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Bioacid II: Anpassung Prokaryonten: [subproject] Biologische Auswirkungen der Ozeanversauerung; Vorhaben: Karbonatanalytik, Diazotrophe Fixierung u. Turnover v. Stick-stoff, Reaktion u. Anpassung heterotropher u. chemoauto-tropher Prokaryonten, Auswirk-ungen v. Stress auf die Biogeo-chemie

Heterotrophic and chemoautotrophic prokaryotes are probably differently affected by increasing CO2 concentrations. Whereas the former are mainly indirectly impacted via phytoplankton and dissolved organic matter production (DOC, supply and composition), the activity of the latter group could be directly influenced by changing pH and DIC. During BIOACID phase 2 our goal will be to examine the response and adaptation of selected prokaryotic key players, which are known to be relevant in the Baltic Sea pelagial, by a combination of laboratory and mesocosm experiments. Currently, existing experimental evolution experiments with microbes have used typical laboratory microbes (e.g., E. coli) but generally not those taxa which are environmentally relevant (Elena & Lenski 2003).


  • Bergen, B., S. Endres, A. Engel, M. Zark, T. Dittmar, U. Sommer and K. Jürgens (2016). Acidification and warming affect prominent bacteria in two seasonal phytoplankton bloom mesocosms. Environ. Microbiol. 18: 4579-4595, doi: 10.1111/1462-2920.13549