Organisation and staff

Sebastian Sobek

senior lecturer at Department of Ecology and Genetics, Limnology

+4618-471 2718
Visiting address:
Evolutionsbiologiskt centrum (EBC)
Norbyv. 18 D
75236 Uppsala
Postal address:
Norbyv. 18 D
75236 Uppsala

Short presentation

My research is about carbon cycling in aquatic systems, with special focus on the fate of natural organic matter, greenhouse gas emission, and carbon sequestration in sediments.

For a popular scienctific portait of my research, click here.

For more information on the research and current projects, continue reading below.




My courses


Inland waters, i.e. lakes, running waters and reservoirs, cover only a small fraction of the Earth’s surface, but are disproportionally active sites of carbon cycling. Many lakes receive sizeable loads of terrestrial carbon from the surrounding catchment, triggering intensive in-lake carbon processing: substantial mineralization of organic matter leads to high carbon dioxide and methane emissions from lakes to the atmosphere, and at the same time, OC sequestration in lake sediments constitutes a significant long-term carbon sink. 

We combine field measurements with lab experiments, ranging from processes-scale understanding of degradation and preservation in sediments to catchment-scale and global-scale assessments of aquatic carbon fluxes. A common denominator of all projects is to understand the interactions between biogeochemical cycling in aquatic systems and environmental change.

Current projects:

  • Carbon Cascades from Land to Ocean in the Anthropocene (EU ITN, 2015-2018, co-PI)
  • Pesquisador Visitante Especial (Special Guest Researcher; CNPq and CAPES, Brazil, 2015-2017)
  • Inland Water Ecosystems in the global carbon cycle – towards a mechanistic understanding (Knut och Alice Wallenberg Stiftelse, 2014-2019, co-PI)
  • Towards a new understanding of carbon cycling in freshwaters: Methane emission hot spots and carbon burial in tropical reservoirs (ERC Starting Grant, 2014-2018, PI)
  • In-situ measurement of gas exchange over lake sediments – a key to understanding a major greenhouse gas source in the boreal landscape (VR, 2012-2015, PI)
  • The color of water – interplay with climate, and effects on drinking water supply(Formas, 2010-2014, co-PI)


Current group members:

  • Simone Peter, Post-doc: Release of DOC from iron in anoxic sediments
  • Raquel Mendonça, Post-doc: OC burial in tropical reservoirs
  • Hannah Chmiel, PhD student: The impact of climate change on carbon storage and carbon cycling in boreal lake sediments. 
  • Jovana Kokic, PhD student: In-situ measurement of gas exchange over lake sediments – a key to understanding a major greenhouse gas source in the boreal landscape.
  • Anastasija Isidorova, PhD student: Organic carbon burial in tropical reservoirs.
  • Annika Linkhorst, PhD student: Metahne emission from tropical reservoirs. 
  • Co-advisor of PhD student Blaize Denfeld (under-ice dynamics of CO2) 




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