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Surya Eldo Virma Roza

Doctoral Students

Group:	Micropaleontology - Paleoceanography
Phone:	+49 421218659 63
Email:	[Bitte aktivieren Sie Javascript]
Room:	MARUM II, 1050

Scientific Interest

• Marine Palynology
• Micropaleontology
• Paleobiology
• Ecology
• Paleoceanography

Curriculum Vitae

since 2020	MARUM - Uni­versität Bre­men, Ger­many Ph.D. stu­dent - Mi­cro­pa­le­on­tolgy (Div. Mar­ine Pa­lyn­o­logy)
2017 -2019	Lud­wig-Max­imili­ans-Uni­versität München, Ger­many Mas­ter of Sci­ence in Geo- and Pa­leo­bi­o­logy
2011 -2015	Uni­versitas Pad­jadjaran, Bandung - In­done­sia Bach­elor of Sci­ence in Geo­logy

Thesis Committee:

• Prof. Dr. Karin Zonneveld
• Dr. Karl-Heinz Baumann
• Prof. Dr. Gesine Mollenhauer
• Dr. Marina Rillo
• Dr. Gerard Versteegh

Project

Inter-annual variability of the upwelling system off Cap Blanc studied from 18 years time series export flux of dinoflagellate cyst

The upwelling system off Cap Blanc forms one of the most productive region in the world. Permanent upwelling bearing nutrient rich water and mineral dust input from Sahara fertilize this coastal area as such, it becomes a key area in the global carbon cycle. In the scope of current global climate change, it is crucial to obtain insight into the effects of this change on the Cap Blanc ecosystem. This can be achieved by monitoring the production and association composition of key organisms of this ecosystem representing different trophic levels.

Dinoflagellates as marine planktonic organisms are a useful tool to study the dynamic of upwelling system off Cap Blanc because they consist of both photo- and heterotrophic organisms. Here we studied the export production of dinoflagellate cysts over an 18 years period by analyzing materials collected by a sediment trap located under the upwelling filament track of the major Cap Blanc upwelling cell at a depth ~1300m.

Conferences

Title	Co-author	Conference	Location & Date
Time series analysis of the cyst production of toxic dinoflagellates in the Cape Blanc upwelling region, NW Africa between 2003 and 2020	Runa Reuter, Gerard Versteegh, and Karin Zonneveld	20th International Conference on Harmful Algae	Hiroshima City, Japan; 5 - 11November 2023
Environmental factors influencing the dinoflagellate cysts production and their preservation in the bottom sediment in the upwelling region off Cape Blanc, Mauritania: a comparison of sediment trap with down-core sediment cyst record	Gerard J. M. Versteegh, Karin A. F. Zonneveld, Hendrik Wolschke, Iria García-Moreiras, Fangzhu Wu, and Gunner Gerdts	International Conference for Young Marine Researcher 2023	ICBM Oldenburg, Germany; 22 - 23 September 2023
Particulate organic matter export flux and ecosystem change in the Cape Blanc upwelling region during the last 18 years reflected by dinoflagellate cysts: a sediment trap study	Gerard J. M. Versteegh, Gerhard Fischer, and Karin A. F. Zonneveld	Ocean Floor Symposium "Understanding element fluxes - processes and budgets"	Marum Bremen, Germany; 9 - 12 October 2022
Seasonal, annual, and multi-annual variability of dinoflagellate cyst export production in the upwelling area off Cap Blanc based on 18 years sediment trap time series - Oral Presentaion	Gerard J. M. Versteegh, Karin A. F. Zonneveld	12th International Conference on Modern and Fossil Dinoflagellates	Las Palmas De Gran Canaria, Spain; 4 - 8 July 2022
18 years of dinoflagellate cyst export flux deposition recovered from a sediment trap in the upwelling region off Cape Blanc (NW Africa) - Poster	Gerard J. M. Versteegh, Karin A. F. Zonneveld	2nd Status Conference Research Vessels 2022	ICBM Oldenburg, Germany (online); 22 - 23 February 2022
Paleoecology of the Late Triassic marine biota from the Cassian Formation - Oral Presentation	Alexander Nützel	"Paleo & Life" 90th Annual Meeting of the Paleontological Society	LMU Munich, Germany; 15 - 19 September 2019
Biostratigraphy correlation of Jatiluhur, Kalapanunggal, and Subang Formations in northern part of Bogor Through - Oral Presentation	Lia Jurnaliah, Abdurrokhim	GEOSEA XIV Congress and 45th IAGI Annual Convention 2016 (GIC 2016)	Bandung, Indonesia; 10 - 13 October 2016

Field courses and Expedition

Nov - Dec 2021	Research cruise to Mauritania upwelling region R.V. Maria S. Merian
July 2018	Geology field work in the Posidonia Shale, Germany
June 2018	Paleontology field work in the Alpine's Dolomite, Italy
June 2015	Geology field work in the Subduction Complex of Central Java, Indonesia
2014 - 2015	Surface geological mapping in West Java, indonesia

Publications

Paper

• Roza, S. E. V., Versteegh, G. J. M., Pospelova, V., & Zonneveld, K. A. F. (2024) Environmental control of interannual and seasonal variability in dinoflagellate cyst export flux over 18 years in the Cape Blanc upwelling region (Mauritania). Frontiers in Marine Science. doi: 10.3389/fmars.2024.1284425
  

Metadata

• Roza, S. E. V., Zonneveld, K. A. F., & Pospelova, V. (2024) An 18-year sediment trap data: Original counting of organic-walled dinoflagellate cysts off Cape Blanc, Mauritania. PANGAEA. doi.pangaea.de/10.1594/PANGAEA.963113

Conference papers

• Roza, S. E. V., Versteegh, G. J. M., & Zonneveld, K. A. F. (2022) New ecological insight of calcareous dinoflagellate cysts export production based on an 18 years sediment trap study in the Cap Blanc upwelling area (NW, Africa). 12^th International Conference on Modern and Fossil Dinoflagellates.
• Roza, S. E. V., Versteegh, G. J. M., & Zonneveld, K. A. F. (2022) Seasonal, annual, and multi-annual variability of dinoflagellate cyst export production in the upwelling area off Cap Blanc based on an 18 years sediment trap time series. 12^th International Conference on Modern and Fossil Dinoflagellates.
• Roza, S. E. V., Juarnaliah, L., & Abdurokhim (2016) Biostratigraphy correlation of Jatiluhur, Kalapanunggal, and Subang Formations in the northern part of Bogor Through. Proceedings of GEOSEA XIV Congress and 45^th IAGI Annual Convention 2016 (GIC 2016)