Navigation Links
Acid raid, ozone depletion contributed to ancient extinction
Date:11/22/2013

Washington, D.C. Around 250 million years ago, at the end of the Permian period, there was a mass extinction so severe that it remains the most traumatic known species die-off in Earth's history. Some researchers have suggested that this extinction was triggered by contemporaneous volcanic eruptions in Siberia. New results from a team including Director of Carnegie's Department of Terrestrial Magnetism Linda Elkins-Tanton show that the atmospheric effects of these eruptions could have been devastating. Their work is published in Geology.

The mass extinction included the sudden loss of more than 90 percent of marine species and more than 70 percent of terrestrial species and set the stage for the rise of the dinosaurs. The fossil record suggests that ecological diversity did not fully recover until several million years after the main pulse of the extinction. One leading candidate for the cause of this event is gas released from a large swath of volcanic rock in Russia called the Siberian Traps. Using advanced 3-D modeling techniques, the team, led by Benjamin Black of the Massachusetts Institute of Technology, was able to predict the impacts of gas released from the Siberian Traps on the end-Permian atmosphere.

Their results indicate that volcanic releases of both carbon dioxide (CO2) and sulfur dioxide (SO2) could have created highly acidic rain, potentially leaching the soil of nutrients and damaging plants and other vulnerable terrestrial organisms. Releases of halogen-bearing compounds such as methyl chloride could also have resulted in global ozone collapse.

The volcanic activity was likely episodic, producing pulses of acid rain and ozone depletion. The team concluded that the resulting drastic fluctuations in pH and ultraviolet radiation, combined with an overall temperature increase from greenhouse gas emissions, could have contributed to the end-Permian mass extinction on land.

The
'/>"/>

Contact: Linda Elkins-Tanton
ltelkins@dtm.ciw.edu
617-784-3817
Carnegie Institution
Source:Eurekalert  

Page: 1 2

Related biology news :

