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Climate Change Impacts on Primary Production in Danish Waters

Explore climate change effects on primary production dynamics in inner Danish waters, examining oxygen deficiency, phytoplankton- zooplankton relationship, and biological export.

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Climate Change Impacts on Primary Production in Danish Waters

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  1. Maren Moltke LyngsgaardMarine biologist from Aarhus UniversityPhD Project: Climate change impacts on primary production dynamicsin inner Danish watersJuly 2009 – July 2012 Supervisors: Katherine Richardson (University of Copenhagen) Michael Olesen (University of Copenhagen, Helsingor) Stiig Markager (National Environmental Research Institute) Torben Vang (Aarhus University) MAREN MOLTKE LYNGSGAARD UNIVERSITY OF COPENHAGEN

  2. ECODYN:Participants: National Environmental Research Institute (NERI), Aarhus University (AU), Danish Meteorological Institute (DMI), University of Copenhagen, DTU-Aqua • Overall project title: Influence of ecological dynamics and climate change on the marine environment in Danish waters. • My project title: The influence of climate change on primary production dynamics in inner Danish waters. MAREN MOLTKE LYNGSGAARD UNIVERSITY OF COPENHAGEN

  3. Why? OXYGEN DEFICIENCY Hansen & Manscher 2008 MAREN MOLTKE LYNGSGAARD UNIVERSITY OF COPENHAGEN

  4. September August Oxygen concentration in 2003 Oxygen concentration in 2100 2100-2003 difference: Hansen & Bendtsen 2006 MAREN MOLTKE LYNGSGAARD UNIVERSITY OF COPENHAGEN

  5. September 2003 • Model results of a 30% reduction in the export of organic material to bottom waters predicts less oxygen Deficiency in the future. • Strong relationship between export production and oxygen use. 2100 2100-2003 Difference Hansen & Bendtsen 2006 MAREN MOLTKE LYNGSGAARD UNIVERSITY OF COPENHAGEN

  6. Phytoplankton Zooplankton Abundance Time of year This PhD project includes 2 leading questions: • Temperature sensitivity of subsurface photosynthesis. • Measure primary production dynamics in total watercolumn and subsurface peaks • Estimate biological export • Match-mismatch relationship between plankton groups. • Identify phytoplankton spring bloom kick off • Identify zooplankton kick off and a possible climate induced mismatch MAREN MOLTKE LYNGSGAARD UNIVERSITY OF COPENHAGEN

  7. What influences primary production in inner Danish waters? • Do we see any climate related impact on primary production today? Time series analyses How big an influence does the methods used have on possible climate change signals? Detection of seasonal changes on primary production and export of organic material in the year 2010 Field Work/ survey • Detection of phyto- and • zooplankton kick off in spring time. MAREN MOLTKE LYNGSGAARD UNIVERSITY OF COPENHAGEN

  8. Field work Achievements 2010 January February March April May June July August September October November December Oxygen production Oxygen use MAREN MOLTKE LYNGSGAARD UNIVERSITY OF COPENHAGEN

  9. Gold: Improve model inputs On primary production dynamics Thanks for listening  MAREN MOLTKE LYNGSGAARD UNIVERSITY OF COPENHAGEN

  10. CTD profiles on water chemistry, physics and biology. This supplemented by fast repetition rate Fluorometry (FRRF) Remineralisation measurements or sediment traps? Station 1. Aarhus Station 2. Helsingor MAREN MOLTKE LYNGSGAARD UNIVERSITY OF COPENHAGEN

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