Articles | Volume 16, issue 1
https://doi.org/10.5194/bg-16-1-2019
https://doi.org/10.5194/bg-16-1-2019
Research article
 | 
07 Jan 2019
Research article |  | 07 Jan 2019

Controls on zooplankton methane production in the central Baltic Sea

Beate Stawiarski, Stefan Otto, Volker Thiel, Ulf Gräwe, Natalie Loick-Wilde, Anna K. Wittenborn, Stefan Schloemer, Janine Wäge, Gregor Rehder, Matthias Labrenz, Norbert Wasmund, and Oliver Schmale

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Cited articles

Bange, H. W., Bartell, U. H., Rapsomanikis, S., and Andreae, M. O.: Methane in the Baltic and Noth Seas and a reassessment of the marine emission of methane, Global Biogeochem. Cy., 8, 465–480, 1994. 
Berggreen, U., Hansen, B., and Kiørboe, T.: Food size spectra, ingestion and growth of the copepod Acartia tonsa during development: Implications for determination of copepod production, Mar. Biol., 99, 341–352, 1988. 
Bianchi, M., Marty, D., Teyssié, J.-L., and Fowler, S. W.: Strictly aerobic and anaerobic bacteria associated with sinking particulate matter and zooplankton fecal pellets, Mar. Ecol. Prog. Ser., 88, 55–60, 1992. 
Carpenter, E. J., Janson, S., Boje, R., Pollehne, F., and Chang, J.: The dinoflagellate Dinophysis norvegica: biological and ecological observations in the Baltic Sea, Eur. J. Phycol., 30, 1–9, 1995. 
Caruana, A. M. N. and Malin, G.: The variability in DMSP content and DMSP lyase activity in marine dinoflagellates, Prog. Oceanogr., 410–424, 120, 2014. 
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Short summary
The understanding of surface water methane production in the world oceans is still poor. By combining field studies and incubation experiments, our investigations suggest that zooplankton contributes to subthermocline methane enrichments in the central Baltic Sea by methane production within the digestive tract of copepods and/or by methane production through release of methane precursor substances into the surrounding water, followed by microbial degradation to methane.
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