1. Ozone treated water v. lethal microbial material
2. Houston Clean Air Network offering real-time online ozone report
3. Ozones impact on soybean yield: Reducing future losses
4. University of Illinois receives grant to study ozone resistance in corn
5. Ozone levels have sizeable impact on worker productivity
6. 2 climate scientists win 2012 Vetlesen Prize for work on ozone hole, ice cores
7. Ground-level ozone falling faster than model predicted
8. NASA pinpoints causes of 2011 Arctic ozone hole
9. Ozone masks plants volatiles, plant eating insects confused
10. Its not just the heat -- its the ozone: Study highlights hidden dangers
11. Study finds depletion of alveolar macrophages linked to bacterial super-infections
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Acid raid, ozone depletion contributed to ancient extinction
(Date:7/22/2014)... contrast to their negative reputation as disease causing ... evolutionary functions that help to shape the world ... report by the American Academy of Microbiology. , ... all life forms on the planet, from contributing ... driving major speciation events," states Marilyn Roossinck of ...
(Date:7/22/2014)... multinational, collaborative effort, researchers from the Icahn School of ... locations in the human genome associated with the risk ... on any psychiatric disorder to date, conducted with 80,000 ... point to biological mechanisms and pathways that may underlie ... the disorder, which has seen little innovation in drug ...
(Date:7/22/2014)... as a world-famous vacation spot with natural tourism resources, a ... The Korea Institute of Geoscience and Mineral Resources (KIGAM) indicated ... volcanic eruption was evident 5,000 years ago. That is the ... spewed out of a volcano 5,000 years ago in the ... the whole peninsula. , The research team led by Dr. ...
Breaking Biology News(10 mins):Report on viruses looks beyond disease 2Mount Sinai scientists and international team shed new light on schizophrenia 2Mount Sinai scientists and international team shed new light on schizophrenia 3Jeju Island is a live volcano 2
... than females are born worldwide every year. In recent decades, ... there has been an apparent decline in the ratio of ... Denmark, England, Germany, Japan and the United States. That has ... influence the probability of giving birth to a baby boy ...
... a pollen allergy, an 18-acre ragweed field sounds like ... environmental engineering researchers at The Johns Hopkins University, the ... how the troublesome weeds grow, reproduce and scatter their ... with a mix of high-tech and low-tech tools, could ...
... CORVALLIS, Ore. Generations of studies on vitamin E ... has demonstrated that the levels of this micronutrient necessary ... that have been commonly used in clinical trials. ... Biology and Medicine, researchers concluded that the levels of ...
Cached Biology News:Weight gain between first and second pregnancies associated with increased odds of male second child 2Ragweed research is nothing to sneeze at 2Ragweed research is nothing to sneeze at 3Ragweed research is nothing to sneeze at 4Vitamin E trials 'fatally flawed' 2Vitamin E trials 'fatally flawed' 3
(Date:7/22/2014)... 22, 2014 Quorum Review IRB, the industry ... large clinical trials called Quick Step™ . The offering ... address the research industry’s need for seamless study start-up with ... available for studies planning 50 or more North American investigator ... North American site count of 80 or more. Qualifying studies ...
(Date:7/22/2014)... Jersey , 22. Juli 2014 ... Life-Sciences-Industrie, hat die Ernennung von Marcus Bergler zum ... Herr Bergler hat die europäischen kommerziellen Aktivitäten von ... Bevor er sich Qforma anschloss, war er in ... Customer Information, als Vertriebsteam-Leiter Deutschland bei IMS Health ...
(Date:7/22/2014)... Greenville, SC (PRWEB) July 22, 2014 ... chorus of those who have recognized that the greatest ... inefficient, and far too often needlessly deadly while trying ... the multitude of quasi-experts seeking to transform an enormous ... detail.” , Dr. Williams, in his continuing series of ...
(Date:7/21/2014)... amount of tension to a chain of carbon atoms ... insulator, according to Rice University scientists. , Stretching the ... of carbon atoms -- by just 3 percent can ... might find useful for mechanically activated nanoscale electronics and ... Yakobson and his colleagues appears in the American Chemical ...
Breaking Biology Technology:Quorum Review IRB Launches New Quick Step™ Service for Large Clinical Trials 2Quorum Review IRB Launches New Quick Step™ Service for Large Clinical Trials 3Qforma gibt Schaffung des neuen Postens als General Manager in Europa bekannt 2Dr. Ira Williams Asks What’s Wrong With Jonathan Bush’s Book, Where Does It Hurt? 2Carbyne morphs when stretched 2Carbyne morphs when stretched 3
... Russell J. Buono and Paul J. Linser, Whitney Marine,Laboratory, ... , , ... a powerful tool , in the study ... of microinjection of foreign DNA into fertilized embryos is tedious and , ...
, , , , , , , back to top...
... Mortimer, Human Genome Center, Division,of Cell and Molecular Biology, Lawrence Berkeley Laboratory,Berkeley, California ... Introduction , ... been performed by a PEG-spheroplast procedure. ... is complicated, often unreliable, and transformation efficiencies are , ...
Cached Biology Technology:Transgenic Zebrafish by Electroporation 2Transgenic Zebrafish by Electroporation 3Transgenic Zebrafish by Electroporation 4Transgenic Zebrafish by Electroporation 5Electroporation of Yeast Artificial Chromosomes 2Electroporation of Yeast Artificial Chromosomes 3Electroporation of Yeast Artificial Chromosomes 4
... Agilent Technologies introduces an ... Series ICP-MS for Windows 2000 ... (OS). From September 2003, all ... be controlled by the new ...
... handy dispensers save space and organize ... other garb. They are the perfect ... used in labs, processing and manufacturing. ... and the particles they attract. Many ...
... critical to the maintenance of appropriate ... as important and diverse as those ... and stress response, antigen presentation, modulation ... channels, cell cycle regulation, transcription, and ...
... Normal Pooled Human Serum • Human ... who are found to be negative by ... (s) (HIV-1Ag), Antibodies to Human Immunodeficiency Virus ... Nonreactive for Hepatitis B Surface Antigen (HbsAg) ...
Biology Products: