Navigation Links
Poisonous oceans delayed animal evolution
Date:10/24/2011

"We have investigated the cycling of molybdenum (Mo) in ancient oceans by studying the elemental and isotopic composition of Mo in sedimentary rocks from Grand Canyon that formed in the oceans 750 million years ago", explains Tais W. Dahl, who did this research in collaboration with researchers from Arizona State University, Harvard University and the Nordic Center of Earth Evolution in Denmark (NordCEE).

Molybdenum tracks the presence of poisonous sulfide in ancient oceans

The study uses a new method to determine the extent of anoxia and presence of sulfide in the world oceans. Geochemical analyses of the trace element, molybdenum, in 750 million year-old rocks from Grand Canyon suggest oceans contained enormous amounts of lethal sulfide.

Molybdenum is relatively rich in today's seawater, because it is soluble in water in the presence of O2, and therefore it accumulates in modern oxygenated oceans. Conversely, molybdenum becomes insoluble in anoxic waters where sulfide is present, so it precipitates out of the oceans. The new results show that oceans contained less Mo in the past, because sulfide-rich waters extended over much greater areas than today.

Vast areas of animal-inhospitable seafloor

Today, oceans are nearly fully oxygenated and sulfide is only present in restricted areas of the ocean, such as the deepest parts of the Black Sea and the Baltic Sea. According to a hypothesis established by Donald Canfield (NordCEE) in 1998 sulfide was a much more common constituent in the oceans 1900-750 million years ago.

The new study is first to quantify the expansion of sulfide in the 'Canfield-ocean'. Model calculations for the oceanic molybdenum cycle suggest that 10-50% of the shallow oceans were covered with sulfidic waters. This is 400-800 times more than in today's oceans. The vast areas of poisonous seafloor would have made oceans inhospitable for animals. Expansive anoxic and poisonou
'/>"/>

Contact: Tais W. Dahl, PhD., Geochemistry
tdahl@biology.sdu.dk
456-550-2795
University of Southern Denmark
Source:Eurekalert  

Page: 1 2

Related biology news :

1. Natural pain relief from poisonous shrub
2. Poisonous tears
3. Poisonous prehistoric raptor discovered by research team from Kansas and China
4. Poisonous Poisson
5. 3-D microscope opens eyes to prehistoric oceans and present-day resources
6. Acidifying oceans could hit California mussels, a key species
7. The Atlas of Coasts and Oceans
8. Office of Naval Research engages international partners at OCEANS 2011
9. Significant role of oceans in onset of ancient global cooling
10. UGA scientists discover missing links in the biology of cloud formation over the oceans
11. How do you manage US oceans? Look at local successes
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Poisonous oceans delayed animal evolution
(Date:8/26/2014)... New Zealand endemic tree has for the last 31 years ... Australian shrubs and small trees. A New Zealand botanist has ... astonishing cryptic diversity behind what was long considered a single ... journal PhytoKeys . , Known to botanists ... the many discoveries made in the north-western South Island of ...
(Date:8/26/2014)... assistant professor of mathematical sciences at New Jersey Institute ... into the biological clock that sets the pace for ... humans and all other mammals with fundamental rhythms of ... experienced each day and with seasonal change. The brain,s ... of sleep/wake behavior which, when disrupted by experiences such ...
(Date:8/26/2014)... social problems such as global warming and poverty ... the burden fall on our failure as consumers ... new study in the Journal of Consumer ... solving global problems from governments to consumers and ... businesses convince politicians to encourage responsible consumption instead ...
Breaking Biology News(10 mins):And then there were 10 -- unexpected diversity in New Zealand kanuka genus Kunzea 2And then there were 10 -- unexpected diversity in New Zealand kanuka genus Kunzea 3Researching fundamental rhythms of life 2Researching fundamental rhythms of life 3An inconvenient truth: Does responsible consumption benefit corporations more than society? 2
... energy or one that,s environmentally destructive? That,s the question ... Society Forum session on fracking April 10, 2013 from 3 ... NJIT Technology and Society Forum is free and open to ... underground at high pressure to fracture rock formations in order ...
... yet available to build a comprehensive map of the activity ... world the human brain, scientists say in a newly ... and developed for the Brain Activity Mapping (BAM) Project, which ... Project did for genetics. Published in the journal ...
... prey, most of us picture stealthy lions and restless gazelle, ... But Ben Baiser, a post-doctoral fellow at the Harvard Forest ... , thinks on a more local scale. His inter-species drama ... North America, home to the carnivorous pitcher plant, Sarracenia ...
Cached Biology News:Fracking: Challenges and opportunities 2Brain Activity Mapping Project aims to understand the brain 2An inside look at carnivorous plants 2
(Date:8/26/2014)... Ga. , Aug. 26, 2014  ViveBio, ... biological sample collection, stabilization and transportation, announced today ... Laboratory Procurement Services, LLC (LPS) of ... of products in the United States ... new class of ambient temperature dried biological specimen ...
(Date:8/26/2014)... The global market for molecular diagnostics ... according to a new study by Grand View Research, ... the subsequent introduction of advanced cancer diagnostic technologies are ... the next six years. Moreover, the growing global base ... coupled with disease triggering lifestyle habits such as smoking ...
(Date:8/26/2014)... WASHINGTON , Aug. 26, 2014 ... Next Generation Dx Summit; Moving Assays to ... "Targeted Detection and Monitoring of Cell Free Tumor ... the analytical component of its Precision Cancer Monitoring ... high clinical sensitivity for the detection of tumor ...
(Date:8/26/2014)... 2014  That,s Nice LLC, a research-focused strategic marketing ... formation of a new dedicated team that will support ... will combine current and new staff in both market ... Guy Tiene has been hired ... Tiene was previously Director of Marketing for Royal DSM,s ...
Breaking Biology Technology:ViveBio and Laboratory Procurement Services Sign Agreement for Distribution of the ViveST Line of Products 2World Molecular Diagnostics Market Is Expected To Grow To $8,020.1 Million From 2014 To 2020: Grand View Research, Inc 2World Molecular Diagnostics Market Is Expected To Grow To $8,020.1 Million From 2014 To 2020: Grand View Research, Inc 3World Molecular Diagnostics Market Is Expected To Grow To $8,020.1 Million From 2014 To 2020: Grand View Research, Inc 4World Molecular Diagnostics Market Is Expected To Grow To $8,020.1 Million From 2014 To 2020: Grand View Research, Inc 5World Molecular Diagnostics Market Is Expected To Grow To $8,020.1 Million From 2014 To 2020: Grand View Research, Inc 6Highly Sensitive and Quantitative Analytical Performance is Translational for Clinical Utility of Cell-Free Tumor DNA Diagnostics 2Highly Sensitive and Quantitative Analytical Performance is Translational for Clinical Utility of Cell-Free Tumor DNA Diagnostics 3Highly Sensitive and Quantitative Analytical Performance is Translational for Clinical Utility of Cell-Free Tumor DNA Diagnostics 4That's Nice Announces Expanded Offering For Strategic Content And Public Relations 2That's Nice Announces Expanded Offering For Strategic Content And Public Relations 3
... Pharmaceuticals Inc. (Nasdaq: VNDA ), a biopharmaceutical ... product candidates for central nervous system disorders, today announced ... December 31, 2008. Vanda reported a net loss ... compared to $10.9 million for the third quarter of ...
... Development Conference features presentations from industry and academic speakers who ... and chemical industries. Topics include Chemical and Process R&D, ... by Design (QbD). , ... Columbia, ...
... New Mexico, February 10, 2009A team of Los Alamos ... multiplicationwhen a photon creates multiple electronsis a real phenomenon ... born of extraneous effects that mimic carrier multiplication. The ... of Chemical Research , shows the possibility of solar ...
Cached Biology Technology:Vanda Pharmaceuticals Reports Fourth Quarter and Full Year 2008 Results 2Vanda Pharmaceuticals Reports Fourth Quarter and Full Year 2008 Results 3Vanda Pharmaceuticals Reports Fourth Quarter and Full Year 2008 Results 4Vanda Pharmaceuticals Reports Fourth Quarter and Full Year 2008 Results 5Vanda Pharmaceuticals Reports Fourth Quarter and Full Year 2008 Results 6Vanda Pharmaceuticals Reports Fourth Quarter and Full Year 2008 Results 7Vanda Pharmaceuticals Reports Fourth Quarter and Full Year 2008 Results 8Vanda Pharmaceuticals Reports Fourth Quarter and Full Year 2008 Results 9Vanda Pharmaceuticals Reports Fourth Quarter and Full Year 2008 Results 1016th International Process Development Conference to be Held June 14-17, 2009 in Arosa, Switzerland 2Research highlights potential for improved solar cells 2Research highlights potential for improved solar cells 3
NATIVE RAT OSTEOCALCIN...
Form: Ready to use Applications: ELISA...
Goat polyclonal to p27 KIP 1 ( Abpromise for all tested applications). Antigen: Synthetic peptide: C-KRPATDDS STQNK, corresponding to Internal sequence amino acids 153-165 of Human p27 KIP 1 ...
Wnt-1 (G-19)...
Biology Products: