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Microbial Food Web Dynamics in Response to a Saharan Dust Event: Results from a Mesocosm Study in the Oligotrophic Mediterranean Sea : Volume 11, Issue 1 (07/01/2014)

By Pulido-villena, E.

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Book Id: WPLBN0004004881
Format Type: PDF Article :
File Size: Pages 35
Reproduction Date: 2015

Title: Microbial Food Web Dynamics in Response to a Saharan Dust Event: Results from a Mesocosm Study in the Oligotrophic Mediterranean Sea : Volume 11, Issue 1 (07/01/2014)  
Author: Pulido-villena, E.
Volume: Vol. 11, Issue 1
Language: English
Subject: Science, Biogeosciences, Discussions
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2014
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Catala, P., Landa, M., Obernosterer, I., Guieu, C., Georges, C., Baudoux, A.,...Harmand, J. (2014). Microbial Food Web Dynamics in Response to a Saharan Dust Event: Results from a Mesocosm Study in the Oligotrophic Mediterranean Sea : Volume 11, Issue 1 (07/01/2014). Retrieved from http://www.ebooklibrary.org/


Description
Description: Aix-Marseille Université, Université de Toulon, CNRS/INSU, IRD, MIO, UM110, 13288, Marseille, Cedex 09, France. The significant impact of dust deposition on heterotrophic bacterial dynamics in the surface oligotrophic ocean has recently been evidenced. Considering the central role of bacteria in the microbial loop, it is likely that dust deposition also affects the structure and the functioning of the whole microbial food web. In the frame of the DUNE project, aiming to estimate the impact of dust deposition on the oligotrophic Mediterranean Sea through mesocosm experiments, the main goal of the present paper was to assess how two successive dust deposition events affect the dynamics of the microbial food web. The first dust seeding delivered new P and N to the amended mesocosms and resulted in a pronounced stimulation of bacterial respiration. It also induced pronounced, but transient, changes in the bacterial community composition. No significant effects were observed on the abundances of viruses and heterotrophic nanoflagellates. The second dust seeding also delivered new P and N to the amended mesocosms but the effect on the microbial food web was very different. Bacterial respiration remained constant and bacterial abundance decreased. Compositional changes following the second seeding were minor compared to the first one. The decrease in bacterial abundance coincided with an increase in virus abundance, resulting in higher virus: bacteria ratios throughout the second seeding period. Our study shows that dust deposition to the surface oligotrophic ocean may involve important modifications of the trophic links among the components of the microbial food web with presumed consequences on C and nutrient cycling.

Summary
Microbial food web dynamics in response to a Saharan dust event: results from a mesocosm study in the oligotrophic Mediterranean Sea

Excerpt
Azam, F.: Microbial control of oceanic carbon flux: the plot thickens, Science, 280, 694–696, 1998.; Balino, B., Fasham, M., and Bowles, M.: Ocean biogeochemistry and global change: JGOFS research highlights 1988–2000, IGBP Science, 2, 1–32, 2001.; Bonilla-Findji, O., Herndl, G. J., Gattuso, J.-P., and Weinbauer, M. G.: Viral and flagellate control of prokaryotic production and community structure in offshore Mediterranean waters, Appl. Environ. Microb., 75, 4801–4812, 2009.; Brussaard, C. P. D.: Optimization of procedures for counting viruses by flow cytometry, Appl. Environ. Microb., 70, 1506–1513, 2004.; Boras, J. A., Sala, M. M., Vázquez-Domínguez, E., Weinbauer, M. G., and Vaqué D.: Annual changes of bacterial mortality due to viruses and protists in an oligotrophic coastal (NW Mediterranean, Environ. Microbiol., 11, 1181–1193, 2009.; Boras, J. A., Sala, M. M., Baltar, F., Aristegui, J., Duarte, C. M., and Vaqué D.: Effect of viruses and protists on bacteria in eddies of the Canary Current region (subtropical northeast Atlantic), Limnol. Oceanogr., 55, 885–898, 2010.; Carlson, C. A., Ducklow, H. W., and Michales, A. F.: Annual flux of dissolved organic carbon from the euphotic zone in the Northwestern Sargasso Sea, Nature, 371, 405–408, 1994.; Christaki, U., Courties, C., Massana, R., Catala, P., Lebaron, P., Gasol, J. M., and Zubkov, M. V.: Optimized routine flow cytometric enumeration of heterotrophic flagellates using SYBR Green I, Limnol. Oceanogr.-Meth., 9, 329–339, 2011.; Delbes, C., Moletta, R., and Godon, J. J.: Monitoring of activity dynamics of an anaerobic digester bacterial community using 16S rRNA polymerase chain reaction-single-strand conformation polymorphism analysis, Environ. Microbiol., 2, 506–515, 2000.; Fagerbakke, K. M., Heldal, M., and Norland, S.: Content of carbon, nitrogen, oxygen, sulfur and phosphorus in native aquatic and cultured bacteria, Aquat. Microb. Ecol., 10, 15–27, 1996.; Fuhrman, J.: Marine viruses and their biogeochemical and ecological effects, Nature, 399, 541–548, 1999.; Goldman, J., Caron, D., and Dennet, M.: Regulation of gross growth efficiency and ammonium regeneration in bacteria by substrate $\chemC:\chemN$ ratio, Limnol. Oceanogr., 32, 1239–1252, 1987.; Guerzoni, S., Chester, R., Dulac, F., Herut, B., Loye-Pilot, M. D., Measures, C., Migon, C., Molinaroli, E., Moulin, C., Rossini, P., Saydam, C., Soudine, A., and Ziveri, P.: The role of atmospheric deposition in the biogeochemistry of the Mediterranean Sea, Prog. Oceanogr., 44, 147–190, 1999.; Guieu, C., Dulac, F., Ridame, C., and Pondaven, P.: Introduction to the project DUNE, a DUst experiment in a low Nutrient, low chlorophyll Ecosystem, Biogeosciences Discuss., 10, 12491–12527, doi:10.5194/bgd-10-12491-2013, 2013.; Herut, B., Zohary, T., Krom, M. D., Mantoura, R. F. C., Pitta, P., Psarra, S., Rassoulzadegan, F., Tanaka, T., and Thingstad, T. F.: Response of East Mediterranean surface water to Saharan dust: on-board microcosm experiment and field observations, Deep-Sea Res. Pt. II, 52, 3024–3040, 2005.; Hill, P. G., Zubkov, M. V., and Purdie, D. A.: Differential responses of Prochlorococcus and SAR11-dominated bacterioplankton groups to atmospheric dust inputs in the tropical Northeast Atlantic Ocean, FEMS Microbiol. Lett., 306, 82–89, 2010.; Jiang, S. C. and Paul, J. H.: The abundance of lysogenic bacteria in marine microbial communities as determined by prophage induction, Mar. Ecol.-Prog. Ser., 142, 27–38, 1996.; Jiao, N., Herndl, G. J., Hansell, D. A., Benner, R., Kattner, G., Wilhem, S. W., Kirchman, D. L., Weinbauer, M. G., Luo, T., Chen, F., and Azam, F.: Microbial production of recalcitrant dissolved organic matter: long-term carbon storage in the global ocean, Nat. Rev. Microbiol., 8, 593–598, 2010.; Jickells, T. D., An, Z. S., Andersen, K. K., Baker, A. R., Bergametti, G., Brooks, N., Cao, J. J., Boyd, P. W., Duce, R. A., Hu

 

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