And so I travel back to rainy England with a scarred finger and an ever growing collection of samples in the freezer. I will be replaced by Denise who will work alongside Lisa, who has been here with me from the beginning and they will continue our investigations into the impact of ocean acidification on the Mediterranean nitrogen cycle.
We collect water from the mesocosms at 0400 , which is a fantastic time of the day despite what Martina and Walter say, and are making measurements of the rate of nitrogen fixation, nitrification and nitrate uptake. We also collect samples for the determination of the presence and activity of nifH, the gene responsible for nitrogen fixation, which will be analysed by our colleagues at the University of California Santa Cruz. In other areas of the world nitrogen fixation has been found to be stimulated at elevated levels of CO2, whereas nitrification has been inhibited and to our knowledge nitrate uptake has not been investigated directly. There is currently no information available for the impact of OA on these processes in the Mediterranean and so hopefully we can make a start in describing the impact of OA on the biogeochemistry of this area.
I would like to thank everybody here in Stareso for making this an exceptionally good two weeks, fieldwork is always the best part of this job, fieldwork in Corsica with the MedSeA crazy gang has been one of the best trips ever. I would like to thank the team from Villefranche who have performed a huge job in setting up of this experiment, each one of them has played a major part in the success of this project, but in particular my gratitude goes to my ambulance driver and medical translator – Samir.