Cycling of Matter

Cycling of Matter

Cycling of matter and composition of the bacterioplankton community in the Southern Ocean (DFG).

This project is part of an interdisciplinary study, associated to JGOFS, on the understanding of physical, chemical and biological processes in the Polar Frontal Region between 10 and 20 °E. It is based on two cruises with RV "Polarstern" (December '95/January '96 and March-May '99). Our part studies spatio-temporal dynamics of the biomass production, turnover of dissolved amino acids, proteins and carbohydrates, and of the community structure of the heterotrophic picoplankton. Other aspects include examining relationships between the sinking flux and picoplankton consumption of organic matter in the mesopelagic zone, the adaptation of the picoplankton community to temperature, the role of phage infection in controlling heterotrophic picoplankton growth, and the role of UV-irradiation in controlling picoplankton growth and decomposing DOM.  

Simon, M., Rosenstock, B. 2007. Different coupling of dissolved amino acid, protein, and carbohydrate turnover to heterotrophic picoplankton production in the Southern Ocean in austral summer and fall. Limnol. Oceanogr. 52: 85-95.

Rosenstock, B., Zwisler, W., Simon, M. 2005. Bacterial consumption of humic and non-humic low and high molecular weight DOM and the effect of solar irradiation on the turnover of amino acids and carbohydrates in the Southern Ocean. Microb. Ecol., 50: 90-101.

Simon, M., Rosenstock, B., Zwisler, W. 2004. Coupling of epipelagic and mesopelagic heterotrophic picoplankton production to phytoplankton biomass in the Antarctic Polar Frontal Region. Limnol. Oceanogr. 49: 1035-1043.

Selje, N., Simon, M., Brinkhoff, T. 2004. A newly discovered Roseobacter cluster in temperate and polar oceans. Nature 427: 445-448.

Simon, M., Rosenstock, B., Zwisler, W. 2000. Biomass production, substrate dynamics and community structure of the heterotrophic picoplankton at the polar front and the Weddell Sea in fall. Berichte z. Polarforschung 364: 91-100.

Simon, M., Glöckner, F.O., Amann, R. 1999. Differences in the community structure are reflected by a different temperature adaptation of bacterioplankton growth in the Southern Ocean. Aquat. Microb. Ecol. 18: 275-284.

Simon, M., Hennes, K., Rosenstock, B. 1997. Bacteria, viruses and marine snow. Berichte z. Polarforschung 221: 107-112.

(Changed: 20 Apr 2022)