Navigation Links
First animals oxygenated the ocean, study suggests

The evolution of the first animals may have oxygenated the earth's oceans contrary to the traditional view that a rise in oxygen triggered their development.

New research led by the University of Exeter contests the long held belief that oxygenation of the atmosphere and oceans was a pre-requisite for the evolution of complex life forms.

The study, published today in the leading journal Nature Geoscience, builds on the recent work of scientists in Denmark who found that sponges the first animals to evolve require only small amounts of oxygen.

Professor Tim Lenton of the University of Exeter, who led the new study, said: "There had been enough oxygen in ocean surface waters for over 1.5 billion years before the first animals evolved, but the dark depths of the ocean remained devoid of oxygen. We argue that the evolution of the first animals could have played a key role in the widespread oxygenation of the deep oceans. This in turn may have facilitated the evolution of more complex, mobile animals."

The researchers considered mechanisms by which the deep ocean could have been oxygenated during the Neoproterozoic Era (from 1,000 to 542 million years ago) without requiring an increase in atmospheric oxygen.

Crucial to determining oxygen levels in the deep ocean is the balance of oxygen supply and demand. Demand for oxygen is created by the sinking of dead organic material into the deep ocean. The new study argues that the first animals reduced this supply of organic matter both directly and indirectly.

Sponges feed by pumping water through their bodies, filtering out tiny particles of organic matter from the water, and thus helping oxygenate the shelf seas that they live in. This naturally selects for larger phytoplankton the tiny plants of the ocean which sink faster, also reducing oxygen demand in the water.

By oxygenating more of the bottom waters of shelf seas, the first filter-fe

Contact: Eleanor Gaskarth
University of Exeter

Page: 1 2

Related biology news :

