Navigation Links
Sinking organic materials produce carbon dioxide
Date:12/8/2010

Researchers from the Max Planck Institute for Marine Microbiology in Bremen, Germany and the Massachusetts Institute of Technology (M.I.T.) in Cambridge, Massachusetts have found a remarkable effect while studying how marine particles sink, which could affect the way scientists assess global carbon fluxes. Their question - How fast does organic material and debris clumped together forming porous particles settle to the sea floor? Microbes colonizing these particles degrade the organic matter and release carbon dioxide back to the water. The downward velocity of the particles determines the amount of carbon exported to the deep sea. The results from this study are now presented in the Proceedings of the National Academy of Sciences (DOI: 10.1073/pnas.1012319108).

Structured like sponges, the marine particles are porous aggregates that are mostly void and made of water to 95% or more. Because the world's oceans are stratified due to temperature and/or salinity, water density increases with depth. On their way down to the deep ocean, marine aggregates can reach a depth where they approach neutral buoyancy, stopping in their descent until the exchange of low-density water and heavier ambient water allows settling to resume. Kolja Kindler, a scientist at the Max Planck Institute for Marine Microbiology and the Massachusetts Institute of Technology, points out that although thin layers of marine aggregates have often been observed in nature, this effect has been previously neglected in particle transport models.

In this study by Kindler and colleagues, the results from laboratory experiments and a mathematical model demonstrate this effect for the first time. As the particles are impermeable to flow, the only means of exchanging water is by diffusion. As a result, the larger the size of the aggregates, the more time they spend in the stratified layer.

Arzhang Khalili from the Max Planck Institute for Marine Microbiology says, "L
'/>"/>

Contact: Arzhang Khalili
akhalili@mpi-bremen.de
49-421-202-8636
Max-Planck-Gesellschaft
Source:Eurekalert  

Page: 1 2

Related biology news :

