Stein Ivar Johnsen

757 total citations
34 papers, 439 citations indexed

About

Stein Ivar Johnsen is a scholar working on Ecology, Nature and Landscape Conservation and Oceanography. According to data from OpenAlex, Stein Ivar Johnsen has authored 34 papers receiving a total of 439 indexed citations (citations by other indexed papers that have themselves been cited), including 20 papers in Ecology, 9 papers in Nature and Landscape Conservation and 5 papers in Oceanography. Recurrent topics in Stein Ivar Johnsen's work include Fish Ecology and Management Studies (9 papers), Crustacean biology and ecology (9 papers) and Environmental DNA in Biodiversity Studies (5 papers). Stein Ivar Johnsen is often cited by papers focused on Fish Ecology and Management Studies (9 papers), Crustacean biology and ecology (9 papers) and Environmental DNA in Biodiversity Studies (5 papers). Stein Ivar Johnsen collaborates with scholars based in Norway, Sweden and Finland. Stein Ivar Johnsen's co-authors include Trude Vrålstad, David Strand, Jon Museth, Lennart Edsman, Johannes C. Rusch, Steen Wilhelm Knudsen, Morten Kraabøl, Peter Rask Møller, Sune Agersnap and Trond Taugbøl and has published in prestigious journals such as Limnology and Oceanography, Journal of Applied Ecology and Hydrobiologia.

In The Last Decade

Stein Ivar Johnsen

30 papers receiving 414 citations

Peers

Stein Ivar Johnsen

ECOLO

GPC

NLC

OCEAN

Maroof Khalaf Jordan

Stephen P. McIninch United States

Gina M. Ralph United States

Chuck Hollingworth United Kingdom

Valentina Lauria Italy

Kilian Toledo‐Guedes Spain

N. Brent Hargreaves Canada

Edgar Tórres-Irineo Mexico

John T. Tanacredi United States

Grace O. Vaughan United Arab Emirates

Maroof Khalaf Jordan

Stein Ivar Johnsen

252 ×0.7

ECOLO

239 ×1.8

GPC

95 ×1.0

NLC

82 ×0.9

93 ×1.8

OCEAN

Citations per year, relative to Stein Ivar Johnsen Stein Ivar Johnsen (= 1×) peers Maroof Khalaf

Countries citing papers authored by Stein Ivar Johnsen

Since Specialization

Citations

This map shows the geographic impact of Stein Ivar Johnsen's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Stein Ivar Johnsen with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Stein Ivar Johnsen more than expected).

Fields of papers citing papers by Stein Ivar Johnsen

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Stein Ivar Johnsen. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Stein Ivar Johnsen. The network helps show where Stein Ivar Johnsen may publish in the future.

Co-authorship network of co-authors of Stein Ivar Johnsen

This figure shows the co-authorship network connecting the top 25 collaborators of Stein Ivar Johnsen. A scholar is included among the top collaborators of Stein Ivar Johnsen based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Stein Ivar Johnsen. Stein Ivar Johnsen is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Brabrand, Åge, Ingeborg Palm Helland, Stein Ivar Johnsen, et al.. (2026). Regional ecosystem responses to environmental drivers in cold‐water lakes evaluated using stable isotopes of salmonid fishes. Limnology and Oceanography. 71(2). 1–14. 1 indexed citations

Rusch, Johannes C., David Strand, Tom Andersen, et al.. (2022). Exploring the eDNA dynamics of the host-pathogen pair Pacifastacus leniusculus (Decapoda) and Aphanomyces astaci (Saprolegniales) under experimental conditions. NeoBiota. 79. 1–29. 1 indexed citations

Johnsen, Stein Ivar, et al.. (2021). Genetic Diversity of Hatchery-Bred Brown Trout (Salmo trutta) Compared with the Wild Population: Potential Effects of Stocking on the Indigenous Gene Pool of a Norwegian Reservoir. Diversity. 13(9). 414–414. 3 indexed citations

Johnsen, Stein Ivar, David Strand, Johannes C. Rusch, & Trude Vrålstad. (2020). Environmental DNA (eDNA) Monitoring of Noble Crayfish Astacus astacus in Lentic Environments Offers Reliable Presence-Absence Surveillance – But Fails to Predict Population Density. Frontiers in Environmental Science. 8. 21 indexed citations

