Karen Hahn

1.9k total citations
63 papers, 1.4k citations indexed

About

Karen Hahn is a scholar working on Forestry, Ecology, Evolution, Behavior and Systematics and Nature and Landscape Conservation. According to data from OpenAlex, Karen Hahn has authored 63 papers receiving a total of 1.4k indexed citations (citations by other indexed papers that have themselves been cited), including 43 papers in Forestry, 39 papers in Ecology, Evolution, Behavior and Systematics and 21 papers in Nature and Landscape Conservation. Recurrent topics in Karen Hahn's work include African Botany and Ecology Studies (43 papers), Agriculture and Rural Development Research (24 papers) and Ecology and Vegetation Dynamics Studies (21 papers). Karen Hahn is often cited by papers focused on African Botany and Ecology Studies (43 papers), Agriculture and Rural Development Research (24 papers) and Ecology and Vegetation Dynamics Studies (21 papers). Karen Hahn collaborates with scholars based in Germany, Burkina Faso and Denmark. Karen Hahn's co-authors include Rüdiger Wittig, Adjima Thiombiano, Katja Heubach, Katharina Schumann, Ernst‐August Nuppenau, Markus Bernhardt‐Römermann, Georg Zizka, Marco Schmidt, Blandine Marie Ivette Nacoulma and Ute Becker and has published in prestigious journals such as Scientific Reports, Ecological Economics and Biological Conservation.

In The Last Decade

Karen Hahn

61 papers receiving 1.3k citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Karen Hahn Germany 21 769 598 393 370 365 63 1.4k
Rüdiger Wittig Germany 22 554 0.7× 590 1.0× 485 1.2× 462 1.2× 450 1.2× 69 1.6k
Orou G. Gaoue United States 22 576 0.7× 567 0.9× 421 1.1× 634 1.7× 462 1.3× 73 1.7k
Kolawolé Valère Salako Benin 20 512 0.7× 312 0.5× 275 0.7× 588 1.6× 241 0.7× 135 1.4k
L. H. de O. Wadt Brazil 20 401 0.5× 436 0.7× 533 1.4× 398 1.1× 523 1.4× 80 1.6k
Adandé Belarmain Fandohan Benin 20 565 0.7× 416 0.7× 157 0.4× 490 1.3× 145 0.4× 77 1.1k
Jean Lejoly Belgium 18 474 0.6× 464 0.8× 366 0.9× 328 0.9× 444 1.2× 113 1.1k
Charles M. Peters United States 18 330 0.4× 334 0.6× 790 2.0× 363 1.0× 345 0.9× 49 1.8k
Barbara Vinceti Italy 20 422 0.5× 482 0.8× 818 2.1× 520 1.4× 886 2.4× 54 2.1k
Nivaldo Peroni Brazil 27 266 0.3× 381 0.6× 479 1.2× 1.0k 2.8× 329 0.9× 96 2.1k
Evert Thomas Peru 23 220 0.3× 312 0.5× 394 1.0× 755 2.0× 247 0.7× 69 1.7k

