Sylvia Ortmann

8.0k total citations · 1 hit paper
127 papers, 4.6k citations indexed

About

Sylvia Ortmann is a scholar working on Ecology, Agronomy and Crop Science and Genetics. According to data from OpenAlex, Sylvia Ortmann has authored 127 papers receiving a total of 4.6k indexed citations (citations by other indexed papers that have themselves been cited), including 54 papers in Ecology, 51 papers in Agronomy and Crop Science and 41 papers in Genetics. Recurrent topics in Sylvia Ortmann's work include Ruminant Nutrition and Digestive Physiology (49 papers), Wildlife Ecology and Conservation (41 papers) and Genetic and phenotypic traits in livestock (33 papers). Sylvia Ortmann is often cited by papers focused on Ruminant Nutrition and Digestive Physiology (49 papers), Wildlife Ecology and Conservation (41 papers) and Genetic and phenotypic traits in livestock (33 papers). Sylvia Ortmann collaborates with scholars based in Germany, Switzerland and United States. Sylvia Ortmann's co-authors include Gerhard Heldmaier, Marcus Clauß, Angela Schwarm, Ralf Elvert, W. Jürgen Streich, Jürgen Hummel, Matthias H. Tschöp, Enzo Nisoli, Beat Lutz and Daniela Cota and has published in prestigious journals such as Journal of Clinical Investigation, SHILAP Revista de lepidopterología and PLoS ONE.

In The Last Decade

Sylvia Ortmann

123 papers receiving 4.5k citations

Hit Papers

align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

The endogenous cannabinoid system affects energy balance via central orexigenic drive and peripheral lipogenesis

2003 951 citations Sylvia Ortmann et al. profile →

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Sylvia Ortmann Germany	35	1.4k	918	888	824	752	127	4.6k
Mary Ann Ottinger United States	41	833 0.6×	1.2k 1.3×	615 0.7×	122 0.1×	832 1.1×	212	6.4k
Chadi Touma Germany	34	753 0.5×	717 0.8×	745 0.8×	175 0.2×	502 0.7×	87	5.7k
Andrea Fuller South Africa	35	1.5k 1.1×	1.4k 1.6×	841 0.9×	109 0.1×	335 0.4×	171	4.4k
Marc Legendre France	31	616 0.4×	355 0.4×	307 0.3×	111 0.1×	1.7k 2.3×	119	9.5k
Colin G. Scanes United States	46	893 0.6×	846 0.9×	714 0.8×	82 0.1×	1.1k 1.5×	352	8.6k
Jon M. Arnemo Norway	30	1.7k 1.2×	711 0.8×	443 0.5×	118 0.1×	831 1.1×	170	3.9k
Gregory E. Demas United States	52	1.3k 1.0×	2.3k 2.5×	1.5k 1.7×	61 0.1×	792 1.1×	161	8.2k
Richard Peter Canada	74	1.6k 1.2×	565 0.6×	1.3k 1.5×	177 0.2×	2.5k 3.3×	306	17.4k
Sandra L. Rodriguez‐Zas United States	49	361 0.3×	1.3k 1.4×	576 0.6×	103 0.1×	3.4k 4.5×	233	8.0k
Andrew Loudon United Kingdom	53	768 0.6×	568 0.6×	3.4k 3.9×	81 0.1×	796 1.1×	178	10.2k

Countries citing papers authored by Sylvia Ortmann

Since Specialization

Citations

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

Fields of papers citing papers by Sylvia Ortmann

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Sylvia Ortmann

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

All Works

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20 of 20 papers shown

Lindshield, Stacy, Papa Ibnou Ndiaye, Sylvia Ortmann, et al.. (2025). The nutritional quality of male chimpanzee diets in a semiarid savanna. Journal of Human Evolution. 204. 103684–103684.

Jarquín‐Díaz, Víctor Hugo, Aimara Planillo, Viktoriia Radchuk, et al.. (2024). Host weight, seasonality and anthropogenic factors contribute to parasite community differences between urban and rural foxes. The Science of The Total Environment. 936. 173355–173355. 1 indexed citations

Bortolamiol, Sarah, et al.. (2022). All-You-Can-Eat: Influence of Proximity to Maize Gardens on the Wild Diet and the Forest Activities of the Sebitoli Chimpanzee Community in Kibale National Park. Animals. 12(7). 806–806. 5 indexed citations

Wagner, Franziska, Irina Ruf, Thomas Lehmann, et al.. (2021). Reconstruction of evolutionary changes in fat and toxin consumption reveals associations with gene losses in mammals: A case study for the lipase inhibitor PNLIPRP1 and the xenobiotic receptor NR1I3. Journal of Evolutionary Biology. 35(2). 225–239. 7 indexed citations

Wagner, Franziska, Peter Giere, Peter Grobe, et al.. (2021). Phenotyping in the era of genomics: MaTrics—a digital character matrix to document mammalian phenotypic traits. Mammalian Biology. 102(1). 235–249. 4 indexed citations

Schiffmann, Christian, et al.. (2020). Extrahepatic biliary tract pathologies in mammalian species of zoo animals and wildlife: a review. SHILAP Revista de lepidopterología. 81(1). 2 indexed citations

Liesegang, Annette, et al.. (2020). Effects of dietary grapeseed extract on performance, energy and nitrogen balance as well as methane and nitrogen losses of lambs and goat kids. British Journal Of Nutrition. 125(1). 26–37. 4 indexed citations

Hohmann, Gottfried, Sylvia Ortmann, Thomas Remer, & Barbara Fruth. (2019). Fishing for iodine: what aquatic foraging by bonobos tells us about human evolution. BMC Zoology. 4(1). 12 indexed citations

Böcker, Lukas, et al.. (2018). Biphasic short time heat degradation of the blue microalgae protein phycocyanin from Arthrospira platensis. Innovative Food Science & Emerging Technologies. 52. 116–121. 39 indexed citations

10.

Potts, Kevin B., Erica K. Baken, Sylvia Ortmann, David P. Watts, & Richard W. Wrangham. (2015). Variability in Population Density Is Paralleled by Large Differences in Foraging Efficiency in Chimpanzees (Pan troglodytes). International Journal of Primatology. 36(6). 1101–1119. 18 indexed citations

11.

Ortmann, Sylvia, et al.. (2014). Comparative digesta retention patterns in ratites. The Auk. 132(1). 119–131. 41 indexed citations

12.

Deschner, Tobias, et al.. (2010). Monitoring nutritional stress with urinary delta N-15 and c/n ratios in captive bonobos. Max Planck Institute for Plasma Physics. 2 indexed citations

13.

Schwarm, Angela, et al.. (2009). Function, size and form of the gastrointestinal tract of the collared Pecari tajacu (Linnaeus 1758) and white-lipped peccary Tayassu pecari (Link 1795). European Journal of Wildlife Research. 56(4). 569–576. 23 indexed citations

14.

Masi, Shelly, Chloé Cipolletta, Sylvia Ortmann, Roger Mundry, & Martha M. Robbins. (2009). Does a more frugivorous diet lead to an increase in energy intake and energy expenditure? The case of the western lowland gorillas at Bai-Hokou, Central African Republic. Folia Primatologica. 372–373. 5 indexed citations

15.

Hohmann, Gottfried, Kevin B. Potts, Andrew Fowler, et al.. (2009). Plant foods consumed by Pan: Exploring the variation of nutritional ecology across Africa. American Journal of Physical Anthropology. 141(3). 476–485. 49 indexed citations

16.

Ganas, Jessica, Sylvia Ortmann, & Martha M. Robbins. (2008). Food choice strategies of Mountain Gorilla groups in Bwindi Impenetrable National Park, Uganda. Folia Primatologica. 331–332. 1 indexed citations

17.

Schwarm, Angela, Sylvia Ortmann, Heribert Hofer, et al.. (2006). Digestion studies in captive Hippopotamidae: a group of large ungulates with an unusually low metabolic rate. Journal of Animal Physiology and Animal Nutrition. 90(7-8). 300–308. 38 indexed citations

18.

Clauß, Marcus, Angela Schwarm, Sylvia Ortmann, et al.. (2004). Intake, ingesta retention, particle size distribution and digestibility in the hippopotamidae. Comparative Biochemistry and Physiology Part A Molecular & Integrative Physiology. 139(4). 449–459. 44 indexed citations

19.

Ortmann, Sylvia, et al.. (2003). Self‐Selected Macronutrient Diet Affects Energy and Glucose Metabolism in Brown Fat‐Ablated Mice. Obesity Research. 11(12). 1536–1544. 12 indexed citations

20.

Wiedmer, Petra, Sylvia Ortmann, & Susanne Klaus. (2002). Energy metabolism of young rats after early postnatal overnutrition. British Journal Of Nutrition. 88(3). 301–306. 19 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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