Per Johannessen

685 total citations
23 papers, 550 citations indexed

About

Per Johannessen is a scholar working on Ecology, Oceanography and Global and Planetary Change. According to data from OpenAlex, Per Johannessen has authored 23 papers receiving a total of 550 indexed citations (citations by other indexed papers that have themselves been cited), including 12 papers in Ecology, 11 papers in Oceanography and 9 papers in Global and Planetary Change. Recurrent topics in Per Johannessen's work include Marine Biology and Ecology Research (10 papers), Marine Bivalve and Aquaculture Studies (6 papers) and Aquatic Invertebrate Ecology and Behavior (6 papers). Per Johannessen is often cited by papers focused on Marine Biology and Ecology Research (10 papers), Marine Bivalve and Aquaculture Studies (6 papers) and Aquatic Invertebrate Ecology and Behavior (6 papers). Per Johannessen collaborates with scholars based in Norway, Sweden and United Kingdom. Per Johannessen's co-authors include Arne Ervik, Pia Kupka Hansen, Jan Aure, Anders Stigebrandt, Tore Høisæter, Tina Kutti, Vibeke Andersen, Amund Maage, Thomas G. Dahlgren and Helena Wiklund and has published in prestigious journals such as Aquaculture, Marine Biology and Zoological Journal of the Linnean Society.

In The Last Decade

Per Johannessen

22 papers receiving 500 citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
Per Johannessen Norway 10 326 196 187 142 77 23 550
Sven Kollberg Sweden 8 525 1.6× 274 1.4× 243 1.3× 246 1.7× 74 1.0× 8 820
Chris J Cromey United Kingdom 11 673 2.1× 246 1.3× 221 1.2× 290 2.0× 96 1.2× 18 834
Renée Mercaldo‐Allen United States 14 180 0.6× 67 0.3× 151 0.8× 162 1.1× 108 1.4× 40 499
T. La Rosa Italy 6 304 0.9× 293 1.5× 257 1.4× 67 0.5× 21 0.3× 8 509
J. A. Mihursky United States 12 339 1.0× 248 1.3× 261 1.4× 86 0.6× 148 1.9× 18 566
Thomas D. Nickell United Kingdom 12 583 1.8× 278 1.4× 212 1.1× 221 1.6× 80 1.0× 13 728
Stephen F. Cross Canada 10 334 1.0× 83 0.4× 161 0.9× 210 1.5× 40 0.5× 16 520
Yeşim Büyükateş Türkiye 13 117 0.4× 253 1.3× 152 0.8× 54 0.4× 45 0.6× 36 479
L.J. Seiderer South Africa 9 198 0.6× 240 1.2× 197 1.1× 38 0.3× 42 0.5× 13 420
Tatiana M. Tsagaraki Greece 17 251 0.8× 394 2.0× 321 1.7× 81 0.6× 23 0.3× 31 667

Countries citing papers authored by Per Johannessen

Since Specialization
Citations

This map shows the geographic impact of Per Johannessen'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 Per Johannessen with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Per Johannessen more than expected).

Fields of papers citing papers by Per Johannessen

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Per Johannessen. 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 Per Johannessen. The network helps show where Per Johannessen may publish in the future.

Co-authorship network of co-authors of Per Johannessen

This figure shows the co-authorship network connecting the top 25 collaborators of Per Johannessen. A scholar is included among the top collaborators of Per Johannessen 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 Per Johannessen. Per Johannessen is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
2.
Wiklund, Helena, Adrian G. Glover, Per Johannessen, & Thomas G. Dahlgren. (2009). Cryptic speciation at organic-rich marine habitats: a new bacteriovore annelid from whale-fall and fish farms in the North-East Atlantic. Zoological Journal of the Linnean Society. 155(4). 774–785. 47 indexed citations
3.
Kutti, Tina, Pia Kupka Hansen, Arne Ervik, Tore Høisæter, & Per Johannessen. (2006). Effects of organic effluents from a salmon farm on a fjord system. II. Temporal and spatial patterns in infauna community composition. Aquaculture. 262(2-4). 355–366. 105 indexed citations
4.
Johannessen, Per, et al.. (2004). Marine biological environmental research at Norscrap near Hanoytangen on the west coast of Norway, Askoy county during 2004 Marinbiologisk miljoundersokelse ved Norscrap west AS pa Hanoytangen, Askoy Kommune I 2004. 4. 1–47. 1 indexed citations
5.
Johannessen, Per, et al.. (2002). Marine biological investigation of environmental conditions in Molde fjord, Selje county Marinbiologisk undersokelse av miljoforholdene i Moldefjorden, Selje kommune. 11. 1–24. 1 indexed citations
6.
Høisæter, Tore & Per Johannessen. (2001). Xylodiscula planata sp. nov., a “lower” heterobranch gastropod from Norwegian waters. Sarsia. 86(4-5). 325–332. 6 indexed citations
7.
Hansen, Pia Kupka, Arne Ervik, Morten Schaanning, et al.. (2001). Regulating the local environmental impact of intensive, marine fish farming. Aquaculture. 194(1-2). 75–92. 78 indexed citations
8.
9.
Andersen, Vibeke, Amund Maage, & Per Johannessen. (1996). Heavy Metals in Blue Mussels ( Mytilus edulis ) in the Bergen Harbor Area, Western Norway. Bulletin of Environmental Contamination and Toxicology. 57(4). 589–596. 47 indexed citations
10.
Levings, Colin D., Arne Ervik, Per Johannessen, & Jan Aure. (1995). Ecological Criteria Used to Help Site Fish Farms in Fjords. Estuaries. 18(1). 81–81. 14 indexed citations
11.
Lunestad, Bjørn Tore, et al.. (1991). Simultaneous occurrence of Vibrio salmonicida and antibiotic‐resistant bacteria in sediments at abandoned aquaculture sites. Journal of Fish Diseases. 14(6). 631–640. 49 indexed citations
12.
Blackstock, J., Per Johannessen, & T. H. Pearson. (1986). Use of a sensitive indicator species in the assessment of biological effects of sewage disposal in fjords near Bergen, Norway. Marine Biology. 93(2). 315–322. 8 indexed citations
13.
Ervik, Arne, Per Johannessen, & Jan Aure. (1985). Environmental effects of marine Norwegian fish farms. Duo Research Archive (University of Oslo). 10 indexed citations
14.
15.
Johannessen, Per, et al.. (1981). Holophryxus richardiKoehler (Isopoda) found in Herdlefjorden, Western Norway. Sarsia. 66(2). 163–164. 2 indexed citations
16.
Johannessen, Per & Berit R. Heimdal. (1979). Hydrography and hydro chemistry from March to July 1976 in Fauskangerpollen, western Norway. Sarsia. 64(3). 171–178. 2 indexed citations
17.
Vader, Wim & Per Johannessen. (1978). Notes on Norwegian marine Amphipoda 6.Menigratopsis svennilssoni(Lysianassidae), an amphipod new to the Norwegian fauna. Sarsia. 63(4). 335–336. 1 indexed citations
18.
Johannessen, Per. (1977). Ecological studies on the deep-water pelagic community of Korsfjorden, western Norway. Sarsia. 63(2). 85–91. 2 indexed citations
19.
Johannessen, Per, et al.. (1976). Devonia perrieri(Malard) (Bivalvia, Galeommatacea) found in Scandinavian waters. Sarsia. 60(1). 13–18. 3 indexed citations
20.
Johannessen, Per. (1976). A new species and a new record of calanoid copepods from western Norway. Sarsia. 60(1). 19–24. 3 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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