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Département de Biologie /
Pavillon Alexandre-Vachon
1045, av. de la Médecine, local 2064
Université Laval
Québec (Québec) G1V 0A6
Phone : +1 418 656 2131 ext. 404880


Josephine Z. Rapp

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Josephine Z.
Postdoctoral Fellow
Microbe-virus interactions in the Last Ice Area

Phone : 418-656-2131

Research Interests

I am a polar microbial ecologist that uses 'omic techniques to study the diversity and function of the smallest inhabitants of the Arctic - microbes and their viruses. My overarching aim is to contribute to a better understanding of the key microbial players and mechanisms that drive ecosystem functioning in the cryosphere, knowledge needed to better predict the consequences of ongoing environmental changes for the future Arctic Ocean.


2014 - 2018
PhD in Marine Microbiology
Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Bremerhaven, Germany;
Diversity and function of microbial communities in the Arctic Ocean.

2014 - 2018
MarMic Graduate School for Marine Microbiology
Max Planck Institute for Marine Microbiology, Bremen, Germany.

2012 - 2014
M.Sc. in Marine Microbiology
International Max Planck Research School of Marine Microbiology and University of Bremen, Germany
Bacterial diversity in sea ice, melt ponds, water column, ice algal aggregates and deep-sea sediments of the Central Arctic Ocean.

2009 - 2012
B.Sc. in Biology
Free University of Berlin and Max Planck Institute for Marine Microbiology, Bremen, Germany
Bacterial diversity patterns in deep-sea sediments at the Arctic long-term observatory HAUSGARTEN.

Research Experience

Postdoctoral fellow (2021 - present)
CFREF Sentinel North project "Last Ice Microbiomes and Arctic Ecosystem Health"
Université Laval, Canada

Scientific consultant (2020)
Matt Sullivan's Virus lab
Ohio State University, USA

Postdoctoral fellow (2018 - 2020)
Jody Deming's group as part of the "Gene Flow" project; School of Oceanography
University of Washington, USA

Research stays (May-June - 2019)
Research stay at the Sullivan lab
Department of Microbiology, Ohio State University, USA.

Research stays (Sep-Oct - 2015)
Research stay at the Joint Genome Institute (JGI)
Walnut Creek, CA, USA.

Research stays (Aug-Oct - 2011)
Research stay at Department of Environmental Engineering
UNESP Sorocaba, São Paulo, Brazil.

Research stays (Sep-Oct 2010)
Research stay at Sven Lóven Centre for Marine Science
Tjärnö, Sweden.


2nd place “People's choice”
Centre for Northern Studies photo contest

Winner “Best presentation”
GRC on Polar Marine Science

Next Generation of Polar Researchers (NGPR-3) fellow, NSF funded
Catalina Island, USA

IGS Sea ice Symposium Early Career Researcher travel award ($1000 CAD)

2018 - 2019
Science Communication Fellow, NSF scholarship ($2,500)
Pacific Science Center, Seattle, USA.

Winner “Best oral presentation”
AWI PhD student symposium



Soltwedel, T., Rapp, J.Z., Hasemann, C. (2023). Impact of local iron enrichment on the small benthic biota in the deep Arctic Ocean. Front. Mar. Sci. 10:1118431. https://doi:10.3389/ fmars.2023.1118431


Cooper, Z.S., Rapp, J.Z., Shoemaker, A.M.D., Anderson, R.E., Zhong, Z. and Deming, J.W. (2022). Evolutionary divergence of Marinobacter strains in cryopeg brines as revealed by pangenomics. Front. Microbiol. 13:879116.

Culley, A.I., Thaler, M., Kochtitzky, W., Iqaluk, P., Rapp, J.Z., Rautio, M., Kumagai, M., Copland, L., Vincent, W. and Girard, C. (2022). The Thores Lake proglacial system: remnant stability in the rapidly changing Canadian High Arctic. Arctic Science. e-First

Labbé, M., Thaler, M., Pitot, T.M., Rapp, J.Z., Vincent, W. & Culley, A.I. (2022). Climate-endangered Arctic epishelf lake harbors viral assemblages with distinct genetic repertoires. Appl. Environ. Microbiol.


Rapp, J.Z., Sullivan, M.B. and Deming, J.W. (2021). Divergent genomic adaptations in the microbiomes of Arctic subzero sea-ice and cryopeg brines. Front. Microbiol. 12, 701186.

Fadeev, E., Cardozo-Mino, M.G., Rapp, J.Z., Bienhold, C., Salter, I., Salman-Carvalho, V., Molari, M., Tegetmeyer, H.E., Buttigieg, P.L. and Boetius, A. (2021). Comparison of two 16S rRNA primers (v3-v4 and v4-v5) for studies of Arctic microbial communities. Front. Microbiol. 12:637526


Zhong, Z., Rapp, J.Z., Wainaina, J.M., Solonenko, N.E., Maughan, H., Carpenter, S.D., Cooper, Z.S., Jang, H.B., Bolduc, B., Deming, J.W. and Sullivan, M.B. (2020). Viral ecogenomics of Arctic cryopeg brine and sea ice. mSystems 5.

Hoffmann, K., Bienhold, C., Buttigieg, P.L., Knittel, K., Laso-Pérez, R., Rapp, J.Z., Boetius, A and Offre, P. (2020). Diversity and metabolism of Woeseiales bacteria, global members of deep-sea sediment communities. ISME J. 14, 1042-1056.


Cooper, Z.S., Rapp, J.Z., Carpenter, S.D., Iwahana, G., Eicken, H. and Deming, J.W. (2019). Distinctive microbial communities in subzero hypersaline brines from Arctic coastal sea ice and rarely sampled cryopegs. FEMS Microbiol. Ecol.


Rapp, J.Z., Fernández-Méndez, M., Bienhold, C. and Boetius, A. (2018). Effects of ice-algal aggregate export on the connectivity of bacterial communities in the central Arctic Ocean. Front. Microbiol. 9:1035


Fernández-Méndez, M., Turk-Kubo, K.A., Rapp, J.Z., Buttigieg, P.L., Krumpen, T., Zehr, J.P., et al. (2016). Diazotroph diversity in the sea ice, melt ponds and surface waters of the Eurasian Basin of the Central Arctic Ocean. Front. Microbiol. 7:1884.

Yilmaz, P., Yarza, P., Rapp, J.Z. and Glöckner, F.O. (2016). Expanding the world of marine bacterial and archaeal clades. Front. Microbiol. 6:1524.


Boetius, A., Anesio, A.M., Deming, J.W., Mikucki, J. and Rapp, J.Z. (2015). Microbial ecology of the cryosphere: sea ice and glacial habitats. Nat. Rev. Microbiol. 13, 677-690.