Helmut Käfer

471 total citations
25 papers, 351 citations indexed

About

Helmut Käfer is a scholar working on Genetics, Ecology, Evolution, Behavior and Systematics and Ecology. According to data from OpenAlex, Helmut Käfer has authored 25 papers receiving a total of 351 indexed citations (citations by other indexed papers that have themselves been cited), including 24 papers in Genetics, 14 papers in Ecology, Evolution, Behavior and Systematics and 11 papers in Ecology. Recurrent topics in Helmut Käfer's work include Insect and Arachnid Ecology and Behavior (24 papers), Plant and animal studies (12 papers) and Physiological and biochemical adaptations (10 papers). Helmut Käfer is often cited by papers focused on Insect and Arachnid Ecology and Behavior (24 papers), Plant and animal studies (12 papers) and Physiological and biochemical adaptations (10 papers). Helmut Käfer collaborates with scholars based in Austria, Italy and Denmark. Helmut Käfer's co-authors include Anton Stabentheiner, Helmut Kovac, Cecília Costa, Iacopo Petrocelli, Monika Mandl, Stefan K. Hetz, Barbara Oswald, Arne K. D. Schmidt, Andrea Battisti and Stefano Turillazzi and has published in prestigious journals such as Scientific Reports, Thermochimica Acta and Journal of Comparative Physiology A.

In The Last Decade

Helmut Käfer

24 papers receiving 343 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Helmut Käfer Austria 11 305 226 201 101 80 25 351
Iacopo Petrocelli Italy 14 333 1.1× 292 1.3× 234 1.2× 40 0.4× 46 0.6× 27 404
Thomas G. Shelton United States 13 325 1.1× 258 1.1× 243 1.2× 48 0.5× 43 0.5× 31 368
Arián Avalos United States 12 303 1.0× 279 1.2× 189 0.9× 29 0.3× 42 0.5× 25 410
Lenka Sentenská Czechia 12 232 0.8× 204 0.9× 118 0.6× 70 0.7× 39 0.5× 24 381
Е. B. Lopatina Russia 12 221 0.7× 207 0.9× 201 1.0× 188 1.9× 47 0.6× 39 380
Lisa Filippi Japan 12 182 0.6× 239 1.1× 141 0.7× 49 0.5× 46 0.6× 25 296
V. E. Kipyatkov Russia 13 288 0.9× 278 1.2× 193 1.0× 194 1.9× 62 0.8× 29 454
Katy Frederick United States 8 338 1.1× 250 1.1× 286 1.4× 33 0.3× 82 1.0× 8 430
Bhawna Kalra India 12 200 0.7× 153 0.7× 127 0.6× 198 2.0× 172 2.1× 17 374
Arun Rajamohan United States 11 162 0.5× 142 0.6× 200 1.0× 120 1.2× 55 0.7× 33 343

