Project description
The goals of this project are to understand how phytoplankton in the polar regions responded to, and may have contributed to climate change between ca 30-40 million years ago. This information should help us understand how phytoplankton may behave, and influence climate in the near future, due to anthropogenic global warming. It is difficult to predict future plankton behavior solely from our historical knowledge of living plankton behavior or their biology, as the magnitude of future climate change far exceeds anything that occurred in the historical past, and will produce ocean conditions in polar regions that were last seen on earth only many millions of years ago.
A specific target of our study are the marine diatoms, a phytoplankton group that plays a key role in removing carbon dioxide from the earth's atmosphere. This group is known to have evolved rapidly and increased in abundance close to the time when the earth cooled and polar ice-sheets formed around 34 million years ago. We also will use biogeographic patterns in radiolarians, a zooplankton group common in polar regions, and with species distributions that closely track ocean water masses, to reconstruct changes in the extent of polar oceans. Several other fossil and geochemical measurements that indicate how intensely the oceans were capturing carbon will also be collected, and all data will be placed in context by developing computer simulations of ocean circulation, plankton productivity and carbon capture. A last, but very important goal is to at least indirectly estimate the risk that several modern, cold water adapted diatom species that are disporportionately responsible for carbon capture might actually go extinct due to the loss of suitable cold-water habitats in future warmer oceans. We will examine the response of past diatom species to major climate change to estimate how much environmental change is tolerated before species actually become extinct.
The project work will be led by Gayane Asatryan (also lead work on radiolarians), with David Lazarus as senior advisor, and Johan Renaudie, with lead responsibility for the diatom and ocean modelling modules. Two doctoral students will also work on these themes. The project is funded via the 'Make Our Planet Great Again' (MOPGA) special program of the DAAD and runs from August 2018 to December 2022.
Project collaborators
- Prof. Dr. Ulrich Struck, Museum für Naturkunde: geochemistry (isotopes).
- Dr. Jeremy Young, University College London: calcareous nannofossils.
- Dr. Jessica Stammeier, GFZ Potsdam
- Dr. Jakub Witkowski, University of Szczeczin.
Project updates
| 2024-01-03 | Publication: New MOPGA-related preprint on EGUsphere! |
| 2023-07-25 | Publication: New MOPGA-related preprint on EGUsphere! |
| 2021-11-23 | Conference: Gayane presented our preliminary results at the MOPGA scientific mid-term conference in Strasbourg, France. |
| 2021-10-12 | Visit: Volkan visited Jakub Witkowski at the University of Szczeczin, Poland, to work together on diatom taxonomy. |
| 2021-09-20 | Conference: Two talks from our group at the online GeoKarlsruhe conference. |
| 2021-09-06 | Conference: One standard and two lightning talks from our group at the online Crossing the Paleontological-Ecological Gap symposium. |
| 2020-05-04 | Conference: Displays (1 and 2) at EGU Share Geosciences online on the prelimimary results. |
| 2019-11-29 | Public outreach event: Gabrielle Rodrigues de Faria and Johan Renaudie will be answering public questions about our project, as guests of a 'Fridays for Future'-related Museum Salon . |
| 2019-11-06 | Public lecture: "Antarktisches Mikroplankton und vergangene Klimawandel" by Johan Renaudie at the Museum für Naturkunde Magdeburg. |
| 2019-08-31 | Public outreach event: "The ocean’s plankton and climate change; how to see the future from the bottom of the ocean" booth at the MfN during the Lange Nacht der Museen. |
| 2019-06-15 | Public outreach event: "The ocean’s plankton and climate change; how to see the future from the bottom of the ocean" booth at the MfN during the Lange Nacht der Wissenschaften. |
| 2019-05-01 | Two PhD students were hired to work on the project. One, Gabrielle Rodrigues de Faria, will take the lead on the carbonate geochemistry, and the other, Volkan Özen, will work on diatom diversity. |
| 2018-10-01 | While waiting for our first results, feel free to read the project's proposal! |
Project outputs
Publications
Renaudie J., Lazarus D. 2024 Cenozoic pelagic accumulation rates and biased sampling of the deep sea record. Egusphere [preprint].
