Responses of filamentous cyanobacteria to natural and anthropogenic changes in the Baltic Sea

The studies concentrated on 2 diazotrophic cyanobacteria species, Nodularia spumigena and Aphanizomenon sp.. The dissertation includes diurnal observations, laboratory and field studies. The experiments aimed to observe variations concerning day/night rhythms and anthropogenic induced changes of pCO2 levels. I showed 2 to 4 fold diurnal variations within DIC, N2, DIP incorporations, related to daytime and bloom development. Further I showed stimulated C and N2 fixation rates with increasing pCO2 at sufficient DIP concentrations. Reduced or depleted DIP concentrations debate this effect.

Isensee K., 2013. Responses of filamentous cyanobacteria to natural and anthropogenic changes in the Baltic Sea. PhD thesis, Universität Rostock, 166 pp. Thesis.


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