Navigation Links
Ancient microbes responsible for breathing life into ocean 'deserts'
Date:8/23/2010

ationship of high rhenium and low molybdenum enrichments in the samples from South Africa, pointing to the presence of dissolved oxygen on the seafloor itself.

"In South Africa, samples from the continental slope beneath the shallower platform were thought to be deposited at water depths too deep for photosynthesis. So it was a big surprise that we found evidence of dissolved oxygen on the seafloor at these depths. This discovery suggests that oxygen was produced at the surface in large enough quantities that some oxygen survived as it was mixed to greater depths. That implies a significantly larger amount of oxygen production and accumulation in 'oxygen oases' than was previously realized."

A key contribution to this study came from Christopher Reinhard and Timothy Lyons, collaborators at the University of California, Riverside, and Simon Poulton at Newcastle University, who found that the chemistry of iron (Fe) in the same shales is also consistent with the presence of dissolved oxygen.

"It was especially satisfying to see two different geochemical methods rhenium and molybdenum abundances and Fe chemistry independently tell the same story," Kendall noted.

Evidence that the atmosphere contained at most minute amounts of oxygen came from measurements of the relative abundances of sulfur (S) isotopes. These measurements were performed by Alan Kaufman, a collaborator at the University of Maryland.

"Research like Brian's on the co-evolution of Earth's atmosphere, oceans and biosphere is not only important for unraveling key events in Earth history, it also has broad relevance to our search for life on other planets," explains Professor Ariel Anbar, director of the Astrobiology Program at ASU and Kendall's postdoctoral mentor. "One of the ways we will look for life on planets orbiting other stars is to look for oxygen in their atmospheres. So we want to know how the rise of oxygen relates to the emergence of photosynthe
'/>"/>

Contact: Nicole (Staab) Cassis
nstaab@asu.edu
602-710-7169
Arizona State University
Source:Eurekalert  

Page: 1 2 3 4

Related biology news :

1. Modern genetics vs. ancient frog-killing fungus
2. Genetic based human diseases are an ancient evolutionary legacy
3. 6,000km trip to reveal clues to ancient migration
4. Dry spells spelled trouble in ancient China
5. Ancient magma superpiles may have shaped the continents
6. Ancient African exodus mostly involved men, geneticists find
7. Male crickets with bigger heads are better fighters, study reveals, echoing ancient Chinese text
8. Decline of carbon-dioxide-gobbling plankton coincided with ancient global cooling
9. University of Leicester archaeologist uncovers evidence of ancient chemical warfare
10. Mountain caribous ancient ancestry revealed
11. Ancient geologic escape hatches mistaken for tube worms
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Ancient microbes responsible for breathing life into ocean 'deserts'
(Date:12/17/2014)... Dec. 16, 2014 Research and Markets ... of the "Global Chemical Sensor Market 2015-2019" ... http://photos.prnewswire.com/prnh/20130307/600769 One major ... demand for medical sensors in biomedical applications. Chemical ... quick and correct diagnosis during surgical procedures. The ...
(Date:12/15/2014)... , Dec. 12, 2014 Research and ... the addition of the "Global Facial Recognition ... http://photos.prnewswire.com/prnh/20130307/600769 ... identification of individuals. Facial recognition system measures the ... nose, jaw edges, mouth, and the distance between ...
(Date:12/11/2014)... , Dec. 09, 2014 Research and ... ( http://www.researchandmarkets.com/research/9ql3kr/biometrics_market ) has ... in India 2015-2019" report to their offering. ... this market is the adoption of multimodal biometric ... characteristic of an individual for verification and identification ...
Breaking Biology News(10 mins):Global Chemical Sensor Market 2015-2019: Key Vendors are Abbott Laboratories, Bayer, Hoffmann La-Roche, Johnson & Johnson, NGK Spark Plugs and Robert Bosch 2Global Facial Recognition Market 2015-2019: Key Vendors are 3M Cogent, Cognitec Systems, NEC and Safran Group 2Global Facial Recognition Market 2015-2019: Key Vendors are 3M Cogent, Cognitec Systems, NEC and Safran Group 3Biometrics Market in India 2015-2019: Key Vendors are 3M Cogent, NEC, Safran and Suprema 2
... NY, September 17, 2009Risk factors for metabolic syndrome, such ... levels, can increase a person,s healthcare costs nearly 1.6-fold, ... factor those costs rise an average of 24%, according ... Metabolic Syndrome and Related Disorders , a peer-reviewed ...
... the National Science Foundation have awarded $824,225 in competitive ... $2.8 million project to develop early warning forecast models ... Northwest beaches. Funds were awarded to the University of ... through the interagency Ecology and Oceanography of Harmful Algal ...
... friends were enjoying a glass of wine in the Mosel ... health benefits which studies attribute to the drink. During the ... are often just discarded as waste and the friends reasoned ... an even more concentrated form, and without the alcohol, shouldn,t ...
Cached Biology News:Metabolic syndrome risk factors drive significantly higher health care costs 2New project to forecast toxic algal blooms on Pacific Northwest beaches 2The wonders of wine 2The wonders of wine 3
(Date:12/17/2014)... 2014 Ipsen Biopharmaceuticals, Inc., an ... IPSEY), today announced that Somatuline® Depot® ... was approved by the U.S. Food and Drug ... tumors (GEP-NETs) in adult patients with unresectable, well ... to improve progression-free survival (PFS). , “The approval ...
(Date:12/17/2014)... IN (PRWEB) December 17, 2014 ... Laboratory Excellence following its most recent COLA inspection. ... by COLA, a national healthcare accreditation organization. Accreditation ... standards of quality in day-to-day operations, demonstrate continued ... pass a rigorous on-site laboratory survey. ...
(Date:12/17/2014)... 2014  Vermillion, Inc. (NASDAQ: VRML ), ... announced the next step in its expanded strategy to ... with the naming of current Chief Operating Officer, ... while current Chairman of the Board and CEO ... These changes are effective January 1, 2015. ...
(Date:12/17/2014)... Calif. , Dec. 17, 2014 ... a Phase 2 study evaluating the investigational oral ... of patients with severe, chronic itch who are ... of care, including topical steroids and antihistamines. ... change in Visual Analog Scale (VAS) itch score ...
Breaking Biology Technology:Ipsen Announces the FDA Approval of Somatuline® Depot® (lanreotide) Injection for the Treatment of Gastroenteropancreatic Neuroendocrine Tumors 2Ipsen Announces the FDA Approval of Somatuline® Depot® (lanreotide) Injection for the Treatment of Gastroenteropancreatic Neuroendocrine Tumors 3Ipsen Announces the FDA Approval of Somatuline® Depot® (lanreotide) Injection for the Treatment of Gastroenteropancreatic Neuroendocrine Tumors 4Ipsen Announces the FDA Approval of Somatuline® Depot® (lanreotide) Injection for the Treatment of Gastroenteropancreatic Neuroendocrine Tumors 5Ipsen Announces the FDA Approval of Somatuline® Depot® (lanreotide) Injection for the Treatment of Gastroenteropancreatic Neuroendocrine Tumors 6Ipsen Announces the FDA Approval of Somatuline® Depot® (lanreotide) Injection for the Treatment of Gastroenteropancreatic Neuroendocrine Tumors 7Ipsen Announces the FDA Approval of Somatuline® Depot® (lanreotide) Injection for the Treatment of Gastroenteropancreatic Neuroendocrine Tumors 8Xeno Diagnostics Receives 3rd Award for Laboratory Excellence 2Vermillion Names Valerie Palmieri CEO; James LaFrance to continue as Chairman of Board 2Vermillion Names Valerie Palmieri CEO; James LaFrance to continue as Chairman of Board 3Vermillion Names Valerie Palmieri CEO; James LaFrance to continue as Chairman of Board 4Velocity Pharmaceutical Development, LLC and Tigercat Pharma, Inc. Announce Phase 2 Results for VPD-737 in Patients With Chronic Pruritus 2Velocity Pharmaceutical Development, LLC and Tigercat Pharma, Inc. Announce Phase 2 Results for VPD-737 in Patients With Chronic Pruritus 3Velocity Pharmaceutical Development, LLC and Tigercat Pharma, Inc. Announce Phase 2 Results for VPD-737 in Patients With Chronic Pruritus 4
... Test to Assess Genetic Risk of Thrombosis Improves, ... Associated with Batch Processing, SUNNYVALE, Calif., and ... CPHD ) and Instrumentation Laboratory (IL), a leading,clinical ... Xpert (TM),HemosIL(R) FII & FV assay as a ...
... Experts from PAREXEL,International Corporation (Nasdaq: PRXL ... present on key topics at the,Drug Information ... being held March 3 - 5, 2008. ... PAREXEL,s thought leaders, selected by the DIA ...
... ANN ARBOR, Mich., and COLUMBIA, S.C., Feb. ... Office of Research & Statistics,are pleased to ... Exchange,(SCHIEx) has been named a finalist in ... Healthcare Users Group (MS-HUG) 2008 Innovation,Awards Program. ...
Cached Biology Technology:Cepheid and Instrumentation Laboratory Introduce Xpert(TM) HemosIL(R) FII & FV Assay to European Clinical Testing Market 2Cepheid and Instrumentation Laboratory Introduce Xpert(TM) HemosIL(R) FII & FV Assay to European Clinical Testing Market 3Cepheid and Instrumentation Laboratory Introduce Xpert(TM) HemosIL(R) FII & FV Assay to European Clinical Testing Market 4Cepheid and Instrumentation Laboratory Introduce Xpert(TM) HemosIL(R) FII & FV Assay to European Clinical Testing Market 5PAREXEL to Present Leading Insights Regarding Key Industry Topics at 20th Annual Drug Information Association EuroMeeting 2PAREXEL to Present Leading Insights Regarding Key Industry Topics at 20th Annual Drug Information Association EuroMeeting 3PAREXEL to Present Leading Insights Regarding Key Industry Topics at 20th Annual Drug Information Association EuroMeeting 4CareEvolution and SCHIEx Named Interoperability Finalists for 2008 Microsoft Healthcare Users Group (MS-HUG) Healthcare Innovation Awards 2CareEvolution and SCHIEx Named Interoperability Finalists for 2008 Microsoft Healthcare Users Group (MS-HUG) Healthcare Innovation Awards 3