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

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Autor/in:
Erscheinungsjahr:
2013
Medientyp:
Text
Schlagworte:
  • Biological-physical feedback mechanisms
  • Climate change
  • Cyanobacteria
  • Life cycle
  • N2-fixation
  • Phytoplankton
  • Atmospheric forcing
  • Climate change impact
  • Feedback mechanisms
  • Future projections
  • Life cycle model
  • Non-linear response
  • Time-periods
  • Nitrogen fixation
  • Global warming
  • absorption
  • abundance
  • atmospheric forcing
  • biomass
  • climate effect
  • cyanobacterium
  • global warming
  • growth rate
  • life cycle
  • nitrogen fixation
  • phytoplankton
  • water temperature
  • Atlantic Ocean
  • Baltic Sea
Beschreibung:
  • 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. © 2013 The Author(s).
  • 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. © 2013 The Author(s).
Lizenz:
  • info:eu-repo/semantics/openAccess
Quellsystem:
Forschungsinformationssystem der UHH
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oai:www.edit.fis.uni-hamburg.de:publications/54d56592-2d72-4c77-9fc2-e789604102dd