Stergios Zarkogiannis

Stergios Zarkogiannis

Royal Society - Newton International Fellow

I am interested in pelagic calcification and the last years I have been working with planktonic foraminifera. I was intrigued by the fact that the cause behind their shell weight shifts during climatic cycles remains a mystery and so I focused on mechanisms that may drive plankton shell mass variations. From studying sediment cores, I found evidence that changes in foraminifera calcification intensities may be a buoyancy regulating mechanism for optimum habitat maintenance during glacial/interglacial ocean density changes. During my Newton Fellowship in Oxford with Ros Rickaby I aim to test my hypothesis on modern shells from ocean basins of different density and extend this research to other planktonic groups.

Zarkogiannis S.D.; Disruption of the Atlantic Meridional Circulation during Deglacial Climates Inferred from Planktonic Foraminiferal Shell Weights. Journal of Marine Science and Engineering. 2021,  9, 519,  doi: 10.3390/jmse9050519


Zarkogiannis, S.D.; Kontakiotis, G.; Gkaniatsa, G.; Kuppili, V.S.C.; Marathe, S.; Wanelik, K.; Lianou, V.; Besiou, E.; Makri, P.; Antonarakou, A. An Improved Cleaning Protocol for Foraminiferal Calcite from Unconsolidated Core Sediments: HyPerCal—A New Practice for Micropaleontological and Paleoclimatic Proxies. Journal of Marine Science and Engineering 2020, 8, 998, doi: 10.3390/jmse8120998


Zarkogiannis, S.D.; Fernandez, V.; Greaves, M.; Mortyn, P.G.; Kontakiotis, G.; Antonarakou, A. X-ray tomographic data of planktonic foraminifera species Globigerina bulloides from the Eastern Tropical Atlantic across Termination II. Gigabyte 2020, 1, doi:10.46471/gigabyte.5.


Zarkogiannis, S.D.; Antonarakou, A.; Tripati, A.; Kontakiotis, G.; Mortyn, P.G.; Drinia, H.; Greaves, M. Influence of surface ocean density on planktonic foraminifera calcification. Scientific Reports 2019, 9, 533, doi: 10.1038/s41598-018-36935-7.