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Technical Note: a Mobile Sea-going Mesocosm System – New Opportunities for Ocean Change Research : Volume 9, Issue 9 (19/09/2012)

By Riebesell, U.

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Book Id: WPLBN0003976879
Format Type: PDF Article :
File Size: Pages 33
Reproduction Date: 2015

Title: Technical Note: a Mobile Sea-going Mesocosm System – New Opportunities for Ocean Change Research : Volume 9, Issue 9 (19/09/2012)  
Author: Riebesell, U.
Volume: Vol. 9, Issue 9
Language: English
Subject: Science, Biogeosciences, Discussions
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2012
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Riebesell, U., Krug, S. A., Fischer, M., Büdenbender, J., Lentz, U., Hoffmann, D.,...Muche, R. (2012). Technical Note: a Mobile Sea-going Mesocosm System – New Opportunities for Ocean Change Research : Volume 9, Issue 9 (19/09/2012). Retrieved from http://worldlibrary.net/


Description
Description: GEOMAR – Helmholtz Zentrum für Ozeanforschung Kiel, 24105 Kiel, Germany. One of the great challenges in ocean change research is to understand and forecast the effects of environmental changes on pelagic communities and the associated impacts on biogeochemical cycling. Mesocosms, experimental enclosures designed to approximate natural conditions, and in which environmental factors can be manipulated and closely monitored, provide a powerful tool to close the gap between single species laboratory experiments and observational and correlative approaches applied in field surveys. Existing pelagic mesocosm systems are stationary and/or restricted to well-protected waters. To allow mesocosm experimentation in a range of hydrographic conditions and in areas considered most sensitive to ocean change, we developed a mobile, sea-going mesocosm facility, the Kiel Off-Shore Mesocosms for Future Ocean Simulations (KOSMOS). The KOSMOS platform, which can be transported and deployed by mid-sized research vessels, is designed for operation in moored and free-floating mode under low to moderate wave conditions (up to 2.5 m wave heights). It encloses a water column 2 m in diameter and 15 to 25 m deep (~50–75 m3 in volume) without disrupting the vertical structure or disturbing the enclosed plankton community. Several new developments in mesocosm design and operation were implemented to (i) minimize differences in starting conditions between mesocosms, (ii) allow for extended experimental duration, (iii) precisely determine the mesocosm volume, (iv) determine air–sea gas exchange, and (v) perform mass balance calculations. After multiple test runs in the Baltic Sea, which resulted in continuous improvement of the design and handling, the KOSMOS platform successfully completed its first full-scale experiment in the high Arctic off Svalbard (78° 56.2′ N, 11° 53.6′ E) in June/July 2010. The study, which was conducted in the framework of the European Project on Ocean Acidification (EPOCA), focused on the effects of ocean acidification on a natural plankton community and its impacts on biogeochemical cycling and air/sea exchange of climate relevant gases. This manuscript describes the mesocosm hardware, its deployment and handling, CO2 manipulation, sampling and cleaning, including some further modifications conducted based on the experiences gained during this study.

Summary
Technical Note: A mobile sea-going mesocosm system – new opportunities for ocean change research

Excerpt
Barry, J. P., Widdicombe, S., and Hall-Spencer, J. M.: Effects of ocean acidification on marine biodiversity and ecosystem function, in: Ocean Acidification, edited by: Gattuso, J.-P. and Hansson, L., Oxford University Press, 192–209, 2010.; Barry, J. P., Tyrrell, T., Hansson, L., Plattner, G.-K., and Gattuso, J.-P.: Atmospheric CO2 targets for ocean acidification perturbation experiments, in: Guide to Best Practices in Ocean Acidification Research and Data Reporting, edited by: Riebesell, U., Fabry, V., Hansson, L., and Gattuso, J.-P., Office for Official Publications of the European Communities, Luxembourg, 53–66, 2011.; Beaufort, L., Probert, I., de Garidel-Thoron, T., Bendif, E. M., Ruiz-Pino, D., Metzl, N., Goyet, C., Buchet, N., Coupel, P., Grelaud, M., Rost, B., Rickaby, R. E. M., and de Vargas, C.: Sensitivity of coccolithophores to carbonate chemistry and ocean acidification, Nature, 476, 80–83, 2011.; Bellerby, R. G. J., Silyakova, A., Nondal, G., Slagstad, D., Czerny, J., De Lange, T., and Ludwig, A.: Marine carbonate system evolution during the EPOCA Arctic pelagic ecosystem experiment in the context of simulated future Arctic ocean acidification, submitted to Biogeosciences, 2012.; Brockmann, U.: Pelagic mesocosms: II. Process studies, in: Enclosed Experimental Marine Ecosystems: A Review and Recommendations, edited by: Lalli, C. M., Springer, 81–108, 1990.; Büdenbender, J., Riebesell, U., and Form, A.: Calcification of the Arctic coralline red algae Lithothamnion glaciale in response to elevated CO2, Mar. Ecol. Prog. Ser., 441, 79–87, 2011.; Carpenter, S. R.: Microcosm experiments have limited relevance for community and ecosystem ecology, Ecology, 77, 677–680, 1996.; Charalampopoulou, A., Poulton, A. J., Tyrrell, T., and Lucas, M. I.: Irradiance and pH affect coccolithophore community composition on a transect between the North Sea and the Arctic Ocean, Mar. Ecol. Prog. Ser., 431, 25–43, 2011.; Comeau, S., Gorsky, G., Jeffree, R., Teyssié, J.-L., and Gattuso, J.-P.: Impact of ocean acidification on a key Arctic pelagic mollusc (Limacina helicina), Biogeosciences, 6, 1877–1882, doi:10.5194/bg-6-1877-2009, 2009.; Czerny, J., Schulz, K. G., Boxhammer, T., Bellerby, R. G. J., Büdenbender, J., Engel, A., Krug, S. A., Ludwig, A., Nachtigall, K., Nondal, G., Niehoff, B., Siljakova, A., and Riebesell, U.: Element budgets in an Arctic mesocosm CO2 perturbation study, Biogeosciences Discuss., 9, 11885–11924, doi:10.5194/bgd-9-11885-2012, 2012a.; Czerny, J., Schulz, K. G., Krug, S. A., Ludwig, A., and Riebesell, U.: Technical Note: On the determination of enclosed water volume in large flexible-wall mesocosms, Biogeosciences Discuss., 9, 13019–13030, doi:10.5194/bgd-9-13019-2012, 2012b.; de Kluijver, A., Soetaert, K., Czerny, J., Schulz, K. G., Boxhammer, T., Riebesell, U., and Middelburg, J. J.: A 13C labelling study on carbon fluxes in Arctic plankton communities under elevated CO2 levels, Biogeosciences Discuss., 9, 8571–8610, doi:10.5194/bgd-9-8571-2012, 2012.; Drenner, R. W. and Mazumder, A.: Microcosm experiments have limited relevance for community and ecos

 

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