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My research aims at understanding fluid-microbe interactions. I'm interested in the formation of organic molecules as a result of pyrolysis of microbial biomass (Archaeal and Bacterial) under various hydrothermal conditions using the Dickson-type flexible-cell high temperature-pressure reactors.

My work also includes understanding the formation and interactions of various organic compounds and nutrients in natural hydrothermal systems and their role on microbial metabolism. 

I am also interested in understanding the effects of fluid-rock interactions, magma degassing, sub-surface cooling and mixing of seawater on hydrothermal fluids using fluid geochemistry and thermodynamic modelling. I'm based at the  and the  . 

Expeditions:

2012 GS22 ► R/V GO Sars/ROV Ægir ►Arctic Mid-Oceanic ridge

2021  ► R/V Kronprins Haakon/ROV Aurora(REV Ocean) ►Gakkel Ridge: Aurora vent field

2019 GS19 ► R/V GO Sars/ROV Ægir ►Arctic Mid-Oceanic ridge: 73°N Vent Site

2019  ► R/V Polarstern/ROV Quest 4000m ► East Scotia ridge and South Sandwich island arc 

2018  ► R/V Meteor/MeBo-70 ► Gulf of Cadiz

Curriculum Vitae

• 08/2020-2023: PhD Research Fellow, University of Bergen.
• 10/2017-01/2020: MSc Marine Geosciences, University of Bremen, Germany.          Thesis: Geochemical investigations of hydrothermal fluids from the South Sandiwch island arc, Southern Ocean.
• 07/2014-07/2017: BSc Geology, St Xavier's College, University of Mumbai, India. 

• 2021

Expedition HACON21  

Article in Aftenposten () about NFR project HyPOD. 

• 2020

Expedition PS119 () blog post in Google Arts and Culture

PEER-REVIEWED PUBLICATIONS 

[4] Pereira, S.I., B. Emilsson, E.P. Reeves (2025) Trace analysis of volatile fatty acids in marine waters using modern high‐pressure ion chromatography. Limnology and Oceanography: Methods. DOI:

[3] Ramirez-Llodra, E., C. Argentino, M. Baker, A. Boetius, C. Costa, H. Dahle, E.M. Denny, P.-A. Dessandier, M.H. Eilertsen, B. Ferre, C.R. German, K. Hand, A. Hilário, L. Hislop, J.W. Jamieson, D. Kalnitchenko, A. Mall, G. Panieri, A. Purser, S.P. Ramalho, E.P. Reeves, L. Rolley, S.I. Pereira, P.A. Ribeiro, M.F. Sert, I.H. Steen, M. Stetzler, R. Stokke, L. Victorero, F. Vulcano, S. Vågenes, K.A. Waghorn, S. Buenz (2023) Hot vents beneath an icy ocean: The Aurora Vent Field, Gakkel Ridge, revealed. Oceanography, 36. DOI: 

[2] Kürzinger, V., Bach, W., Diehl, A., Pereira, S.I., Strauss, H. and Bohrmann, G., (2022). Sulfur formation associated with coexisting sulfide minerals in the Kemp Caldera hydrothermal system, Scotia Sea. Chemical Geology, p.120927. DOI: 

[1] Pereira, S.I., Diehl, A., McDermott, J.M., Pape, T., Klose, L., Strauss, H., Bohrmann, G. and Bach, W (2022). Geochemistry of hydrothermal fluids from the E2-segment of the East Scotia Ridge: Magmatic input, reaction zone processes, fluid mixing regimes and bioenergetic landscapes. Frontiers in Marine Science. DOI: 

#Past *Present

HACON (FRINATEK)^#

(PI/NIVA-REV OCEAN)

HyPOD (FRINATEK)^#

(PI/���ϳԹ���Դ),  (���ϳԹ���Դ),  (Uni. Bremen), (ICBM/MPI)

Sandwich Venting II (BMBF/ DFG)^#

(Uni Bremen), (Uni Bremen), (Uni Bremen)