Countries citing papers authored by Helmut Käfer

Since Specialization
Citations

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

Fields of papers citing papers by Helmut Käfer

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Helmut Käfer

This figure shows the co-authorship network connecting the top 25 collaborators of Helmut Käfer. A scholar is included among the top collaborators of Helmut Käfer 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 Helmut Käfer. Helmut Käfer 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.
Kovac, Helmut, et al.. (2025). Respiratory metabolism and energetics of Polistes paper wasp larvae and pupae from differing climates. Insectes Sociaux. 73(1). 145–156. 1 indexed citations
2.
Kovac, Helmut, et al.. (2025). The effect of heat stress on paper wasps from different climates. Journal of Thermal Biology. 132. 104188–104188. 2 indexed citations
3.
Käfer, Helmut, et al.. (2025). Critical thermal maxima of Polistes life stages from different climates, with a critical evaluation of methods. Journal of Thermal Biology. 129. 104111–104111. 3 indexed citations
4.
Kovac, Helmut, et al.. (2024). The heat shock response in Polistes spp. brood from differing climates following heat stress. Journal of Insect Physiology. 156. 104667–104667. 3 indexed citations
5.
Kovac, Helmut, et al.. (2023). The Impact of Climate on the Energetics of Overwintering Paper Wasp Gynes (Polistes dominula and Polistes gallicus). Insects. 14(11). 849–849. 3 indexed citations
6.
Käfer, Helmut, Helmut Kovac, & Anton Stabentheiner. (2023). Habitat Temperatures of the Red Firebug, Pyrrhocoris apterus: The Value of Small-Scale Climate Data Measurement. Insects. 14(11). 843–843. 1 indexed citations
7.
Kovac, Helmut, et al.. (2023). Relationship between Nest and Body Temperature and Microclimate in the Paper Wasp Polistes dominula. Insects. 14(11). 886–886. 7 indexed citations
8.
Stabentheiner, Anton, et al.. (2022). Effect of climate on strategies of nest and body temperature regulation in paper wasps, Polistes biglumis and Polistes gallicus. Scientific Reports. 12(1). 3372–3372. 16 indexed citations
9.
Stabentheiner, Anton, Helmut Kovac, Monika Mandl, & Helmut Käfer. (2021). Coping with the cold and fighting the heat: thermal homeostasis of a superorganism, the honeybee colony. Journal of Comparative Physiology A. 207(3). 337–351. 47 indexed citations
10.
Kovac, Helmut, Helmut Käfer, Iacopo Petrocelli, & Anton Stabentheiner. (2021). The respiratory metabolism of overwintering paper wasp gynes ( Polistes dominula and Polistes gallicus ). Physiological Entomology. 47(1). 62–71. 12 indexed citations
11.
Kovac, Helmut, Helmut Käfer, & Anton Stabentheiner. (2020). The Respiratory Metabolism of Polistes biglumis, a Paper Wasp from Mountainous Regions. Insects. 11(3). 165–165. 13 indexed citations
12.
Kovac, Helmut, et al.. (2020). Relation between activity, endothermic performance and respiratory metabolism in two paper wasps: Polistes dominula and Polistes gallicus. Comparative Biochemistry and Physiology Part A Molecular & Integrative Physiology. 250. 110804–110804. 3 indexed citations
13.
Kovac, Helmut, Helmut Käfer, & Anton Stabentheiner. (2018). The energetics and thermoregulation of water collecting honeybees. Journal of Comparative Physiology A. 204(9-10). 783–790. 11 indexed citations
14.
Kovac, Helmut, Helmut Käfer, Iacopo Petrocelli, & Anton Stabentheiner. (2016). Comparison of thermal traits of Polistes dominula and Polistes gallicus, two European paper wasps with strongly differing distribution ranges. Journal of Comparative Physiology B. 187(2). 277–290. 21 indexed citations
15.
Käfer, Helmut, Helmut Kovac, Barbara Oswald, & Anton Stabentheiner. (2015). Respiration and metabolism of the resting European paper wasp (Polistes dominulus). Journal of Comparative Physiology B. 185(6). 647–658. 20 indexed citations
16.
Kovac, Helmut, Helmut Käfer, Anton Stabentheiner, & Cecília Costa. (2014). Metabolism and upper thermal limits of Apis mellifera carnica and A. m. ligustica. Apidologie. 45(6). 664–677. 70 indexed citations
17.
Käfer, Helmut, Helmut Kovac, & Anton Stabentheiner. (2013). Respiration patterns of resting wasps (Vespula sp.). Journal of Insect Physiology. 59(4). 475–486. 4 indexed citations
18.
19.
Käfer, Helmut, Helmut Kovac, & Anton Stabentheiner. (2012). Resting metabolism and critical thermal maxima of vespine wasps (Vespula sp.). Journal of Insect Physiology. 58(5). 679–689. 25 indexed citations
20.
Käfer, Helmut, et al.. (2012). Upper thermal limits of honeybee (Apis mellifera) and yellowjacket (Vespula vulgaris) foragers. 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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