Robert J. Letcher
About
Robert J. Letcher is a scholar working on Health, Toxicology and Mutagenesis, Environmental Chemistry and Atmospheric Science.
According to data from OpenAlex, Robert J. Letcher has authored 442 papers receiving a total of 25.2k indexed citations (citations by other indexed papers that have themselves been cited), including 367 papers in Health, Toxicology and Mutagenesis, 123 papers in Environmental Chemistry and 72 papers in Atmospheric Science. Recurrent topics in Robert J. Letcher's work include Toxic Organic Pollutants Impact (331 papers), Effects and risks of endocrine disrupting chemicals (147 papers) and Per- and polyfluoroalkyl substances research (117 papers). Robert J. Letcher is often cited by papers focused on Toxic Organic Pollutants Impact (331 papers), Effects and risks of endocrine disrupting chemicals (147 papers) and Per- and polyfluoroalkyl substances research (117 papers). Robert J. Letcher collaborates with scholars based in Canada, United States and Denmark. Robert J. Letcher's co-authors include Derek C. G. Muir, Runé Dietz, Christian Sonne, Shaogang Chu, Guanyong Su, Magali Houde, Geir Wing Gabrielsen, Jonathan Verreault, Alana K. Greaves and Lewis T. Gauthier and has published in prestigious journals such as Science, Proceedings of the National Academy of Sciences and Angewandte Chemie International Edition.
In The Last Decade
Robert J. Letcher
435 papers receiving 24.5k citations
Hit Papers
Peers — A (Enhanced Table)
Peers by citation overlap · career bar shows stage (early→late) cites · hero ref
| Name | h | Career | Trend | Papers | Cites | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| Robert J. Letcher Canada | 86 | 20.2k | 7.1k | 4.7k | 4.1k | 3.4k | 442 | 25.2k | ||
| Keith R. Solomon Canada | 79 | 11.6k 0.6× | 6.0k 0.8× | 8.0k 1.7× | 2.6k 0.6× | 1.8k 0.5× | 414 | 23.9k | ||
| Shinsuke Tanabe Japan | 95 | 28.4k 1.4× | 4.5k 0.6× | 11.5k 2.4× | 1.8k 0.4× | 4.4k 1.3× | 734 | 36.3k | ||
| Ronald A. Hites United States | 87 | 19.5k 1.0× | 2.2k 0.3× | 7.0k 1.5× | 5.2k 1.3× | 1.2k 0.4× | 354 | 26.0k | ||
| Bixian Mai China | 80 | 17.2k 0.9× | 2.1k 0.3× | 9.3k 2.0× | 2.2k 0.5× | 1.6k 0.5× | 485 | 22.2k | ||
| Hélène Budzinski France | 72 | 13.4k 0.7× | 2.4k 0.3× | 8.4k 1.8× | 2.5k 0.6× | 2.0k 0.6× | 431 | 20.6k | ||
| J. de Boer Netherlands | 69 | 12.9k 0.6× | 2.8k 0.4× | 4.6k 1.0× | 1.6k 0.4× | 722 0.2× | 350 | 18.8k | ||
| Gan Zhang China | 93 | 21.1k 1.0× | 3.0k 0.4× | 14.2k 3.0× | 8.0k 1.9× | 2.9k 0.8× | 746 | 34.1k | ||
| Derek C. G. Muir Canada | 109 | 36.1k 1.8× | 15.4k 2.2× | 9.8k 2.1× | 11.6k 2.8× | 7.5k 2.2× | 719 | 46.6k | ||
| Frank Wania Canada | 76 | 15.7k 0.8× | 3.4k 0.5× | 4.9k 1.0× | 6.1k 1.5× | 960 0.3× | 344 | 19.5k | ||
| Tom Harner Canada | 78 | 16.5k 0.8× | 3.7k 0.5× | 4.1k 0.9× | 6.7k 1.6× | 636 0.2× | 239 | 19.4k |
Countries citing papers authored by Robert J. Letcher
Since
Specialization
Citations
This map shows the geographic impact of Robert J. Letcher'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 J. Letcher with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Robert J. Letcher more than expected).
Fields of papers citing papers by Robert J. Letcher
Since
Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences
This network shows the impact of papers produced by Robert J. Letcher. 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 J. Letcher. The network helps show where Robert J. Letcher may publish in the future.
Co-authorship network of co-authors of Robert J. Letcher
This figure shows the co-authorship network connecting the top 25 collaborators of Robert J. Letcher. A scholar is included among the top collaborators of Robert J. Letcher 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 J. Letcher. Robert J. Letcher is excluded from the visualization to improve readability, since they are connected to all nodes in the network.
All Works
1.
Morris, Adam D., Derek C. G. Muir, Magali Houde, et al.. (2025). Persistent pollutant exposure impacts metabolomic profiles in polar bears and ringed seals from the High Arctic and Hudson Bay, Canada. Environmental Research. 269. 120862–120862.
2.
Sonne, Christian, et al.. (2023). Unprecedented shift in Canadian High Arctic polar bear food web unsettles four millennia of stability. Anthropocene. 43. 100397–100397.
3.
Ciesielski, Tomasz Maciej, Christian Sonne, A. Smette, et al.. (2023). Testosterone and persistent organic pollutants in East Greenland male polar bears (Ursus maritimus). Heliyon. 9(3). e13263–e13263.
4.
McKinney, Melissa A., et al.. (2023). The influence of environmental and ecological factors on the accumulation and distribution of short- and long-chain perfluoroalkyl acids in a mid-trophic avian insectivore. Environmental Pollution. 321. 121133–121133.
5.
Lohmann, Rainer & Robert J. Letcher. (2023). The universe of fluorinated polymers and polymeric substances and potential environmental impacts and concerns. Current Opinion in Green and Sustainable Chemistry. 41. 100795–100795.
6.
Bradford, Scott A., Chongyang Shen, Hyunjung Kim, et al.. (2021). Environmental applications and risks of nanomaterials: An introduction to CREST publications during 2018–2021. Critical Reviews in Environmental Science and Technology. 52(21). 3753–3762.
7.
Morris, Adam D., Birgit M. Braune, Mary Gamberg, et al.. (2021). Temporal change and the influence of climate and weather factors on mercury concentrations in Hudson Bay polar bears, caribou, and seabird eggs. Environmental Research. 207. 112169–112169.
8.
Routti, Heli, Jon Aars, Todd C. Atwood, et al.. (2019). Contaminants in polar bears from the circumpolar Arctic: state of knowledge and further recommendations for monitoring and research - Action #42 of the Circumpolar action plan for polar bear conservation.
9.
Zhang, Yongkang, Guanyong Su, Meng Li, et al.. (2018). Chemical and biological transfer: Which one is responsible for the maternal transfer toxicity of tris(1,3-dichloro-2-propyl) phosphate in zebrafish?. Environmental Pollution. 243(Pt B). 1376–1382.
10.
Su, Guanyong, Robert J. Letcher, Hongxia Yu, David M. Gooden, & Heather M. Stapleton. (2016). Determination of glucuronide conjugates of hydroxyl triphenyl phosphate (OH-TPHP) metabolites in human urine and its use as a biomarker of TPHP exposure. Chemosphere. 149. 314–319.
11.
Sonne, Christian, Markus Dyck, Frank F. Rigét, et al.. (2015). Penile density and globally used chemicals in Canadian and Greenland polar bears. Environmental Research. 137. 287–291.
12.
Eng, Margaret L., Tony D. Williams, Robert J. Letcher, & John E. Elliott. (2014). Assessment of concentrations and effects of organohalogen contaminants in a terrestrial passerine, the European starling. The Science of The Total Environment. 473-474. 589–596.
13.
Marteinson, Sarah C., Robert J. Letcher, David M. Bird, et al.. (2013). Changes in the Incubation by American Kestrels ( Falco sparverius ) During Exposure to the Polybrominated Diphenyl Ether (PBDE) Mixture DE-71. Journal of Toxicology and Environmental Health. 76(16). 978–989.
14.
Letcher, Robert J., et al.. (2008). Why are salmon eggs red? Egg carotenoids and early life survival of Chinook salmon (Oncorhynchus tshawytscha). Evolutionary ecology research. 10(8). 1187–1199.
15.
Fernie, Kim J., et al.. (2007). Changes in Reproductive Courtship Behaviors of Adult American Kestrels (Falco sparverius) Exposed to Environmentally Relevant Levels of the Polybrominated Diphenyl Ether Mixture, DE-71. Toxicological Sciences. 102(1). 171–178.
16.
Gebbink, Wouter A., Christian Sonne, Runé Dietz, et al.. (2007). Tissue-specific congener composition of organohalogen and metabolite contaminants in East Greenland polar bears (Ursus maritimus). Environmental Pollution. 152(3). 621–629.
17.
Verreault, Jonathan, et al.. (2006). Maternal transfer of organohalogen contaminants and metabolites to eggs of Arctic-breeding glaucous gulls. Environmental Pollution. 144(3). 1053–1060.
18.
Cantón, Rocío F., J. Thomas Sanderson, Robert J. Letcher, Åke Bergman, & Martin van den Berg. (2005). Inhibition and Induction of Aromatase (CYP19) Activity by Brominated Flame Retardants in H295R Human Adrenocortical Carcinoma Cells. Toxicological Sciences. 88(2). 447–455.
19.
McKinney, Melissa A., Augustine Arukwe, Sylvain De Guise, et al.. (2004). Characterization and profiling of hepatic cytochromes P450 and phase II xenobiotic-metabolizing enzymes in beluga whales (Delphinapterus leucas) from the St. Lawrence River Estuary and the Canadian Arctic. Aquatic Toxicology. 69(1). 35–49.
20.
Meerts, Ilonka A.T.M., Robert J. Letcher, Saske Hoving, et al.. (2001). In vitro estrogenicity of polybrominated diphenyl ethers, hydroxylated PDBEs, and polybrominated bisphenol A compounds.. Environmental Health Perspectives. 109(4). 399–407.
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 Keith R. Solomon Breakdown of academic impact, for papers by Shinsuke Tanabe Breakdown of academic impact, for papers by Ronald A. Hites Breakdown of academic impact, for papers by Bixian Mai Breakdown of academic impact, for papers by Hélène Budzinski Breakdown of academic impact, for papers by J. de Boer Breakdown of academic impact, for papers by Gan Zhang Breakdown of academic impact, for papers by Derek C. G. Muir Breakdown of academic impact, for papers by Frank Wania Breakdown of academic impact, for papers by Tom Harner