Navigation Links
Researchers quantify toxic ocean conditions during major extinction 93.9 million years ago
Date:10/28/2013

ef="http://earthsciences.ucr.edu/lyons.html" target="_blank">Timothy W. Lyons, a professor of biogeochemistry at UCR, Owens's former advisor and the principal investigator on the research project.

Study results appear online this week in the Proceedings of the National Academy of Sciences.

Across the event 93.9 million years ago, a major biological extinction in the marine realm has already been documented. Also associated with this event are high levels of carbon dioxide in the atmosphere, which are linked to elevated ocean and atmospheric temperatures. Associated consequences include likely enhanced global rainfall and weathering of the continents, which further shifted the chemistry of the ocean.

"Our work shows that even though only a small portion of the ocean contained toxic and metal-scavenging hydrogen sulfide, it was sufficiently large so that changes to the ocean's chemistry and biology were likely profound," Owens said. "What this says is that only portions of the ocean need to contain sulfide to greatly impact biota."

For their analysis, the researchers collected seafloor mud samples, now rock, from multiple localities in England and Italy. They then performed chemical extraction on the samples to analyze the sulfur isotope compositions in order to estimate the chemistry of the global ocean.

According to the researchers, the importance of their study is elevated by the large amount of previous work on the same interval and thus the extensive availability of supporting data and samples. Yet despite all this past research, the team was able to make a fundamental discovery about the global conditions in the ancient ocean and their impacts on life.

"Today, we are facing rising carbon dioxide contents in the atmosphere through human activities, and the amount of oxygen in the ocean may drop correspondingly in the face of rising seawa
'/>"/>

Contact: Iqbal Pittalwala
iqbal@ucr.edu
951-827-6050
University of California - Riverside
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Study by UC Santa Barbara researchers suggests that bacteria communicate by touch
2. UC Santa Barbara researchers discover genetic link between visual pathways of hydras and humans
3. Researchers attempt to solve problems of antibiotic resistance and bee deaths in one
4. UNH researchers find African farmers need better climate change data to improve farming practices
5. Ottawa researchers to lead world-first clinical trial of stem cell therapy for septic shock
6. Researchers uncover molecular pathway through which common yeast becomes fungal pathogen
7. Researchers print live cells with a standard inkjet printer
8. Columbia Engineering and Penn researchers increase speed of single-molecule measurements
9. Researchers reveal how a single gene mutation leads to uncontrolled obesity
10. Researchers discover novel therapy for Crohns disease
11. New paper by Notre Dame researchers describes method for cleaning up nuclear waste
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:9/22/2014)... September 23, 2014 A new American Cancer ... Nutrition Assistance Program (SNAP), previously known as the ... compared with income eligible non-participants. The authors say ... aimed at enhancing the dietary quality of SNAP ... low-income individuals and households with the resources to ...
(Date:9/22/2014)... HOUSTON (Sept. 22, 2014) As genetic sequencing ... care, there is a critical need to establish appropriate ... and ethical experts have said. A special policy issue ... published online today and edited by experts with ... Baylor College of Medicine gives policy makers the tools ...
(Date:9/22/2014)... that manufacture their own "antifreeze" proteins to survive ... unfortunate side effect, researchers report: The protein-bound ice ... even when temperatures warm. , The finding ... National Academy of Sciences . , "We discovered ... the evolution of antifreeze proteins in Antarctic notothenioid ...
Breaking Biology News(10 mins):Federal food program puts food on the table, but dietary quality could be improved 2Experts provide much-needed policy analysis for clinical integration of next generation sequencing 2Experts provide much-needed policy analysis for clinical integration of next generation sequencing 3Study: Antifreeze proteins in Antarctic fishes prevent freezingand melting 2Study: Antifreeze proteins in Antarctic fishes prevent freezingand melting 3
... cells, which produce electrical signals in response to vibrations within ... or trauma-related hearing loss. One way to do this could ... to grow. Researchers at Emory University School of Medicine ... cochleae of young mice can induce the formation of extra ...
... University Press (BNUP) will co-publish a new book series ... first seven titles of this series were signed by ... Yang, CEO of BNUP, at this year,s London Book ... supported by both Chinese and international funding, in large ...
... , Using the latest satellite tracking technology, conservationists from the ... Government of Mexico have completed a ground-breaking study on a ... team has produced the first published study on the use ... world,s largest ray, which can grow up to 25 feet ...
Cached Biology News:Gene therapy for hearing loss: Potential and limitations 2Springer and the Beijing Normal University Press sign agreement on new book series 2First satellite tag study for manta rays reveals habits and hidden journeys of ocean giants 2
(Date:9/23/2014)... September 23, 2014 This is ... Global and China Isopropanol (IPA) industry. The report ... definitions, applications and industry chain structure. Global market ... with a focus on history, developments, trends and ... the international and Chinese situation is also offered. ...
(Date:9/23/2014)... York , September 23, 2014 ... leading provider of  Closed System Transfer     Devices ... exclusive partnership with Taiwanese distributor MedFront Medical Technology Corporation.  Equashield,s ... in Taiwan , ... as the company continues to expand globally, and ...
(Date:9/23/2014)... (PRWEB) September 23, 2014 Dr. Williams ... third book on healthcare offers a three phase process ... century healthcare delivery system that would go far beyond ... responsibility regarding the delivery of healthcare.” , “Every effort ... has failed to provide discernable progress throughout that system ...
(Date:9/23/2014)... 2014 New spin-out from ... Cambridge Innovation Capital and Johnson & Johnson Development ... company focused on harnessing the potential of circulating ... and treatment, today announced it has raised £4m ... and including Cambridge Innovation Capital and Johnson & ...
Breaking Biology Technology:(IPA) Isopropanol Industry International & China Development Trend Analysis Now Available at DeepResearchReports.com 2(IPA) Isopropanol Industry International & China Development Trend Analysis Now Available at DeepResearchReports.com 3Equashield Enters Taiwan Following Expansion to Australia, Japan, China 2Dr. Ira Williams Offers the Healthcare Solution Necessary for Patient Safety Improvement 2Inivata Raises £4m to Realise the Potential of ctDNA Analysis to Improve Cancer Treatment Through Simple Blood Tests 2Inivata Raises £4m to Realise the Potential of ctDNA Analysis to Improve Cancer Treatment Through Simple Blood Tests 3Inivata Raises £4m to Realise the Potential of ctDNA Analysis to Improve Cancer Treatment Through Simple Blood Tests 4
... , a provider of single-molecule DNA analysis technology, announced Thursday ... type of brain tumor, known as oligodendroglioma. OpGen, based in ... and professor of genetics and chemistry at the University ... . , ,Optical mapping, invented by Schwartz, will enable researchers ...
... Roberts, former executive vice president of Oracle Corporation ... businesses can streamline operations using new technology and how ... speech was a part of Accelerate Madisons ... making businesses be more competitive and profitable. ...
... first thing to do when draining a swamp is to ... an information swamp. Information not only needs to be better ... as its passed within an organization. IT shops are skilled ... and even the old, back office systems running on mainframes. ...
Cached Biology Technology:OpGen joins UW, Henry Ford Heath in Improving Brain Tumor Treatment 2Former Oracle VP reveals thoughts on benefits of IT 2Draining the Information Swamp 2Draining the Information Swamp 3