Navigation Links
As good as gold
Date:5/10/2011

Similar to humans, the bacteria and tiny plants living in the ocean need iron for energy and growth. But their situation is quite different than ours for one, they can't exactly turn to natural iron sources like leafy greens or red meat for a pick-me-up.

So where does their iron come from? New research published by "Nature Geoscience" points to a source on the seafloor: minute particles (called nanoparticles) of pyrite, or fool's gold, from hydrothermal vents at the bottom of the ocean.

Scientists already knew the vents' cloudy plumes emitted from the earth's interior include pyrite particles, but they thought they were solids that settled back on the ocean bottom. A University of Delaware team has shown that the vents emit a significant amount of pyrite as nanoparticles, which have a diameter that is one thousand times smaller than that of a human hair. Because the nanoparticles are so small, they are dispersed into the ocean rather than falling to the bottom.

Barbara Ransom, program director in the agency that funded the research, the National Science Foundation's Division of Ocean Sciences, called the discovery "very exciting."

"These particles have long residence times in the ocean and can travel long distances from their sources, forming a potentially important food source for life in the deep sea," she said.

UD Oceanography Professor and project collaborator George Luther explained the importance of the pyrite's lengthy residence times, or how long they exist in their current form. He said the pyrite, which consists of iron and sulfur as iron disulfide, does not rapidly react with oxygen in the seawater to form oxidized iron, or "rust," allowing it to stay intact and move throughout the ocean better than other forms of iron.

"As pyrite travels from the vents to the ocean interior and toward the surface ocean, it oxidizes gradually to release iron, which becomes available in areas where iron is depleted so that organisms can assimilate it, then grow," Luther said. "It's an ongoing iron supplement for the ocean much as Geritol or multivitamins are for humans."

Growth of the bacteria and tiny plants, known as phytoplankton, can affect atmospheric oxygen and carbon dioxide levels.


'/>"/>

Contact: Andrea Boyle
aboyle@udel.edu
302-831-1421
University of Delaware
Source:Eurekalert  

Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
As good as gold
(Date:4/13/2017)... UBM,s Advanced Design and Manufacturing event in ... and evolving technology through its 3D Printing and Smart ... the expo portion of the event and feature a ... on trending topics within 3D printing and smart manufacturing. ... will take place June 13-15, 2017 at the Jacob K. ...
(Date:4/11/2017)... 11, 2017 No two people are ... the New York University Tandon School of Engineering ... found that partial similarities between prints are common ... mobile phones and other electronic devices can be ... vulnerability lies in the fact that fingerprint-based authentication ...
(Date:4/5/2017)... , April 5, 2017 Today HYPR ... that the server component of the HYPR platform is ... providing the end-to-end security architecture that empowers biometric authentication ... HYPR has already secured over 15 million users across ... manufacturers of connected home product suites and physical access ...
Breaking Biology News(10 mins):
(Date:9/21/2017)... ... September 21, 2017 , ... Executives ... the world’s most progressive pharma and biotech organizations to do more clinical trials ... and biotech events in Q4. , DrugDev will demonstrate DrugDev Spark™, the world’s ...
(Date:9/21/2017)... DIEGO, CALIF. (PRWEB) , ... September 21, 2017 , ... ... earlier this month. The organization, a worldwide society of professional women with high ... venue to hold its annual dinner. , Twelve members began with an ...
(Date:9/20/2017)... ... September 20, 2017 , ... ... appointed Vishwas Paralkar to the role of chief scientific officer. In this role, ... report to Cybrexa’s president and CEO, Per Hellsund. , “I was impressed with ...
(Date:9/20/2017)... ... September 20, 2017 , ... Proscia Inc. ... , a provider of whole slide imaging solutions, are hosting a pre-conference workshop ... entitled “Successfully Deploying a Best-in-Class Strategy for Digital Pathology,” will feature Proscia CEO, ...
Breaking Biology Technology: