T. Ulmar Grafe

3.4k total citations · 1 hit paper
87 papers, 2.6k citations indexed

About

T. Ulmar Grafe is a scholar working on Ecology, Evolution, Behavior and Systematics, Global and Planetary Change and Developmental Biology. According to data from OpenAlex, T. Ulmar Grafe has authored 87 papers receiving a total of 2.6k indexed citations (citations by other indexed papers that have themselves been cited), including 60 papers in Ecology, Evolution, Behavior and Systematics, 40 papers in Global and Planetary Change and 30 papers in Developmental Biology. Recurrent topics in T. Ulmar Grafe's work include Amphibian and Reptile Biology (40 papers), Animal Vocal Communication and Behavior (30 papers) and Animal Behavior and Reproduction (29 papers). T. Ulmar Grafe is often cited by papers focused on Amphibian and Reptile Biology (40 papers), Animal Vocal Communication and Behavior (30 papers) and Animal Behavior and Reproduction (29 papers). T. Ulmar Grafe collaborates with scholars based in Brunei, Germany and United States. T. Ulmar Grafe's co-authors include K. Eduard Linsenmair, Mark‐Oliver Rödel, Walter Federle, Thomas Cherico Wanger, Alexander Keller, Gerald Kerth, Caroline R. Schöner, Ulrike Bauer, Peter M. Narins and Tom M. Peake and has published in prestigious journals such as SHILAP Revista de lepidopterología, PLoS ONE and Current Biology.

In The Last Decade

T. Ulmar Grafe

80 papers receiving 2.5k 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.

Animal Communication Networks

2005 493 citations T. Ulmar Grafe et al. profile →

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
T. Ulmar Grafe Brunei	28	1.7k	1.0k	954	636	346	87	2.6k
Jesse R. Barber United States	35	2.1k 1.2×	2.3k 2.2×	603 0.6×	2.9k 4.5×	134 0.4×	85	4.6k
Stéphanie M. Doucet Canada	26	2.2k 1.3×	564 0.5×	459 0.5×	1.1k 1.8×	76 0.2×	83	2.8k
Karin S. Pfennig United States	26	1.9k 1.1×	281 0.3×	631 0.7×	684 1.1×	180 0.5×	66	2.6k
Reginald B. Cocroft United States	31	2.5k 1.4×	595 0.6×	664 0.7×	275 0.4×	701 2.0×	69	3.1k
Marc Théry France	28	2.0k 1.1×	227 0.2×	709 0.7×	798 1.3×	131 0.4×	63	2.6k
János Török Hungary	39	3.0k 1.8×	509 0.5×	655 0.7×	2.3k 3.7×	136 0.4×	155	4.2k
Rebecca J. Safran United States	38	2.9k 1.7×	626 0.6×	530 0.6×	1.8k 2.8×	104 0.3×	116	4.4k
Ethan J. Temeles United States	24	2.1k 1.2×	287 0.3×	358 0.4×	925 1.5×	696 2.0×	42	2.7k
Jeffrey R. Lucas United States	35	2.0k 1.1×	1.1k 1.0×	250 0.3×	1.3k 2.0×	86 0.2×	110	3.3k
Marc W. Holderied United Kingdom	27	1.6k 0.9×	963 0.9×	353 0.4×	1.3k 2.1×	83 0.2×	98	2.3k

Countries citing papers authored by T. Ulmar Grafe

Since Specialization

Citations

This map shows the geographic impact of T. Ulmar Grafe'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 T. Ulmar Grafe with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites T. Ulmar Grafe more than expected).

Fields of papers citing papers by T. Ulmar Grafe

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by T. Ulmar Grafe. 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 T. Ulmar Grafe. The network helps show where T. Ulmar Grafe may publish in the future.

Co-authorship network of co-authors of T. Ulmar Grafe

This figure shows the co-authorship network connecting the top 25 collaborators of T. Ulmar Grafe. A scholar is included among the top collaborators of T. Ulmar Grafe 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 T. Ulmar Grafe. T. Ulmar Grafe 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

Grafe, T. Ulmar, et al.. (2025). Arms race of physical defences: hooked trichomes of Macaranga ant-plants kill lycaenid caterpillars, but one specialist has a counter-defence. Biology Letters. 21(6). 20250005–20250005. 1 indexed citations

Grafe, T. Ulmar, et al.. (2025). Uninvited guests: diversity and specificity of Trypanosoma infections in frog-biting midges (Corethrella spp.). Parasites & Vectors. 18(1). 348–348.