1. Kessler Foundation implements Ekso Bionics first commercial robotic exoskeleton
2. Research reveals first evidence of hunting by prehistoric Ohioans
3. First model of how buds grow into leaves
4. American College of Rheumatology releases first classification criteria for polymyalagia rheumatica
5. Ottawa researchers to lead world-first clinical trial of stem cell therapy for septic shock
6. First complete full genetic map of promising energy crop
7. FirstMark Announces New Hire Jay Houtman as Southeast Regional Sales Manager
8. FirstMark Exhibiting at the Inaugural Atlanta Clinical Cardiology Update
9. New technology tracks sparrow migration for first time from California to Alaska
10. First mass extinction linked to marine anoxia
11. Scientists complete first-ever emperor penguin count from space
Post Your Comments:
Related Image:
First animals oxygenated the ocean, study suggests
(Date:7/30/2014)... a massive collection of 20-million-year-old amber found in the ... effort is yielding fresh insights into ancient tropical insects ... is fully curated, a task that will take many ... collection in the world, the researchers report. , ... of a pygmy locust, a tiny grasshopper the size ...
(Date:7/30/2014)... of Engineering recently received a $330,000 award from ... synthesis of organic nanorods." , According to ... and utilization of functional materials, devices, and systems ... in scaling up nanotechnology is the lack of ... one device. A research team led by Dr. ...
(Date:7/30/2014)... Wallerian degeneration is a subject of major interest ... differentially regulated during the distinct stages of Wallerian ... differentiation and dedifferentiation. Although gene expression responses in ... peripheral nerve injury are known, differences in gene ... unclear. Dr. Dengbing Yao and co-workers from Nantong ...
Breaking Biology News(10 mins):Decades-old amber collection offers new views of a lost world 2NSF grant to Wayne State supports new concept for manufacturing nanoscale devices 2
... ON (September 05, 2011) You may think your lack ... because you,re lazy, but McMaster University researchers have discovered it ... made their unexpected finding while working with healthy, specially-bred mice, ... exercise removed. The genes control the protein AMP-activated protein kinase ...
... It is now widely accepted that the species Homo ... world. But did those early humans interbreed with more ... erectus, the "upright walking man," Homo habilis, the ... cave-painting fame? Direct studies of ancient DNA from ...
... Ten variants of the deadly Escherichia coli ... sequenced across the world. The unprecedented level of collaboration ... the outbreak arose, says a scientist at the Society ... the bacterium started in early June at BGI, China. ...
Cached Biology News:McMaster researchers find missing genes may separate coach potato from active cousin 2Ancient humans were mixing it up 2Ancient humans were mixing it up 3Ancient humans were mixing it up 4Crowd-sourcing the E. coli O104:H4 outbreak 2
(Date:7/31/2014)... SoundConnect , an award winning ... to announce the addition of Adobe Connects Learning ... tools to quickly deploy and manage online courses ... for desktop and mobile learning solutions. , Adobe ... online training solution, enabling organizations to deploy, measure, ...
(Date:7/30/2014)... 30, 2014 Regulus Therapeutics Inc . ... the discovery and development of innovative medicines targeting microRNAs, ... highlights for the quarter ended June 30, 2014 on ... close. Regulus will host a conference ... 5:00 pm Eastern Daylight Time to discuss its second ...
(Date:7/30/2014)... 30, 2014 A study presented at ... and efficacy of CSL Behring,s C1 Inhibitor (C1-INH) ... in highly sensitized patients. C1-INH is a human ... system. The study shows that post-transplant ... the levels of complement components 3 and 4, ...
(Date:7/30/2014)... Selexis SA , a serial ... and mammalian cell line development, announced today new data ... be presented at the 10th Annual Cell Line ... – 10, 2014 at the Double Tree by Hilton ... abstract will be presented during an oral presentation: , ...
Breaking Biology Technology:SoundConnect Enhances Portfolio with Adobe Connect Learning Management System (LMS) 2Regulus Announces Timing for Second Quarter 2014 Financial Results Webcast and Conference Call 2Regulus Announces Timing for Second Quarter 2014 Financial Results Webcast and Conference Call 3Study Suggests C1-INH May Aid in Prevention of Antibody-Mediated Rejection Following Kidney Transplant 2Study Suggests C1-INH May Aid in Prevention of Antibody-Mediated Rejection Following Kidney Transplant 3Selexis SA to Present New Data and a Case Study at IBC’s Cell Line Development and Engineering Conference 2Selexis SA to Present New Data and a Case Study at IBC’s Cell Line Development and Engineering Conference 3
... Medco Health,Solutions, Inc. (NYSE: MHS ) Chairman ... members of his senior management team, will present an,overview ... and institutional investors during its annual Analyst Day,conference on ... of Pharmacy," is scheduled to begin at 8 a.m. ...
... Abercrombie, Pfizer R&D Head Martin,Mackay, HHS Deputy Secretary Tevi ... Agenda at FDA/CMS Summit 2007, WASHINGTON, Nov. 15 ... drug approvals. Unfortunately for the biopharma sector and,investors, it,s ... on track,to grant marketing approval to 18 or fewer ...
... Brad Thompson, President,and CEO of Oncolytics Biotech Inc. ... of the company at Toronto CFA Society on ... at the National Club, 303 Bay,Street, Toronto at ... Oncolytics is a Calgary-based biotechnology company focused on ...
Cached Biology Technology:Medco to Webcast Annual Analyst Day Conference 2So Long, Old Friend: The End of the Blockbuster Drug Era? What 2008 Holds for Bringing Drugs to Market 2So Long, Old Friend: The End of the Blockbuster Drug Era? What 2008 Holds for Bringing Drugs to Market 3Media Advisory - Oncolytics Biotech Inc. to Present at Toronto CFA Society 2
Phosphotyrosine IgG mouse monoclonal antibody: Alkaline Phosphatase conjugate...
Rabbit polyclonal to GPCR G2A ( Abpromise for all tested applications). entrezGeneID: 29933 SwissProtID: Q9UNW8...
... This reagent has been developed ... for the reduction of nonspecific background ... Traditional methods describe blocking peroxidase with ... hydrogen peroxide in combination with additional ...
Rabbit polyclonal to Wilms Tumor Protein ( Abpromise for all tested applications). entrezGeneID: 7490 SwissProtID: P19544...
Biology Products: