Navigation Links
More than 1: Long-reigning microbe controlling ocean nitrogen shares the throne
Date:2/25/2010

Marine scientists long believed that a microbe called Trichodesmium, a member of a group called the cyanobacteria, reigned over the ocean's nitrogen budget.

New research results reported on-line today in a paper in Science Express show that Trichodesmium may have to share its nitrogen-fixing throne: two others of its kind, small spherical species of nitrogen-fixing cyanobacteria called UCYN-A and Crocosphaera watsonii, are also abundant in the oceans.

One of them, UCYN-A, is more widely distributed than Trichodesmium, and can live in cooler waters.

Different nitrogen-fixing cyanobacteria, scientists have discovered, have varying preferences for water temperature and other environmental factors.

Pia Moisander and Jon Zehr of the University of California at Santa Cruz and their co-authors showed that actively nitrogen-fixing UCYN-A "can be found in great abundance at higher latitudes and deeper waters than Trichodesmium," says Moisander.

"Where Trichodesmium might be thought of as a warm-water microbe, UCYN-A likes it cooler," says Zehr. "This has far-reaching implications for the geographic distribution of the ocean's 'nitrogen fixers,' and for the process of nitrogen fixation itself."

According to co-author Joseph Montoya of the Georgia Institute of Technology, "we're now beginning to develop an appreciation for the biogeography of marine nitrogen fixation, and the broad range of oceanic habitats where nitrogen fixation makes a significant contribution to the overall nitrogen budget."

Most previous estimates of global nitrogen fixation were based on distributions of or factors that control the growth of Trichodesmium.

"The results of this study," says David Garrison, program director in the National Science Foundation (NSF)'s Directorate for Geosciences, "show that these novel microbes are found in the world's oceans in a distribution analogous to that of non-nitrogen-fixing cyanobacteria, which are widespread."

The research was also supported by NSF's Directorate for Biological Sciences and an NSF Science and Technology Center called C-MORE, the Center for Microbial Oceanography: Research and Education.

Trichodesmium, as well as UCYN-A and Crocosphaera watsonii, "fix" nitrogen in the seas, taking nitrogen gas from the air we breathe and converting it to chemical forms that other microorganisms can use to power their cellular machinery.

Nitrogen-fixing microorganisms are the key to the productivity of the oceans. Growth of microbes at the base of the food chain is dependent on nutrients like nitrogen, in the same way that agriculture on land depends on such nutrients.

Microorganisms that fix nitrogen play a central role, says Zehr, in the "vertical downward flux of organic matter to the deep ocean."

Life forms that are among our planet's smallest, he says, play a very large role. Through a series of steps in the nitrogen fixation process, they sequester carbon from the atmosphere, important in controlling Earth's climate.


'/>"/>

Contact: Cheryl Dybas
cdybas@nsf.gov
703-292-7734
National Science Foundation
Source:Eurekalert

Related biology news :

1. Genome analysis of marine microbe reveals a metabolic minimalist
2. Microbes produce fuels directly from biomass
3. Mystery solved: Marine microbe is source of rare nutrient
4. Hot microbes cause groundwater cleanup rethink
5. Marine microbes creating green waves in industry
6. Marine microbes creating green waves in industry
7. Microbes and their hosts -- exploring the complexity of symbiosis in DNA and cell biology
8. Methane-eating microbes can use iron and manganese oxides to breathe
9. Plant protein doorkeepers block invading microbes, study finds
10. Plant protein doorkeepers block invading microbes, study finds
11. Antibiotics take toll on beneficial microbes in gut
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/15/2016)... York , March 15, 2016 ... market report published by Transparency Market Research "Digital Door Lock ... and Forecast 2015 - 2023," the global digital door lock ... 731.9 Mn in 2014 and is forecast to grow at ... Growth of micro, small and medium enterprises (MSMEs) across the ...
(Date:3/11/2016)... , March 11, 2016 ... new market research report "Image Recognition Market by Technology ... (Marketing and Advertising), by Deployment Type (On-Premises and Cloud), ... To 2022", published by MarketsandMarkets, the global market is ... to USD 29.98 Billion by 2020, at a CAGR ...
(Date:3/9/2016)... March 9, 2016  Crossmatch ® , a ... solutions, today announced the addition of smart features ... multi-factor authentication platform. New contextual and application-specific ... step-up security where it,s needed most — while ... DC . --> Washington, ...
Breaking Biology News(10 mins):
(Date:5/26/2016)... ... 2016 , ... After several promising treatments in Panama using ... of Knowledge in Panama, a 6 year-old Duchenne’s muscular dystrophy patient received his ... following FDA approval of a second application for a single patient, investigational new ...
(Date:5/26/2016)... ... May 26, 2016 , ... FireflySci has ... in leading laboratories all over the globe. Their cute firefly logo has been ... awesome cuvettes, FireflySci makes spectrophotometer calibration standards that never require recalibration. These ...
(Date:5/25/2016)... ... May 25, 2016 , ... ... delegation at BIO 2016 in San Francisco. Located at booth number 7301, representatives ... to answer questions and discuss the Thai biotechnology and life sciences sector. ...
(Date:5/25/2016)... ... May 25, 2016 , ... ... recently became double board-certified in surgery and surgery of the hand by the ... is no stranger to going above and beyond in his pursuit of providing ...
Breaking Biology Technology: