Sebastian Haas

 PhD Oceanography Student


email: s.haas@dal.ca
campus location: SOSB Rm. 2-36

Educational Background

  • BSc Biology, University of Bayreuth
  • MSc Marine Microbiology, International Max Planck Research School of Marine Microbiology (MarMic), Max-Planck Institute Bremen & University of Bremen

Research Interests

  • Aquatic biogeochemistry
  • Nitrogen stable isotopes
  • Anoxygenic photosynthesis
  • Geomicrobiology


Haas, S., Desai, D. K., LaRoche, J., Pawlowicz, R., & Wallace, D. W. (2019). Geomicrobiology of the carbon, nitrogen and sulphur cycles in Powell Lake: a permanently stratified water column containing ancient seawater. Environmental Microbiology 21(10): 3927-3952

Haas S., de Beer D., Klatt J. M., Fink A., McCauley Rench R., Hamilton T. L., Meyer, V., Kakuk, B., Macalady, J. L. (2018). Low-light Anoxygenic Photosynthesis and Fe-S-Biogeochemistry in a Microbial Mat. Frontiers in Microbiology 9: 858.

Klatt J. M., Haas S., Yilmaz P., de Beer D., Polerecky L. (2015). Hydrogen sulfide can inhibit and enhance oxygenic photosynthesis in a cyanobacterium from sulfidic springs. Environmental Microbiology 17: 3301–3313.


  • Haas, S., LaRoche, J., Desai, D.K., Wallace, D.: Evidence for unusual nitrogen cycling in a long-term stratified lake from combined molecular and stable isotope approaches. ASLO Aquatic Sciences Meeting 2019. San Juan, USA.
  • Haas, S., LaRoche, J., Desai, D.K., Wallace, D.: Geomicrobiology of a Meromictic Lake Water Column Containing Relict Seawater. Goldschmidt Conference 2018. Boston, USA.
  • Haas, S., Kalvelage, T., Normandeau, C., LaRoche, J., Wallace, D. (2017): A High-Frequency Time Series of Inorganic Nitrogen Speciation and Isotopic Composition in a Eutrophic Coastal Basin: Insights into Nitrification. Presented at ASLO Aquatic Sciences Meeting 2017. Honolulu, USA. 
  • Haas, S., Wallace, D. (2017): Nitrogen Isotope Biogeochemistry in the Water Column of a Permanently Stratified Lake Containing Relict Seawater. Presented at: 1st Geobiology Society Conference, 2017; Banff, Canada. 


Awards & Scholarships

  • Kathy Ellis Memorial Book Prize (2015 - 2016)
  • Killam Predoctoral Scholarship
  • President's Award
  • Nova Scotia Graduate Scholarship