Robert Hagen

1.1k total citations
27 papers, 574 citations indexed

About

Robert Hagen is a scholar working on Ecology, Social Psychology and Nature and Landscape Conservation. According to data from OpenAlex, Robert Hagen has authored 27 papers receiving a total of 574 indexed citations (citations by other indexed papers that have themselves been cited), including 16 papers in Ecology, 7 papers in Social Psychology and 5 papers in Nature and Landscape Conservation. Recurrent topics in Robert Hagen's work include Wildlife Ecology and Conservation (16 papers), Wildlife-Road Interactions and Conservation (6 papers) and Species Distribution and Climate Change (5 papers). Robert Hagen is often cited by papers focused on Wildlife Ecology and Conservation (16 papers), Wildlife-Road Interactions and Conservation (6 papers) and Species Distribution and Climate Change (5 papers). Robert Hagen collaborates with scholars based in Germany, United States and Austria. Robert Hagen's co-authors include Rudi Suchant, A. K. Pedersen, Barry J. Gainor, William C. Allen, George Piotrowski, Veronika Braunisch, Joy Coppes, Max Kröschel, Ilse Storch and Sylvia Ortmann and has published in prestigious journals such as PLoS ONE, The Science of The Total Environment and Journal of Bone and Joint Surgery.

In The Last Decade

Robert Hagen

26 papers receiving 534 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Robert Hagen Germany 13 240 225 110 75 72 27 574
Laura Bond United States 16 158 0.7× 243 1.1× 231 2.1× 18 0.2× 56 0.8× 46 839
T. Rupert Jones United States 14 148 0.6× 84 0.4× 6 0.1× 44 0.6× 57 0.8× 25 557
Rahul Kaul India 15 232 1.0× 103 0.5× 8 0.1× 71 0.9× 14 0.2× 66 620
Philip J. Clapham United States 12 130 0.5× 160 0.7× 8 0.1× 25 0.3× 61 0.8× 13 525
Dale Williams Canada 12 215 0.9× 517 2.3× 31 0.3× 7 0.1× 253 3.5× 26 840
Machteld C. Van Dierendonck Netherlands 15 118 0.5× 34 0.2× 90 0.8× 10 0.1× 4 0.1× 19 767
Claudio A. Moraga Chile 12 104 0.4× 606 2.7× 54 0.5× 6 0.1× 445 6.2× 25 777
Vincent Couallier France 8 44 0.2× 47 0.2× 40 0.4× 6 0.1× 14 0.2× 15 443
Thomas Fabbro Switzerland 11 54 0.2× 248 1.1× 19 0.2× 62 0.8× 254 3.5× 17 831
Kevin Boon Leong Lim Singapore 15 315 1.3× 222 1.0× 31 0.3× 9 0.1× 87 1.2× 59 702

