MedSeA Stareso mesocosm experiment will take place from June 4th to July 22nd at the STARESO marine station that is located near Calvi (North West of Corsica) in a wild area. During this period nine mesocosms will be deployed just in front of the marine station.
A mesocosm is like a strong plastic bag which can be filled with the surrounding water and closed at the bottom. We will therefore enclose 50,000 liters of seawater and all the microorganisms that are living at the time of the experiment in the Bay of Calvi. Then we will be able to study how the plankton communities (phytoplankton, bacteria, viruses), nutrients and other chemical products will respond to future ocean acidification. When all the bags (mesocosms) will be closed, Carbon Dioxide (CO2) level will be increase simulating future levels of CO2. To do so, in three mesocosms, CO2 concentrations with present values (~400 ppm) will be maintained and will be used as controls. The six other mesocosms will receive some CO2 saturated seawater in order to reach different CO2 values as expected for the next century.