Navigation Links
Dust deposited in oceans may carry elements toxic to marine algae
Date:3/9/2009

SANTA CRUZ, CA--Dust blown off the continents and deposited in the open ocean is an important source of nutrients for marine phytoplankton, the tiny algae that are the foundation of the ocean food web. But new findings show that some sources of dust also carry toxic elements that can kill marine phytoplankton.

Researchers discovered the toxic effects during a study of how phytoplankton respond to atmospheric aerosols deposited in the northern Red Sea. The results will be published in the online early edition of the Proceedings of the National Academy of Sciences (PNAS) the week of March 9, 2009.

"This is the first time that toxicity from atmospheric aerosols has been reported for the ocean system," said first author Adina Paytan, an associate researcher in the Insitute of Marine Sciences at the University of California, Santa Cruz.

"Oceanographers have always thought of dust deposition as good for phytoplankton, because it provides nutrients such as nitrogen, phosphorus, and iron. But we know air pollution has negative effects on the terrestrial side, and we need to think about the effects of pollutants that may be deposited in the oceans," she said.

Paytan and her coworkers collected aerosols on filters, incubated the samples with seawater, and observed the responses of phytoplankton. They found that the results depended on the wind direction. Aerosols collected from air masses originating over Europe stimulated phytoplankton growth, whereas aerosols from air originating over Africa, which carried dust from the Sahara Desert, had the opposite effect.

Aerosols from both sources supplied key nutrients such as nitrogen and phosphorus, but the Sahara sources also contained high concentrations of copper. "When we added the Sahara dust, the phytoplankton died within 24 hours," Paytan said. "We found that copper was really high in those samples, so we suspected that copper was causing the toxicity."

