Author

Hallvard Strøm

Norwegian Polar InstituteORCID 0000-0002-4823-0409Unclaimed ORCID profile · follow to get notified of new preprints

Biology Disciplines

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Research Focus:ecology & biodiversity· 3 Research Focus:host-pathogen & immune response· 3 Approach:experimental assay· 2 Approach:statistical model· 2 Research Focus:benchmarking· 1 Research Focus:clustering· 1 Research Focus:differential expression· 1 Research Focus:gene regulatory network inference· 1

Frequent Co-Authors

Sébastien DescampsiD· 3 shared Jóhannis DanielseniD· 2 shared Kjell Einar ErikstadiD· 2 shared Signe Christensen‐DalsgaardiD· 2 shared Svein‐Håkon LorentseniD· 2 shared Tycho Anker‐NilsseniD· 2 shared A. Palsdottir· 1 shared A. Purdie· 1 shared

Activity by Year

2021-2026 · peak 3/yr

Co-Author Collaboration Network

10 top collaborators · 33 mutual co-author links

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Focal author (center)Selected co-authorORCID co-authorUnlinked name

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3 shared papersMicrobiology

Sébastien DescampsORCID

Mutual co-authors in cluster

Author profile →

4 papers

Recent·Most cited

Multiple Introductions of Highly Pathogenic Avian Influenza Viruses into the High Arctic: Svalbard and Jan Mayen, 2022 - 2025

Silje Granstad, Ragnhild Tønnessen, Bjørnar Ytrehus, Sébastien Descamps, Børge Moe, Hallvard Strøm, Geir Wing Gabrielsen, Sveinn Are Hanssen, Egil Rønning, Ole-Herman Tronerud, Maarten J. J. E. Loonen, Britt Gjerset, Hans Kristian Mjelde, Knut Madslien, Johan Åkerstedt, Cathrine Arnason Bøe

This study tracks the introduction and spread of HPAIVs in the High Arctic, identifying multiple genotypes and suggesting repeated introductions and local viral amplification.

Journal of General Virology · Aug 17, 2026Peer-reviewedMicrobiology

Time-lagged causal inference corroborates presumed drivers of North Atlantic seabird ecology

Duncan A. O’Brien, Kate Layton‐Matthews, Pol Capdevila, Hannah S. Wauchope, Annette L. Fayet, Tycho Anker‐Nilssen, Manuel Ballesteros, Ingar S. Bringsvor, Signe Christensen‐Dalsgaard, Nina Dehnhard, Sébastien Descamps, Kjell Einar Erikstad, Kevin Hodges, Svein‐Håkon Lorentsen, Tone Kristin Reiertsen, , Christopher F. Clements

The paper uses time-lagged causal inference to show climate and anthropogenic factors reduce seabird breeding success and population size, with delayed recruitment effects contributing to declines.

bioRxiv · Jul 31, 2026 · PreprintEcology

AN UPDATED POPULATION ESTIMATE FOR NORTHERN GANNETS ACROSS THEIR NORTH-EAST ATLANTIC BREEDING RANGE FOLLOWING THE 2022 OUTBREAK OF HIGH PATHOGENICITY AVIAN INFLUENZA

L. Quinn, Jana W. E. Jeglinski, Svenja N.V. Auhage, Dawn E. Balmer, I. Støyle Bringsvor, E. Burton, Johan H Funder Castenschiold, Signe Christensen‐Dalsgaard, Jóhannis Danielsen, Jochen Dierschke, А.В. Ежов, Gudmundsson G. A., Tom Hart, Mark John Jessopp, R. Jones, , S. Wanless

This study updates the population estimate for northern gannets in the North-East Atlantic after a 2022 HPAI outbreak, showing a 17% decline in occupied sites.

bioRxiv · Apr 28, 2026 · PreprintEcology

Complex population structure of the Atlantic puffin revealed by whole genome analyses

Oliver Kersten, Bastiaan Star, Deborah M. Leigh, Tycho Anker‐Nilssen, Hallvard Strøm, Jóhannis Danielsen, Sébastien Descamps, Kjell Einar Erikstad, Michelle G. Fitzsimmons, Jérôme Fort, Erpur Snær Hansen, Mike Harris, Martin Irestedt, Oddmund Kleven, Mark L. Mallory, , Sanne Boessenkool

This study uses whole genome analyses of Atlantic puffins to reveal complex population structure, identifying four genetically distinct clusters and a secondary contact zone, challenging current taxonomy.

Communications Biology · Jul 29, 2021Peer-reviewedGenomics