating the dynamics of HAB’s, the authors wrote.

The larger than expected vitamin requirements of harmful algal blooms partly stems from the fact that most of these events are caused by a class of algae called dinoflagellates. Dinoflagellates often consume large organic molecules such as amino acids and proteins that are similar to vitamins. The authors wrote “vitamins are among a suite of organic compounds dinoflagellates exploit for growth. Since dinoflagellates are notorious for the ability to form HAB’s, this study suggests vitamins are key organic compounds that may influence the occurrence of HAB’s of dinoflagellates.”

Harmful algal blooms have had a devastating impact many fisheries and ecosystems and there is great interest in curtailing these events. However, discovering the most important source of vitamins to HAB’s may prove challenging. Dr. Gobler said. “There are a lot of efforts right now to protect coastal ecosystems against HAB’s. Many efforts have been made to curb nitrogen loads since this nutrient has been considered the primary chemical promoting these events. This study demonstrates that vitamins must also be considered in order to understand the dynamics of HAB’s.” While the sources of nitrogen to coastal waters are well known, Dr. Gobler notes that, “we now need to identify the major sources vitamins promoting harmful algal blooms.”

About the School of Marine and Atmospheric Sciences The School of Marine and Atmospheric Sciences (SoMAS) is the State University of New York's center for marine and atmospheric research, education, and public service. With more than 85 faculty and staff and more than 500 students engaged in interdisciplinary research and education, SoMAS is at the forefront of advancing knowledge and discovering and resolving environmental challenges affecting the oceans and atmosphere on both regional and global scales.

Office of Media Relations | Newswise Science News
Further information:
http://www.stonybrook.edu

More articles from Life Sciences:

nachricht Scientists uncover the role of a protein in production & survival of myelin-forming cells
19.07.2018 | Advanced Science Research Center, GC/CUNY

nachricht NYSCF researchers develop novel bioengineering technique for personalized bone grafts
18.07.2018 | New York Stem Cell Foundation

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: First evidence on the source of extragalactic particles

For the first time ever, scientists have determined the cosmic origin of highest-energy neutrinos. A research group led by IceCube scientist Elisa Resconi, spokesperson of the Collaborative Research Center SFB1258 at the Technical University of Munich (TUM), provides an important piece of evidence that the particles detected by the IceCube neutrino telescope at the South Pole originate from a galaxy four billion light-years away from Earth.

To rule out other origins with certainty, the team led by neutrino physicist Elisa Resconi from the Technical University of Munich and multi-wavelength...

Im Focus: Magnetic vortices: Two independent magnetic skyrmion phases discovered in a single material

For the first time a team of researchers have discovered two different phases of magnetic skyrmions in a single material. Physicists of the Technical Universities of Munich and Dresden and the University of Cologne can now better study and understand the properties of these magnetic structures, which are important for both basic research and applications.

Whirlpools are an everyday experience in a bath tub: When the water is drained a circular vortex is formed. Typically, such whirls are rather stable. Similar...

Im Focus: Breaking the bond: To take part or not?

Physicists working with Roland Wester at the University of Innsbruck have investigated if and how chemical reactions can be influenced by targeted vibrational excitation of the reactants. They were able to demonstrate that excitation with a laser beam does not affect the efficiency of a chemical exchange reaction and that the excited molecular group acts only as a spectator in the reaction.

A frequently used reaction in organic chemistry is nucleophilic substitution. It plays, for example, an important role in in the synthesis of new chemical...

Im Focus: New 2D Spectroscopy Methods

Optical spectroscopy allows investigating the energy structure and dynamic properties of complex quantum systems. Researchers from the University of Würzburg present two new approaches of coherent two-dimensional spectroscopy.

"Put an excitation into the system and observe how it evolves." According to physicist Professor Tobias Brixner, this is the credo of optical spectroscopy....

Im Focus: Chemical reactions in the light of ultrashort X-ray pulses from free-electron lasers

Ultra-short, high-intensity X-ray flashes open the door to the foundations of chemical reactions. Free-electron lasers generate these kinds of pulses, but there is a catch: the pulses vary in duration and energy. An international research team has now presented a solution: Using a ring of 16 detectors and a circularly polarized laser beam, they can determine both factors with attosecond accuracy.

Free-electron lasers (FELs) generate extremely short and intense X-ray flashes. Researchers can use these flashes to resolve structures with diameters on the...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Leading experts in Diabetes, Metabolism and Biomedical Engineering discuss Precision Medicine

13.07.2018 | Event News

Conference on Laser Polishing – LaP: Fine Tuning for Surfaces

12.07.2018 | Event News

11th European Wood-based Panel Symposium 2018: Meeting point for the wood-based materials industry

03.07.2018 | Event News

 
Latest News

Global study of world's beaches shows threat to protected areas

19.07.2018 | Earth Sciences

New creepy, crawly search and rescue robot developed at Ben-Gurion U

19.07.2018 | Power and Electrical Engineering

Metal too 'gummy' to cut? Draw on it with a Sharpie or glue stick, science says

19.07.2018 | Materials Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>