1. Whale sharks do the math to avoid that sinking feeling
2. WSU researchers taking sustainability of organic farming to new level
3. Is organic farming good for wildlife? It depends on the alternative
4. On organic coffee farm, complex interactions keep pests under control
5. Balanced ecosystems seen in organic ag better at controlling pests
6. Organic pesticides not always greener choice, study finds
7. Delineating primary and secondary organic carbon in neoproterozoic glacial sediments
8. New model is proposed to explain absence of organic compounds on surface of Mars
9. The Reaxys Ph.D. Prize awards innovative research in organic, organometallic and inorganic chemistry
10. Organic solids in soil may speed up bacterial breathing
11. Can organic labels backfire?
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Sinking organic materials produce carbon dioxide
(Date:4/23/2014)... is a technique used to read quickly. It ... skipping non-essential words and/ or sentences. Similarly to ... to quickly "read" genetic information. Genes that need ... the smaller the encoding message, the easier it ... from Instituto Gulbenkian de Cincia (IGC, Portugal) and ...
(Date:4/22/2014)... of Yale researchers will lead a five-year, $3 million ... events is affecting the transport of dissolved organic matter ... say could alter the chemical composition and water quality ... funding from the National Science Foundation,s MacroSystems Biology program, ... the watershed, which begins in Canada and runs through ...
(Date:4/22/2014)... International Science Consortium Ltd.,s nanotechnology expert will present a ... hazard assessment" at the 7th International Nanotoxicology Congress ... Turkey. , Dr. Monita Sharma will outline a ... National Academy of Sciences, " Toxicity Testing in the ... recommends use of non-animal methods involving human cells and ...
Breaking Biology News(10 mins):Cell division speed influences gene architecture 2Connecticut River watershed study will assess impacts of extreme rain events 2Connecticut River watershed study will assess impacts of extreme rain events 3
... 2012 The Crop Science Society of America (CSSA) announces ... their Annual Meetings, Oct. 21-24, 2012 in Cincinnati, OH. Members ... achievements and meritorious service. Only 0.3 percent of the Society,s ... class of CSSA Fellows are: Marc C. Albertsen, ...
... biological cells like a skin. They also surround organelles ... division. Scientists have long known in principle how biomembranes ... a role in maintaining the optimal distance between neighboring ... with the help of computer simulations, scientists of the ...
... Bioluminescence may play a key role in successful foraging ... research published Aug. 29 in the open access journal ... led by Jade Vacqui-Garcia, monitored the diving behaviour of ... Ocean that were also equipped with light detectors. The ...
Cached Biology News:Crop Science Society of America presents 2012 class of fellows 2Crop Science Society of America presents 2012 class of fellows 3Keep your distance! Why cells and organelles don't get stuck 2
(Date:1/14/2014)... Date: Friday, April 11, 2014 , Time: 6 ... Almshouse Road, Warrington, Pa. , Details: The Hepatitis ... finding a cure for hepatitis B and improving the quality ... Crystal Ball on Friday, April 11 at Warrington Country Club ...
(Date:1/14/2014)... NY (PRWEB) January 14, 2014 EquitiesIQ, ... Alliqua, Inc. (OTCQB: ALQA). Alliqua is an emerging biomedical ... serve the wound care market. , Free report download: ... restructured with a seasoned management team and Board, which ...
(Date:1/14/2014)... , Jan. 14, 2014  RXi Pharmaceuticals Corporation (OTCQX: ... and commercializing innovative therapies addressing major unmet medical ... received the Notice of Allowance from the United ... self-delivering RNAi compounds (sd-rxRNA®), for the treatment of ...
(Date:1/14/2014)... Rochester, NY (PRWEB) January 14, 2014 During ... is now known as “The Doctor’s Plague.” In this time ... their hands. This led, at times, to the death of ... staff today don’t know that they may be unwittingly transmitting ...
Breaking Biology Technology:Hepatitis B Foundation to Host Annual Crystal Ball Gala 2EquitiesIQ Initiates Coverage of Alliqua, Inc. 2EquitiesIQ Initiates Coverage of Alliqua, Inc. 3RXi Pharmaceuticals Receives US Notice of Allowance for a Key Patent Relating to its Self-Delivering Technology with sd-rxRNAs targeting CTGF, including RXI-109, for the Treatment of Fibrotic Disorders 2RXi Pharmaceuticals Receives US Notice of Allowance for a Key Patent Relating to its Self-Delivering Technology with sd-rxRNAs targeting CTGF, including RXI-109, for the Treatment of Fibrotic Disorders 3Study: Fatigued Medical Interns Infect Their Patients with Herpes Viruses; The CBCD Sees a Parallel with “The Doctor’s Plague” 2Study: Fatigued Medical Interns Infect Their Patients with Herpes Viruses; The CBCD Sees a Parallel with “The Doctor’s Plague” 3
... EASTON, Mass., March 6 Pressure,BioSciences, Inc. (Nasdaq: ... teleconference to discuss its 2007 financial results and to ... teleconference either,by telephone or through a live web-cast. The ... March 12, 2008, Time: 4:30 p.m. Eastern Daylight ...
... to Support European Partnerships, ALAMEDA, Calif., and ... collaboration with Novartis Pharma AG to give Novartis,access ... Technology Access Program (ETAP). Terms of the collaboration,were ... opening of a,facility in Paris, France to support ...
... Recently the State of,Brandenburg, and the EU, ... Alcat Europe, GmbH, covering marketing and employee costs ... laboratory company located in the BioTech Park in,Hennigsdorf ... food and,chemical sensitivities through the Alcat test method. ...
Cached Biology Technology:Pressure BioSciences, Inc. to Discuss 2007 Financial Results and Provide Business Update 2Singulex Collaborates With Large Pharmaceutical Company in Erenna(TM) Technology Access Program 2European Union, State of Brandenburg, Award Grants to Alcat Europe, GmbH 2
... Sequencer 20 System revolutionizes DNA sequencing, delivering ... The Genome Sequencer 20 System includes: ... and consumables for library construction, amplification, and ... de novo assembly The ...
... The RapidVUE is a particle shape and ... has been designed with the utmost simplicity in ... sample delivery module and an optical bench. The ... allows for easy upgrade for different applications such ...
... The ProteoSpin Detergent Clean-up Micro Kit provides ... removal of SDS, Triton X-100 and other detergents ... spin-column chromatography using Norgens patented protein resin as ... processing 2 50 g of either acidic or ...
... degradation is critical to the maintenance ... regulatory proteins as important and diverse ... heat shock and stress response, antigen ... and ion channels, cell cycle regulation, ...
Biology Products: