Karl Hammer

269 total papers · 4.5k total citations
163 papers, 2.7k citations indexed

About

Karl Hammer is a scholar working on Plant Science, Ecology, Evolution, Behavior and Systematics and Molecular Biology. According to data from OpenAlex, Karl Hammer has authored 163 papers receiving a total of 2.7k indexed citations (citations by other indexed papers that have themselves been cited), including 120 papers in Plant Science, 52 papers in Ecology, Evolution, Behavior and Systematics and 39 papers in Molecular Biology. Recurrent topics in Karl Hammer’s work include Botanical Research and Chemistry (23 papers), Botany and Plant Ecology Studies (21 papers) and Genetic and Environmental Crop Studies (18 papers). Karl Hammer is often cited by papers focused on Botanical Research and Chemistry (23 papers), Botany and Plant Ecology Studies (21 papers) and Genetic and Environmental Crop Studies (18 papers). Karl Hammer collaborates with scholars based in Germany, Italy and Iran. Karl Hammer's co-authors include Korous Khoshbakht, P. Perrino, Gaetano Laghetti, Peter Hanelt, H. Knüpffer, Christian Lehmann, Andreas Buerkert, Jens Gebauer, Klaus Pistrick and Domenico Pignone and has published in prestigious journals such as SHILAP Revista de lepidopterología, BioScience and Theoretical and Applied Genetics.

In The Last Decade

Co-authorship network of co-authors of Karl Hammer

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

Karl Hammer

150 papers receiving 2.3k citations

Fields of papers citing papers by Karl Hammer

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Countries citing papers authored by Karl Hammer

Since Specialization
Citations

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

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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2026