In
'/>"/>

Contact: Tim Stephens
stephens@ucsc.edu
831-459-2495
University of California - Santa Cruz
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Link between unexploded munitions in oceans and cancer-causing toxins determined
2. Animal trackers collaborate on new Google Earth for oceans
3. Dramatic expansion of dead zones in the oceans
4. Diatom genome helps explain success in trapping excess carbon in oceans
5. A recipe for saving the worlds oceans from an extinction crisis
6. Oceans on the precipice: Scripps scientist warns of mass extinctions and rise of slime
7. Study: Typhoons bury tons of carbon in the oceans
8. Penguins setting off sirens over health of worlds oceans
9. Ponds found to take up carbon like worlds oceans
10. Diatoms discovered to remove phosphorus from oceans
11. Viruses, oxygen and our green oceans
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/21/2014)... Millar , a professor of entomology and ... at the University of California, Riverside, has been ... International Society of Chemical Ecology ( ISCE ). , ... is the society,s highest honor. It is awarded ... chemical ecology, the study of chemicals that mediate interactions ...
(Date:7/21/2014)... to conserve water and save on your utility bill? ... published in the current issue of the journal ... The Most Effective Actions U.S. Households Can Take to ... use substantially by simple actions such as installing more ... While the suggestions may be familiar, the researchers are ...
(Date:7/21/2014)... and cheating in science are among the topics ... mycology experts in Montreal at the three International ... 27 to August 1, 2014. Some 2,000 participants ... the 14th International Congress of Bacteriology and Applied ... Eukaryotic Microbiology, and the 16th International Congress of ...
Breaking Biology News(10 mins):UC Riverside entomologist receives international honor for chemical ecology contributions 2Researchers provide guide to household water conservation 2Researchers provide guide to household water conservation 3Montreal hosts International Union of Microbiology Societies congresses 2
... grown in popularity, so have complaints of adverse side ... new study, done by chemistry students at Northern Arizona ... of tattoo inks to better understand their potential health ... national meeting of the American Chemical Society, the world's ...
... medical conference here heard that an Australian developed ... common cold virus to control cancer cell growth ... The research was presented to the third International ... 11 March by Newcastle University associate professor, Darren ...
... In a 12-hour, dual-stage surgery known to be performed ... at the University of Alabama at Birmingham on Tuesday ... surgically removing his pancreas to eliminate constant, severe pain ... of Panama City, Fla., remained anesthetized in the operating ...
Cached Biology News:Chemicals in tattoo inks need closer scrutiny 2Chemicals in tattoo inks need closer scrutiny 3Anti cancer virotherapy well tolerated in first human administration, research finds 2Rare surgery performed to remove pancreas, prevent diabetes 2
(Date:7/19/2014)... 20, 2014 United States Non-Vascular ... GlobalDatas new report, "United States Non-Vascular Stents Market ... the United States Non-Vascular Stents market. The report ... (in units) and average prices (in US dollars) ... Stents and Metal Biliary Stents (Metal Non-Covered Biliary ...
(Date:7/18/2014)... , July 18, 2014  Neogen Corporation (Nasdaq: ... , Neogen,s chief operating officer and president, has resigned, ... work as a consultant going forward on special projects. ... has been in this position since September 2013. On ... James Herbert , who has been Neogen,s chief ...
(Date:7/18/2014)... world is mostly neutral. That is, most of ... The number of electrons in the outer parts of ... of atoms. As one or more electrons are ... a much stronger positive pull from the nucleus. ... size, ensures that those electrons are less vulnerable to ...
(Date:7/18/2014)... 2014  Neurotrope, Inc. (OTCQB: NTRP) today announced that ... Co-Chairmen Charles S. Ramat and Paul ... basis, effective immediately. Messrs. Ramat and Freiman replace Dr. ... Executive Officer of Neurotrope Bioscience, Inc., (a wholly-owned subsidiary ... agreement with Neurotrope Bioscience Inc. terminated as of July ...
Breaking Biology Technology:United States Non-Vascular Stents Market Outlook to 2020 | Researchmoz 2United States Non-Vascular Stents Market Outlook to 2020 | Researchmoz 3United States Non-Vascular Stents Market Outlook to 2020 | Researchmoz 4Highly charged ions 2Highly charged ions 3Highly charged ions 4Neurotrope Board of Directors Appoints Chairmen Ramat and Freiman as Interim Co-CEOs 2Neurotrope Board of Directors Appoints Chairmen Ramat and Freiman as Interim Co-CEOs 3Neurotrope Board of Directors Appoints Chairmen Ramat and Freiman as Interim Co-CEOs 4
... , , , ... (Nasdaq: ARAY ), a global leader in the ... the treatment planning capabilities of the CyberKnife(R) Robotic Radiosurgery System ... Oncology (ESTRO) Conference on Physics and Radiation Technology for Clinical ...
... , , , ... leading provider of cGMP contract manufacturing of biologics and other key services, ... appointments of Truc Le as chief operating officer and Christopher Eso as ... in expanding its customer base and growing its manufacturing revenues, as well ...
... LEUVEN, Belgium, August 27 ThromboGenics NV,(Euronext Brussels: THR), ... treatments for eye disease, vascular disease,and cancer, is today issuing ... month period ending 30 June, 2009. , ... activities which,are key to its aim of becoming a profitable, ...
Cached Biology Technology:Accuray to Showcase CyberKnife Treatment Planning Capabilities at Preeminent Radiation Oncology Conference 2Accuray to Showcase CyberKnife Treatment Planning Capabilities at Preeminent Radiation Oncology Conference 3Accuray to Showcase CyberKnife Treatment Planning Capabilities at Preeminent Radiation Oncology Conference 4Avid Bioservices Expands Executive Team as it Prepares for Continued Growth 2Avid Bioservices Expands Executive Team as it Prepares for Continued Growth 3Avid Bioservices Expands Executive Team as it Prepares for Continued Growth 4Avid Bioservices Expands Executive Team as it Prepares for Continued Growth 5ThromboGenics NV Announces Business Update and Half Year Results 2009 2ThromboGenics NV Announces Business Update and Half Year Results 2009 3ThromboGenics NV Announces Business Update and Half Year Results 2009 4ThromboGenics NV Announces Business Update and Half Year Results 2009 5ThromboGenics NV Announces Business Update and Half Year Results 2009 6ThromboGenics NV Announces Business Update and Half Year Results 2009 7ThromboGenics NV Announces Business Update and Half Year Results 2009 8ThromboGenics NV Announces Business Update and Half Year Results 2009 9ThromboGenics NV Announces Business Update and Half Year Results 2009 10ThromboGenics NV Announces Business Update and Half Year Results 2009 11ThromboGenics NV Announces Business Update and Half Year Results 2009 12ThromboGenics NV Announces Business Update and Half Year Results 2009 13ThromboGenics NV Announces Business Update and Half Year Results 2009 14ThromboGenics NV Announces Business Update and Half Year Results 2009 15
The imaging screen-K (Kodak), is a 35 x 43 cm storage phosphor screen that is used for the quantitation and imaging of 32P, 33P, 35S, 14C, and 3H....
The optional fixed lens, 105 mm, is for use with the VersaDoc imaging systems for imaging small samples at high resolution....
The filter 695RDF55 Reflect 635 for the Molecular Imager FX is a band pass filter for Cy5 and Alexa Fluor 635 dyes....
The HQ505, 20 OptiGreen filter for the Molecular Imager FX is a band pass filter used for detection of Cy2 and FITC with 532 nm excitation....
Biology Products: