Angela Maria Oviedo

My role in MedSeA Stareso
In the Mediterranean Sea, phytoplankton is used to live in a high alkalinity and high saturation state for calcite, we worry about the potential local impacts of an increased pCO2 (that greatly changes these characteristics) on the carbonate pump and biological pump.
Therefore, my purpose during the mesocosm is to evaluate the effects of an increased seawater pCO2 on the pelagic ecosystem primary production (POC and DOC) and calcification, that is organic carbon production versus inorganic carbon production. We will incubate water samples to measure primary productivity and calcification in 24 hours period.
Also, I will take a closer look at the changes in the Coccolithophores assemblages (if any) during the experiment. Coccolithophores are calcifying phytoplankton that contribute to both: the carbonate pump and biological pump by fixing the inorganic and dissolved carbon in the seawater. Every second day I will be filtering water to collect the organisms and later check the samples under the microscope.
From time to time I will help Laure with writing the news in this blog!
My thoughts on the trip
I Think is going to be a little bit like being in a cruise, isolated from the rest of the world, immersed in science and sharing with other scientists… and I am really looking forward to live this once more!. Since so many parameters relating with carbon fixation and carbon fate within the pelagic ecosystem will be measured, I am also very eager to compare the data collected among us, for instance oxygen evolution, 13C, chlorophyll, etc. … and I also have to say, I am looking forward to swim and enjoy the location!.
More about my research
I am doing my Ph.D. looking at how changes in carbonate chemistry and phosphorus limitation can affect carbon fixation in coccolithophores from the Mediterranean Sea. I basically look at the response, in terms of productivity and calcification, under two different aproaches: 1. in culture experiemetns comparing western and eastern E. huxleyi strains, which allows me to focous on the physiology of the species and 2. under mesocosms, looking at the response of the entire coccolithophore assemblage. My work is being done at the Universität Autònoma de Barcelona (Spain), in a close collaboration with the AWI (Germany) and Patrizia Ziveri is always there to guide me.
Before, I did a Master thesis on the input of nutrients from the mangroves to the estuary in the Island of Java as part of a M.Sc. program at the University of Bremen. and long time ago 😉 I graduated as a Marine Biologist from the Universidad del Valle, in Colombia, where I was already working with algae and mangroves.

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