Countries citing papers authored by Robert Hagen

Since Specialization
Citations

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

Fields of papers citing papers by Robert Hagen

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Robert Hagen

This figure shows the co-authorship network connecting the top 25 collaborators of Robert Hagen. A scholar is included among the top collaborators of Robert Hagen 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 Robert Hagen. Robert Hagen 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.
Kimmig, Sophia, Robert Hagen, Joachim Kimmerle, et al.. (2024). The role of information presentation for wildlife knowledge, attitude, and risk perception. Conservation Science and Practice. 6(3). 1 indexed citations
3.
Greving, Hannah, Till Bruckermann, Milena Stillfried, et al.. (2023). Attitudes Toward Engagement in Citizen Science Increase Self-Related, Ecology-Related, and Motivation-Related Outcomes in an Urban Wildlife Project. BioScience. 73(3). 206–219. 5 indexed citations
4.
Hagen, Robert, et al.. (2022). Behavioural reactions to oncoming vehicles as a crucial aspect of wildlife-vehicle collision risk in three common wildlife species. Accident Analysis & Prevention. 168. 106564–106564. 21 indexed citations
5.
Louvrier, Julie, Aimara Planillo, Konstantin Börner, et al.. (2022). Data-integration of opportunistic species observations into hierarchical modeling frameworks improves spatial predictions for urban red squirrels. Frontiers in Ecology and Evolution. 10. 6 indexed citations
6.
Louvrier, Julie, Aimara Planillo, Milena Stillfried, et al.. (2021). Spatiotemporal interactions of a novel mesocarnivore community in an urban environment before and during SARS‐CoV‐2 lockdown. Journal of Animal Ecology. 91(2). 367–380. 17 indexed citations
7.
Hagen, Robert, Norbert Kühl, Marc Hanewinkel, & Rudi Suchant. (2021). Number and height of unbrowsed saplings are more appropriate than the proportion of browsed saplings for predicting silvicultural regeneration success. Annals of Forest Science. 78(1). 3 indexed citations
8.
Hagen, Robert, et al.. (2018). Estimating red deer (Cervus elaphus) population size in the Southern Black Forest: the role of hunting in population control. European Journal of Wildlife Research. 64(4). 20 indexed citations
9.
Kröschel, Max, et al.. (2017). Temporal patterns in road crossing behaviour in roe deer (Capreolus capreolus) at sites with wildlife warning reflectors. PLoS ONE. 12(9). e0184761–e0184761. 36 indexed citations
10.
Coppes, Joy, et al.. (2017). Human recreation affects spatio-temporal habitat use patterns in red deer (Cervus elaphus). PLoS ONE. 12(5). e0175134–e0175134. 74 indexed citations
11.
Ortmann, Sylvia, et al.. (2017). No evidence for a ‘warning effect’ of blue light in roe deer. Wildlife Biology. 2017(1). 1–5. 6 indexed citations
12.
Hagen, Robert, et al.. (2017). Do roe deer react to wildlife warning reflectors? A test combining a controlled experiment with field observations. European Journal of Wildlife Research. 63(5). 22 indexed citations
13.
Hagen, Robert, et al.. (2016). Effectiveness of light-reflecting devices: A systematic reanalysis of animal-vehicle collision data. Accident Analysis & Prevention. 97. 242–260. 18 indexed citations
14.
Hagen, Robert, Stephanie Kramer‐Schadt, Lorenz Fahse, & Marco Heurich. (2014). Population control based on abundance estimates: Frequency does not compensate for uncertainty. Ecological Complexity. 20. 43–50. 8 indexed citations
15.
Hagen, Robert, et al.. (2013). Synchrony in hunting bags: Reaction on climatic and human induced changes?. The Science of The Total Environment. 468-469. 140–146. 16 indexed citations
16.
Walzl, Manfred, et al.. (2007). Pupillometrische Untersuchungen auf Schläfrigkeit bei Berufskraftfahrern. Zentralblatt für Arbeitsmedizin Arbeitsschutz und Ergonomie. 57(11). 349–364. 2 indexed citations
17.
Hagen, Robert. (1986). Ankle Arthrodesis. Clinical Orthopaedics and Related Research. 202(202). 152–162. 76 indexed citations
18.
Gainor, Barry J., Robert Hagen, & William C. Allen. (1983). Biomechanics of the spine in the polevaulter as related to spondylolysis. The American Journal of Sports Medicine. 11(2). 53–57. 21 indexed citations
19.
Gainor, Barry J., et al.. (1980). The throw: biomechanics and acute injury. The American Journal of Sports Medicine. 8(2). 114–118. 93 indexed citations
20.
Hagen, Robert, et al.. (1967). Post-traumatic arthrosis in the ankle and foot treated with arthrodesis.. PubMed. 133(7). 527–32. 5 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.

Explore authors with similar magnitude of impact

Breakdown of academic impact, for papers by Laura Bond Breakdown of academic impact, for papers by T. Rupert Jones Breakdown of academic impact, for papers by Rahul Kaul Breakdown of academic impact, for papers by Philip J. Clapham Breakdown of academic impact, for papers by Dale Williams Breakdown of academic impact, for papers by Machteld C. Van Dierendonck Breakdown of academic impact, for papers by Claudio A. Moraga Breakdown of academic impact, for papers by Vincent Couallier Breakdown of academic impact, for papers by Thomas Fabbro Breakdown of academic impact, for papers by Kevin Boon Leong Lim
Rankless by CCL
2026