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Projected climate change impact on Baltic Sea cyanobacteria Climate change impact on cyanobacteria

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Zitation

Hense, I., Meier, H. E. M., & Sonntag, S. (2013). Projected climate change impact on Baltic Sea cyanobacteria Climate change impact on cyanobacteria. CLIMATIC CHANGE, 119(2), 391-406. doi:10.1007/s10584-013-0702-y.


Zitierlink: https://hdl.handle.net/11858/00-001M-0000-0017-C37B-4
Zusammenfassung
Compared to other phytoplankton groups, nitrogen-fixing cyanobacteria generally prefer high water temperatures for growth and are therefore expected to benefit from global warming. We use a coupled biological-physical model with an advanced cyanobacteria life cycle model to compare the abundance of cyanobacteria in the Baltic Sea during two different time periods (1969-1998; 2069-2098). For the latter, we find prolonged growth and a more than twofold increase in the climatologically (30 years) averaged cyanobacteria biomass and nitrogen fixation. Additional sensitivity experiments indicate that the biological-physical feedback mechanism through light absorption becomes more important with global warming. In general, we find a nonlinear response of cyanobacteria to changes in the atmospheric forcing fields as a result of life-cycle related feedback mechanisms. Overall, the sensitivity of the cyanobacteria-driven system suggests that biological-physical and life-cycle related feedback mechanisms are important and must therefore be included in future projection studies.