Countries citing papers authored by Karen Hahn

Since Specialization
Citations

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

Fields of papers citing papers by Karen Hahn

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Karen Hahn

This figure shows the co-authorship network connecting the top 25 collaborators of Karen Hahn. A scholar is included among the top collaborators of Karen Hahn 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 Karen Hahn. Karen Hahn 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.
Mijarra, José María Postigo, et al.. (2025). Changes in distribution of the Iberian vegetation since the Last Glacial Maximum: A model-based approach. Quaternary Science Reviews. 351. 109162–109162.
2.
Neumann, Katharina, et al.. (2024). Afromontane forests and human impact after the African Humid Period: wood charcoal from the Sodicho rock shelter, SW Ethiopian highlands. Vegetation History and Archaeobotany. 33(4). 529–543.
3.
Hahn, Karen, et al.. (2023). Cooling-induced expansions of Afromontane forests in the Horn of Africa since the Last Glacial Maximum. Scientific Reports. 13(1). 10323–10323. 6 indexed citations
4.
Nacoulma, Blandine Marie Ivette, Marco Schmidt, Karen Hahn, & Adjima Thiombiano. (2020). A checklist of vascular plants of the W National Park in Burkina Faso, including the adjacent hunting zones of Tapoa-Djerma and Kondio. ZooKeys. 8. e54205–e54205. 3 indexed citations
5.
Bernhardt‐Römermann, Markus, et al.. (2019). Intraspecific habitat adaptation: How the germinability of herbaceous plant seeds change due to environmental conditions in West African savannas. Publication Server of Goethe University Frankfurt am Main (Goethe University Frankfurt). 22. 36–42. 1 indexed citations
6.
7.
Hahn, Karen, Marco Schmidt, & Adjima Thiombiano. (2018). use of wild plants for food: a national scale analysis for Burkina Faso (West Africa). Publication Server of Goethe University Frankfurt am Main (Goethe University Frankfurt). 21. 25–33. 13 indexed citations
8.
Schmidt, Marco, Alexander Zizka, Salifou Traoré, et al.. (2017). Diversity, distribution and preliminary conservation status of the flora of Burkina Faso. Phytotaxa. 304(1). 24 indexed citations
9.
10.
Bernhardt‐Römermann, Markus, et al.. (2016). Effects of Climate and Land Use on Herbaceous Species Richness and Vegetation Composition in West African Savanna Ecosystems. Publication Server of Goethe University Frankfurt am Main (Goethe University Frankfurt). 2016. 1–11. 26 indexed citations
11.
Heubach, Katja, et al.. (2016). The contribution of non-timber forest products (NTFPs) to rural household revenues in two villages in south-eastern Burkina Faso. Agroforestry Systems. 92(1). 139–155. 45 indexed citations
12.
Zizka, Alexander, Adjima Thiombiano, Stefan Dreßler, et al.. (2015). Traditional plant use in Burkina Faso (West Africa): a national-scale analysis with focus on traditional medicine. Journal of Ethnobiology and Ethnomedicine. 11(1). 9–9. 84 indexed citations
13.
Schumann, Katharina, et al.. (2015). Stratégies d’adaptation à la réduction des services écosystémiques : cas des potentialités de substitution de trois espèces forestières dans le Sud-Ouest du Burkina Faso. International Journal of Biological and Chemical Sciences. 9(3). 1194–1194. 6 indexed citations
14.
Bognounou, Fidèle, et al.. (2012). A comparison of Guibourtia copallifera Benn. stands in South West Burkina Faso-community structure and regeneration. Journal of Forestry Research. 23(1). 29–38. 10 indexed citations
15.
Schumann, Katharina, Rüdiger Wittig, Adjima Thiombiano, Ute Becker, & Karen Hahn. (2012). Uses, management, and population status of the baobab in eastern Burkina Faso. Agroforestry Systems. 85(2). 263–278. 39 indexed citations
16.
Ouédraogo, Oumarou, Marco Schmidt, Adjima Thiombiano, et al.. (2011). Magnoliophyta, Arly National Park, Tapoa, Burkina Faso [with erratum]. Check List. 7(1). 85–85. 10 indexed citations
17.
Traoré, Salifou, et al.. (2011). Impact of land use types on population structure and extent of bark and foliage harvest of Afzelia africana and Pterocarpus erinaceus in Eastern Burkina Faso. International Journal of Biodiversity and Conservation. 3(3). 62–72. 43 indexed citations
18.
Schumann, Katharina, Rüdiger Wittig, Adjima Thiombiano, Ute Becker, & Karen Hahn. (2010). Impact of land-use type and bark- and leaf-harvesting on population structure and fruit production of the baobab tree (Adansonia digitata L.) in a semi-arid savanna, West Africa. Forest Ecology and Management. 260(11). 2035–2044. 94 indexed citations
19.
Wind, Joshua J., et al.. (2005). Proton affinity of β-oxalylaminoalanine (BOAA): Incorporation of direct entropy correction into the single-reference kinetic method. Journal of the American Society for Mass Spectrometry. 16(7). 1151–1161. 22 indexed citations
20.
Hahn, Karen. (1991). EXTRA POINTS ON INJECTIONS. Nursing. 21(1). 4–9. 4 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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