Grafe, T. Ulmar, et al.. (2024). An experimental array setup to study the integration of biosonar and maneuvering flight in bats. The Journal of the Acoustical Society of America. 155(3_Supplement). A244–A244.

Schilthuizen, Menno, Iva Njunjić, Massimo Delledonne, et al.. (2023). A new semi-slug of the genus Microparmarion from Brunei, discovered, described and DNA-barcoded on citizen-science 'taxon expeditions' (Gastropoda, Stylommatophora, Ariophantidae). ZooKeys. 11. e101579–e101579. 1 indexed citations

Schilthuizen, Menno, Massimiliano Alfano, Daniele Cicuzza, et al.. (2020). Craspedotropis gretathunbergae, a new species of Cyclophoridae (Gastropoda: Caenogastropoda), discovered and described on a field course to Kuala Belalong rainforest, Brunei. ZooKeys. 8. e47484–e47484.

Grafe, T. Ulmar, et al.. (2020). Beyond the limits: identifying the high-frequency detectors in the anuran ear. Biology Letters. 16(7). 20200343–20200343. 8 indexed citations

Schilthuizen, Menno, Daniele Cicuzza, Pierre Escoubas, et al.. (2019). A new species of Clavicornaltica (Coleoptera: Chrysomelidae), discovered and described on a field course to Kuala Belalong, Brunei. Biodiversity Data Journal. 7(7). e32555–e32555. 1 indexed citations

Goutte, Sandra, et al.. (2017). Environmental correlates of species richness and composition of riparian anuran communities in rainforests of northwestern Borneo: a metacommunity perspective. Herpetological Journal. 27(1). 25–32. 6 indexed citations

Schöner, Caroline R., et al.. (2017). Stabilization of a bat-pitcher plant mutualism. Scientific Reports. 7(1). 13170–13170. 3 indexed citations

10.

Sickel, Wiebke, et al.. (2016). Bacterial Diversity and Community Structure in Two Bornean Nepenthes Species with Differences in Nitrogen Acquisition Strategies. Microbial Ecology. 71(4). 938–953. 14 indexed citations

11.

Schöner, Caroline R., et al.. (2015). How a pitcher plant facilitates roosting of mutualistic woolly bats. Evolutionary ecology research. 16(7). 581–591. 12 indexed citations

12.

Grafe, T. Ulmar, Doris Preininger, Marc Sztatecsny, et al.. (2012). Multimodal Communication in a Noisy Environment: A Case Study of the Bornean Rock Frog Staurois parvus. PLoS ONE. 7(5). e37965–e37965. 95 indexed citations

13.

Grafe, T. Ulmar, et al.. (2009). Supplementary feeding affects the breeding behaviour of male European treefrogs (Hyla arborea). BMC Ecology. 9(1). 1–1. 49 indexed citations

14.

Arch, Victoria S., T. Ulmar Grafe, Marcos Gridi‐Papp, & Peter M. Narins. (2009). Pure Ultrasonic Communication in an Endemic Bornean Frog. PLoS ONE. 4(4). e5413–e5413. 29 indexed citations

15.

Keller, Alexander, Mark‐Oliver Rödel, K. Eduard Linsenmair, & T. Ulmar Grafe. (2008). The importance of environmental heterogeneity for species diversity and assemblage structure in Bornean stream frogs. Journal of Animal Ecology. 78(2). 305–314. 88 indexed citations

16.

Arch, Victoria S., T. Ulmar Grafe, & Peter M. Narins. (2007). Ultrasonic signalling by a Bornean frog. Biology Letters. 4(1). 19–22. 53 indexed citations

17.

Rheindt, Frank E., T. Ulmar Grafe, & Ehab Abouheif. (2004). Rapidly evolving traits and the comparative method: how important is testing for phylogenetic signal?. Evolutionary ecology research. 6(3). 377–396. 46 indexed citations

18.

Grafe, T. Ulmar, et al.. (2004). Demographic dynamics of the afro-tropical pig-nosed frog, Hemisus marmoratus: effects of climate and predation on survival and recruitment. Oecologia. 141(1). 40–46. 29 indexed citations

19.

Grafe, T. Ulmar, et al.. (2001). Energetics of calling and metabolic substrate use during prolonged exercise in the European treefrog Hyla arborea. Journal of Comparative Physiology B. 171(1). 69–76. 50 indexed citations

20.

Grafe, T. Ulmar. (1996). Energetics of vocalization in the African reed frog (Hyperolius marmoratus). Comparative Biochemistry and Physiology Part A Physiology. 114(3). 235–243. 38 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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