Rodrigues de Faria G., Lazarus D., Renaudie J., Stammeier J., Özen V., Struck U. 2023 Late Eocene to early Oligocene productivity events in the proto-Southern Ocean as drivers of global cooling and Antarctica glaciation, EGUsphere [preprint]
Asatryan G., Lazarus D., Harbott M., Todorovic S., Kaplan J. O., Lee C. E., Parmesan C., Renaudie J., Thomas H., Wu H., Richards C. L. 2022. How do plants, animals and microbes interact and respond to climate change? Frontiers for Young Minds.
Trubovitz, S., Lazarus, D., Renaudie, J. and Noble, P. J., 2020. Marine plankton show threshold extinction response to Neogene climate change. Nature Communications, 11:5069.
Talks
Özen V., Rodrigues de Faria G., Renaudie J., Lazarus D., 2022. Marine diatoms' evolutionary respone to Eocene-Oligocene climatic events. CBEP12, Bremen, Germany.
Özen V., Rodrigues de Faria G., Renaudie J., Lazarus D., Asatryan G., 2022. Diatom diversity and paleoproductivity history across the Eocene-Oligocene Transition. TMS Silicofossil and Palynology Joint Meeting, Newcastle, UK.
Rodrigues de Faria G., Özen V., Lazarus D., Struck U., Renaudie J., Asatryan G., 2021. Biological Productivity in the Southern Ocean across the Eocene-Oligocene transition. GeoKarlsruhe, Online.
Asatryan G., Özen V., Rodrigues de Faria G., Lazarus D., Renaudie J., 2021. Paleogene polar plankton and paleoproductivity: new proxy data from the Eocene-Oligocene transition. GeoKarlsruhe, Online.
Renaudie J., Özen V., Rodrigues de Faria G., Trubovitz S., Lazarus, D.B., 2021. Climatic range of modern fossilizable phytoplankton. Crossing the Paleontological-Ecological Gap symposium, Online.
Hunter J., Özen V., Rodrigues de Faria G., Renaudie J., Lazarus D., 2021. Southern Ocean Diatom Size Dynamics and the end-Eocene Paleoproductivity. Crossing the Paleontological-Ecological Gap symposium, Online.
Özen V., Rodrigues de Faria G., Renaudie J., Lazarus D., 2021. Evolutionary dynamics of the Southern Ocean diatoms across the Eocene-Oligocene transition. Crossing the Paleontological-Ecological Gap symposium, Online.
Lazarus, D., Renaudie, J., Asatryan, G., 2019. Diversity dynamics and climate change in Cenozoic marine siliceous plankton. NAPC 2019, Riverside, California, USA.
Displays
Renaudie J., Lazarus D., Trubovitz S., Özen V., Rodrigues de Faria G., Asatryan G., Noble P., 2020. Cenozoic plankton diversity dynamics and the impact of macroevolution on the marine carbon cycle. EGU Share Geosciences Online.
Rodrigues de Faria G., Lazarus D., Struck U., Asatryan G., Renaudie J., Özen V., 2020. Paleogene Polar Plankton and export productivity changes between the Eocene and Oligocene. EGU Share Geosciences Online.
Posters
Rodrigues de Faria G., Özen V. Struck U., Stammeier J., Renaudie J., Lazarus D., 2022. Late Eocene export productivity event in the Southern Ocean. ICP14, Bergen, Norway.
Asatryan G., Renaudie J., Lazarus D., 2022. New studies of Eocene-Oligocene Southern Ocean radiolaria. CBEP12, Bremen, Germany.
Özen V., Rodrigues de Faria G., Renaudie J., Lazarus D.B., 2020. Southern Ocean diatom diversity across the Eocene-Oligocene transition. The Micropalaeontological Society 50th Anniversary Conference 2020, Online.
Rodrigues de Faria G., Renaudie J., Struck U., Lazarus D.B., 2020. Southern Ocean productivity across the Eocene-Oligocene boundary. The Micropalaeontological Society 50th Anniversary Conference 2020, Online.
Özen V., Rodrigues de Faria G., Asatryan G., Renaudie J., Lazarus D.B., 2019. Investigating the role of Southern Ocean phytoplankton in the end Eocene climatic events. Paläontologische Gesellschaft 90. Jahrestagung, Munich, Germany.
Asatryan, G., Lazarus, D., Renaudie, J., 2019. The preliminary studies of plankton in the framework of the project "Paleogene Polar Plankton and Paleoproductivity". EGU General Assembly 2019, Vienna, Austria.
Asatryan, G., Lazarus, D., Renaudie, J., 2018. Paleogene polar phytoplankton and oceanic carbon sequestration. TMS Annual Conference, Leeds, UK.