Johnsen, Stein Ivar, et al.. (2019). Nasjonal overvåking av edelkreps og spredning av signalkreps. Presentasjon av overvåkingsdata og bestandsstatus. BIBSYS Brage (BIBSYS (Norway)). 1 indexed citations

Johnsen, Stein Ivar, et al.. (2019). Biocide Treatment of Invasive Signal Crayfish: Successes, Failures and Lessons Learned. Diversity. 11(3). 29–29. 22 indexed citations

Strand, David, Stein Ivar Johnsen, Johannes C. Rusch, et al.. (2019). Monitoring a Norwegian freshwater crayfish tragedy: eDNA snapshots of invasion, infection and extinction. Journal of Applied Ecology. 56(7). 1661–1673. 60 indexed citations

Musil, Jiří, et al.. (2019). Movement patterns of juvenile and adult noble crayfish (Astacus astacus) in a small stream, determined by radiotelemetry. Annales de Limnologie - International Journal of Limnology. 55. 19–19. 3 indexed citations

Musil, Jiří, et al.. (2018). Telemetry of co-occurring noble crayfish (Astacus astacus) and stone crayfish (Austropotamobius torrentium): diel changes in movement and local activity. Fundamental and Applied Limnology / Archiv für Hydrobiologie. 191(4). 339–352. 6 indexed citations

10.

Sandlund, Odd Terje, Antti P. Eloranta, Reidar Borgstrøm, et al.. (2016). The trophic niche of Arctic charr in large southern Scandinavian lakes is determined by fish community and lake morphometry. Hydrobiologia. 783(1). 117–130. 15 indexed citations

11.

Johnsen, Stein Ivar, Jon Museth, & John Gunnar Dokk. (2016). Kartlegging av viktige funksjonsområder for fisk i Gudbrandsdalslågen. Duo Research Archive (University of Oslo). 1 indexed citations

12.

Museth, Jon, et al.. (2011). Nedre Otta kraftverk. Utredning av konsekvenser for harr, ørret og bunndyr i influensområdet. BIBSYS Brage (BIBSYS (Norway)). 1 indexed citations

13.

Vrålstad, Trude, et al.. (2011). Potent infection reservoir of crayfish plague now permanently established in Norway. Diseases of Aquatic Organisms. 97(1). 75–83. 35 indexed citations

14.

Museth, Jon, et al.. (2011). Managing biodiversity of floodplains in relation to climate change. International Journal of Climate Change Strategies and Management. 3(4). 402–415. 6 indexed citations

15.

Hesthagen, Trygve, et al.. (2010). Effect of supplementary stocking of juvenile brown trout, Salmo trutta, on yield in a Norwegian mountain reservoir. Fisheries Management and Ecology. 17(2). 186–191. 4 indexed citations

16.

Kraabøl, Morten, Jon Museth, & Stein Ivar Johnsen. (2009). Fangsthistorikk og bestandsvurderinger av mjøsørret. Med hovedvekt på kultiveringen av hunderørret. BIBSYS Brage (BIBSYS (Norway)). 2 indexed citations

17.

Johnsen, Stein Ivar, et al.. (2008). Vandringssperre for signalkreps i Buåa, Eda kommun, Sverige. Overvåking av signalkreps og krepsepestsituasjonen. BIBSYS Brage (BIBSYS (Norway)). 3 indexed citations

18.

Museth, Jon, Stein Ivar Johnsen, & Morten Kraabøl. (2008). Ørretutsettinger i elver - en kunnskapsoppsummering med relevans for Glomma og Søndre Rena. BIBSYS Brage (BIBSYS (Norway)).

19.

Museth, Jon, Odd Terje Sandlund, Stein Ivar Johnsen, Sigurd Rognerud, & Randi Saksgård. (2008). Fiskesamfunnet i Storsjøen i Åmot og Rendalen kommuner. Betydningen av reguleringsinngrep, endret beskatning og avbøtende tiltak. BIBSYS Brage (BIBSYS (Norway)).

20.

Johnsen, Stein Ivar, Oddgeir Andersen, & Jon Museth. (2006). Introdusert signalkreps i Porsgrunn kommune, Telemark. Kartlegging og forslag til tiltak. BIBSYS Brage (BIBSYS (Norway)). 1 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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