Research output per year
Research output per year
Research activity per year
My research interests lie in the field of marine biogeochemistry, with a focus on element cycling in coastal systems, biogeochemical responses to anthropogenic pressures, and, particularly, benthic nitrogen turnover. Excess availability of land-derived nitrogen in coastal waters has led to coastal eutrophication all around the world, including the Baltic Sea; at the same time, element turnover processes in the coastal zone can temporarily retain and permanently remove nitrogen, thereby mitigating its transport to open waters. Understanding nitrogen turnover in the coastal habitat is thus imperative for understanding its fate in the wider marine system.
Research projects:
Check in with the microbes: using metagenomics and metatranscriptomics to comprehend seasonal organic carbon limitation of coastal benthic denitrification (PostDoc: Walter and Andrée de Nottbeck Foundation, CoastClim project, 2022)
Elucidating seasonal substrate limitation of benthic nitrate reduction in the coastal Baltic Sea (PostDoc: Walter and Andrée de Nottbeck Foundation, 2020-2021)
Biogeochemical links between eutrophication and climate change in the Baltic Sea (PhD student: Academy of Finland, 2013-2018)
BONUS COCOA - Nutrient cocktail in coastal zones of the Baltic Sea (PhD student: funded jointly by the EU and the Academy of Finland, 2014-2017).
Since 2020. Post-doctoral researcher (University of Helsinki).
2014-2019. PhD in Aquatic Sciences (University of Helsinki).
2012-2014. Research Associate in Biological Oceanography (GEOMAR Helmholtz Centre for Ocean Research, Kiel).
2009-2012. MSc in Biological Oceanography (GEOMAR Helmholtz Centre for Ocean Research, University of Kiel).
2006-2009. BSc in Environmental Sciences (Institute for Chemistry and Biology of the Marine Environment, University of Oldenburg).
Research output: Contribution to journal › Article › Scientific › peer-review
Research output: Contribution to journal › Review Article › peer-review
Research output: Thesis › Doctoral Thesis › Collection of Articles
Research output: Contribution to journal › Article › Scientific › peer-review
Research output: Contribution to journal › Article › Scientific › peer-review
Hellemann, D. (Project manager) & Eronen-Rasimus, E. (CoIlaborator)
01/01/2022 → 31/08/2022
Project: Research project
Hellemann, D. (Principal Investigator), Aalto, S. L. (CoIlaborator), Asmala, E. (CoIlaborator), Kiljunen, M. (CoIlaborator), Koch, B. (CoIlaborator), Norkko, A. (CoIlaborator) & Norkko, J. (CoIlaborator)
01/01/2020 → 31/12/2021
Project: Research project
Norkko, A. (Project manager), Hietanen, S. (Principal Investigator), Hellemann, D. (Participant), Tallberg, P. (Participant) & Savela, M. (Participant)
01/01/2014 → 31/12/2017
Project: Research project
Hietanen, S. (Project manager), Hellemann, D. (Participant), Tallberg, P. (Participant), Savela, M. (Participant), Jilbert, T. (Participant), Jakobs, G. (Project manager) & Myllykangas, J. (Participant)
01/09/2013 → 31/08/2018
Project: Research project
Hellemann, D. (Speaker: Presenter)
Activity: Participating in or organising an event types › Public Talks
Hellemann, D. (Speaker: Presenter)
Activity: Participating in or organising an event types › Public Talks
Hellemann, D. (Teacher)
Activity: Other activity types › Types for other activities - Other
Hellemann, D. (Speaker: Presenter)
Activity: Participating in or organising an event types › Public Talks
Hellemann, D. (Participant)
Activity: Other activity types › Types for other activities - Other