Maren Moltke Lyngsgaard Marine biologist from Aarhus University

Maren Moltke Lyngsgaard Marine biologist from Aarhus University Ph. D Project: Climate change impacts on primary production dynamics in inner Danish waters July 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 1

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 2

Why? OX C I F E D N E G Y MAREN MOLTKE LYNGSGAARD Y C IEN Hansen & Manscher 2008 3 UNIVERSITY OF COPENHAGEN

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

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

This Ph. D project includes 2 leading questions: 1. 2. Temperature sensitivity of subsurface photosynthesis. 1. Measure primary production dynamics in total watercolumn and subsurface peaks 2. Estimate biological export Match-mismatch relationship between plankton groups. 1. 2. Identify phytoplankton spring bloom kick off Identify zooplankton kick off and a possible climate induced mismatch Phytoplankton Zooplankton Abundance Time of year MAREN MOLTKE LYNGSGAARD UNIVERSITY OF COPENHAGEN 6

What influences primary production in inner Danish waters? Time series analyses Do we see any climate related impact on primary production today? 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 Detection of phyto- and zooplankton kick off in spring time. MAREN MOLTKE LYNGSGAARD Field Work/ survey UNIVERSITY OF COPENHAGEN 7

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

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

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 10