Imaging oxygen distribution in Marine sediments. The importance of bioturbation and sediment heterogeneity
David Bourget (Western Ontario)
David Chalmers (ANU, NYU)
Rafael De Clercq
Jack Alan Reynolds
Learn more about PhilPapers
Acta Biotheoretica (forthcoming)
The influence of sediment oxygen heterogeneity, due to bioturbation, on diffusive oxygen flux was investigated. Laboratory experiments were carried out with 3 macrobenthic species presenting different bioturbation behaviour patterns: the polychaetes Nereis diversicolor and Nereis virens, both constructing ventilated galleries in the sediment column, and the gastropod Cyclope neritea, a burrowing species which does not build any structure. Oxygen two-dimensional distribution in sediments was quantified by means of the optical planar optode technique. Diffusive oxygen fluxes (mean and integrated) and a variability index were calculated on the captured oxygen images. All species increased sediment oxygen heterogeneity compared to the controls without animals. This was particularly noticeable with the polychaetes because of the construction of more or less complex burrows. Integrated diffusive oxygen flux increased with oxygen heterogeneity due to the production of interface available for solute exchanges between overlying water and sediments. This work shows that sediment heterogeneity is an important feature of the control of oxygen exchanges at the sediment–water interface.
|Keywords||No keywords specified (fix it)|
|Categories||categorize this paper)|
Setup an account with your affiliations in order to access resources via your University's proxy server
Configure custom proxy (use this if your affiliation does not provide a proxy)
|Through your library|
References found in this work BETA
No references found.
Citations of this work BETA
No citations found.
Similar books and articles
A. Tahan & M. Monajjemi (2011). Solvent Dielectric Effect and Side Chain Mutation on the Structural Stability of Burkholderia Cepacia Lipase Active Site: A Quantum Mechanical/Molecular Mechanics Study. Acta Biotheoretica 59 (3):291-312.
R. D. Ogden, W. K. Hamilton & C. Whitcher (2010). Assisted Suicide by Oxygen Deprivation with Helium at a Swiss Right-to-Die Organisation. Journal of Medical Ethics 36 (3):174-179.
Nigel Gibson (2001). The Oxygen of the Revolution: Gendered Gaps and Radical Mutations in Frantz Fanon's a Dying Colonialism. Philosophia Africana 4 (2):47-62.
Gerhard Schurz & Ioannis Votsis, A Preliminary Application of Frame-Theory to the Philosophy of Science: The Phlogiston-Oxygen Case.
L. G. M. Baas Becking (1957). The Role of Hydrogen and Oxygen in the Inorganic Environment. Acta Biotheoretica 12 (2).
Joan Bakewell (2005). Living on the Oxygen of Ideas. The Philosophers' Magazine 32 (32):72-73.
François Guillaud & Patrick Hannaert (forthcoming). Dynamic Simulation of Mitochondrial Respiration and Oxidative Phosphorylation: Comparison with Experimental Results. Acta Biotheoretica.
Paul Thagard (1990). The Conceptual Structure of the Chemical Revolution. Philosophy of Science 57 (2):183-209.
Bernard Korzeniewski & Jean-Pierre Mazat (1996). Theoretical Studies on Control of Oxidative Phosphorylation in Muscle Mitochondria at Different Energy Demands and Oxygen Concentrations. Acta Biotheoretica 44 (3-4).
Sorry, there are not enough data points to plot this chart.
Added to index2009-01-28
Recent downloads (6 months)0
How can I increase my downloads?