Dr Julien Plancq
- ALKENoNE Research Associate (School of Geographical and Earth Sciences)
I am interested in the relationship between coccolithophores (haptophytes secreting calcium carbonate plates around their cell) and their environment, notably through paleoceanographic/paleoclimatic reconstructions. I thus use a multi-proxy / multi-disciplinary approach (micropaleontology, organic geochemistry, sedimentology, biostratigraphy, etc.) in Mesozoic and Cenozoic marine sediments. My studies aim to quantify nannofossil assemblages in order to better characterize the ecological preferences of these algae during the past and to understand the global evolutionary patterns that can be linked to environmental changes. In parallel, I use lipid biomarkers as paleoceanographic proxies. Lipid biomarkers can be used as indicators of the presence of an organism and metabolic processes (primary production), but they may also be used as proxies for environmental parameters (temperature, pH, pCO2, etc.).
In addition, I intend to better constrain the use of alkenones as paleoenvironmental proxies. My PhD work aimed to identify the marine coccolithophore species responsible for the production of alkenones during the Cenozoic, in order to better constrain the use of these long-chain unsaturated ketones in sea-surface temperature and pCO2 reconstructions. I am now studying alkenone composition and alkenone producers in Canadian lakes in order to develop a temperature calibration for paleoclimate reconstructions in continental settings.
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May-Jun. 2013: EAOG (European Association of Organic Geochemists) Travel Scholarship
Short postdoctoral stay at ICTA (Barcelona, Spain) - 2400€.
Nov. 2011: Travel Scholarship from the Federative Research Institute (IFR41) of the University of Lyon (France)
Laboratory visit (2 weeks) at the Department of Earth Sciences of Uppsala (Sweden) - 500€.
Jul. 2011: ECORD (European Consortium for Ocean Research Drilling) Scholarship
Urbino Summer School in Paleoclimatology (Italy) - 1200€.
Sep. 2010: Travel Scholarship from the French Ministry of Education and Research
Molecular Organic Biogeochemistry course (NIOZ, Texel, The Netherlands) - 500€.
Sep. 2009-Sep.2012: PhD Scholarship (3 years) from the French Ministry of Education and Research - 15600€/year.
Nov. 2015-Apr. 2016: Supervision of Natasha Kumar (L4 student, Glasgow).
Project: “Late Holocene palaeoenvironmental reconstruction on the eastern Red Sea coast (Saudi Arabia)”.
Co-supervision of Natasha Caven (L4 student, Glasgow).
Project: “Developing a proxy for Paleosalinity”.
Feb.-Apr. 2013: Co-supervision of Julie LATTAUD (1st year of Master’s degree).
Project: “Application of the Long-chain Diol Index in Pliocene sediments (Punta Piccola, Sicily)”.
Jan.-Feb. 2012: Co-supervision of Théophile GREBERT (3rd year of Bachelor’s degree).
Project: “Lipid biosignature in the sedimentary record of the Eocene-Oligocene transition”.
Jan. 2014-Feb. 2015: Tutorials in Global Tectonics (lectures, tutorials and practical classes) and paleontology/petrography (practical classes) for undergraduate students (2nd years of Bachelor’s degree).
Sep. 2012-Aug. 2013: Tutorials in cartography (practical classes and field trip) and mineralogy/petrography (lectures, practical classes and field trips) for undergraduate students (2nd and 3rd years of Bachelor’s degree).
Sep. 2007-Aug. 2012: Tutorials in geology, evolution and paleontology for undergraduate students (1st and 3rd years of Bachelor’s degree).