 | Ph.D. Fellowship, "Effects of ocean acidification on calcification and incorporation of elements and isotopes in Mediterranean Pteropods and Foraminifers" |
A PhD fellowship to work on "Effects of ocean acidification on calcification and incorporation of elements and isotopes in Mediterranean Pteropods and Foraminifers" is available within the EU FP7 project "Mediterranean Sea Acidification in a changing climate" ("MedSea").
Ocean acidification affects not only the calcification potential of marine organisms but also the incorporation of (trace) element and isotope fractionation. Insights in the effects of ocean acidification on calcification are necessary to project possible consequences for aragonitic organisms such as pteropods and calcitic ones such as Foraminifers. They are key players in the food-webs and biogeochemical cycles. Furthermore, the elemental and isotopic composition of fossil shells are a valuable tool to reconstruct paleoclimates and investigating the impact of ocean acidification on shell geochemistry is invaluable for a better understanding of past ocean acidification events.
Responsibilities: The applicant will carry out laboratory-controlled experiments, manipulating the carbonate system as well as other environmental parameters, to investigate how ongoing ocean acidification is affecting the calcifying potential of Pteropods and Foraminifers and how ocean acidification interacts with other stressors. The following processes will be measured on live specimens: calcification, respiration, nutrition, excretion and life cycles. The effects on the carbonate polymorph and the ultra-structure will be investigated with Raman spectroscopy, SEM and AFM. Impacts on the elemental and isotope composition will be analysed using a laser ablation multi-collector ICP-MS.
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