HOME >> BIOLOGY >> NEWS
Unicellular organisms contribute more nitrogen to ocean that reported earlier

Large, nutrient-poor expanses of the open ocean are getting a substantial nitrogen influx from an abundant group of unicellular organisms that "fix," or chemically alter, nitrogen into a form usable for biological productivity.

First identified about five years ago, these organisms about 7 microns in diameter are fixing nitrogen at rates up to three times higher than previously reported for the Pacific Ocean, according to research published in the Aug. 26, 2004 edition of the journal Nature. On a transect from Oahu, Hawaii, to San Diego, Calif., researchers measured some of the highest rates in this study: Seven milligrams of nitrogen an essential nutrient for the growth of many organisms were being injected into the phytoplankton and other organic materials in every square meter of the ocean surface. "To our surprise, these unicellular nitrogen-fixers are broadly distributed spatially and vertically distributed at least down to 100 meters, and they're fixing nitrogen at quite high rates," said lead author Joe Montoya, an associate professor of biology at the Georgia Institute of Technology. "The rates we measured imply a total input of nitrogen that exceeds the rate of nitrogen fixation measured for the cyanobacteria Trichodesmium (traditionally believed to be the dominant marine nitrogen-fixer) in the Pacific Ocean. These unicells are the largest single source of nitrogen entering the water in broad areas of the ocean."

This level of nitrogen fixation in the Pacific Ocean alone accounts for about 10 percent of the total global oceanic new production of biomass, according to the researchers' preliminary calculations published in the Nature paper. "This is globally important because new production in the ocean is one of the key forces that drives the uptake of carbon dioxide from the atmosphere into the ocean," Montoya explained. "This represents a route for trapping and sequestering carbon dioxide and keeping it out of atmospheric circula
'"/>

Contact: Jane Sanders
jane.sanders@edi.gatech.edu
404-894-2214
Georgia Institute of Technology Research News
25-Aug-2004


Page: 1 2 3

Related biology news :

1. NHGRI adds 18 organisms to sequencing pipeline
2. Scientists urge caution when releasing engineered organisms into environment
3. Marsupial among model organisms next in line for sequencing
4. Study of primitive life form expected to provide clues to biological processes in higher organisms
5. Workshop takes systems view of information processing in organisms
6. UC Riverside to convene conference on genetically modified organisms, Oct. 14-17, 2003
7. Stay-at-home microbes: New study finds micro-organisms more complicated than we thought
8. DNA-repair protein functions differently in different organisms
9. UC Riverside scientists isolate microorganisms that break down a toxic pesticide
10. Scientists target microorganisms to break down toxic pesticide
11. Microorganisms are cleaning up Boston Harbor, UMass study finds

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:3/30/2017)... Trends, opportunities and forecast in this market ... (fingerprint, AFIS, iris recognition, facial recognition, hand geometry, vein ... use industry (government and law enforcement, commercial and retail, ... others), and by region ( North America ... Pacific , and the Rest of the World) ...
(Date:3/28/2017)... The report "Video Surveillance Market ... Storage Devices), Software (Video Analytics, VMS), and Service (VSaaS, ... to 2022", published by MarketsandMarkets, the market was valued ... to reach USD 75.64 Billion by 2022, at a ... year considered for the study is 2016 and the ...
(Date:3/24/2017)... Controller General of Immigration from Maldives Mr. Mohamed Anwar and ... international IAIR Award for the most innovative high security ePassport and eGates  ... ... Maldives Immigration Controller General, Mr. Mohamed Anwar ... right) have received the IAIR award for the "Most innovative high security ...
Breaking Biology News(10 mins):
(Date:10/11/2017)... ... October 11, 2017 , ... ... in its endogenous context, enabling overexpression experiments and avoiding the use of exogenous ... RNA guides is transformative for performing systematic gain-of-function studies. , This complement ...
(Date:10/11/2017)... Palo Alto, CA, USA (PRWEB) , ... October 11, 2017 , ... ... is set to take place on 7th and 8th June 2018 in San Francisco, ... and policy influencers as well as several distinguished CEOs, board directors and government officials ...
(Date:10/11/2017)... , Oct. 11, 2017  VMS BioMarketing, a leading provider ... nationwide oncology Clinical Nurse Educator (CNE) network, which will launch ... for communication among health care professionals to enhance the patient ... office staff, and other health care professionals to help women ... cancer. ...
(Date:10/11/2017)... , ... October 11, 2017 , ... Disappearing forests and ... lives of over 5.5 million people each year. Especially those living in larger cities ... Treepex - based in one of the most pollution-affected countries globally - decided to ...
Breaking Biology Technology:
Cached News: