Daniel H. Janzen

54.5k total citations · 24 hit papers
419 papers, 39.2k citations indexed

About

Daniel H. Janzen is a scholar working on Ecology, Evolution, Behavior and Systematics, Genetics and Insect Science. According to data from OpenAlex, Daniel H. Janzen has authored 419 papers receiving a total of 39.2k indexed citations (citations by other indexed papers that have themselves been cited), including 234 papers in Ecology, Evolution, Behavior and Systematics, 144 papers in Genetics and 132 papers in Insect Science. Recurrent topics in Daniel H. Janzen's work include Plant and animal studies (135 papers), Lepidoptera: Biology and Taxonomy (105 papers) and Hymenoptera taxonomy and phylogeny (87 papers). Daniel H. Janzen is often cited by papers focused on Plant and animal studies (135 papers), Lepidoptera: Biology and Taxonomy (105 papers) and Hymenoptera taxonomy and phylogeny (87 papers). Daniel H. Janzen collaborates with scholars based in United States, Canada and Costa Rica. Daniel H. Janzen's co-authors include Winnie Hallwachs, Paul D. N. Hebert, John M. Burns, W. J. Freeland, Mehrdad Hajibabaei, M. Alex Smith, Paul S. Martin, Elizabeth A. Zimmer, Lee A. Weigt and Kenneth J. Wurdack and has published in prestigious journals such as Nature, Science and Proceedings of the National Academy of Sciences.

In The Last Decade

Daniel H. Janzen

405 papers receiving 34.6k citations

Hit Papers

Herbivores and the Number of Tree Species in Tropical For... 1966 2026 1986 2006 1970 2004 1971 1967 2005 1000 2.0k 3.0k
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.

  1. Herbivores and the Number of Tree Species in Tropical Forests
    1970 3.6k citations Daniel H. Janzen profile →
  2. Ten species in one: DNA barcoding reveals cryptic species in the neotropical skipper butterfly Astraptes fulgerator
    2004 2.8k citations Paul D. N. Hebert, John M. Burns et al. Proceedings of the National Academy of Sciences profile →
  3. Seed Predation by Animals
    1971 1.6k citations Daniel H. Janzen profile →
  4. Why Mountain Passes are Higher in the Tropics
    1967 1.5k citations Daniel H. Janzen profile →
  5. Use of DNA barcodes to identify flowering plants
    2005 1.5k citations Daniel H. Janzen et al. Proceedings of the National Academy of Sciences profile →
  6. DNA barcodes distinguish species of tropical Lepidoptera
    2006 1.1k citations Daniel H. Janzen, John M. Burns et al. Proceedings of the National Academy of Sciences profile →
  7. Strategies in Herbivory by Mammals: The Role of Plant Secondary Compounds
    1974 1.1k citations Daniel H. Janzen et al. profile →
  8. Why Bamboos Wait So Long to Flower
    1976 721 citations Daniel H. Janzen profile →
  9. COEVOLUTION OF MUTUALISM BETWEEN ANTS AND ACACIAS IN CENTRAL AMERICA
    1966 691 citations Daniel H. Janzen profile →
  10. WHEN IS IT COEVOLUTION?
    1980 677 citations Daniel H. Janzen profile →
  11. Tropical Blackwater Rivers, Animals, and Mast Fruiting by the Dipterocarpaceae
    1974 665 citations Daniel H. Janzen Biotropica profile →
  12. Neotropical Anachronisms: The Fruits the Gomphotheres Ate
    1982 634 citations Daniel H. Janzen et al. profile →
  13. How to be a Fig
    1979 629 citations Daniel H. Janzen profile →
  14. Euglossine Bees as Long-Distance Pollinators of Tropical Plants
    1971 611 citations Daniel H. Janzen profile →
  15. Sweep Samples of Tropical Foliage Insects: Effects of Seasons, Vegetation Types, Elevation, Time of Day, and Insularity
    1973 543 citations Daniel H. Janzen profile →
  16. SEED‐EATERS VERSUS SEED SIZE, NUMBER, TOXICITY AND DISPERSAL
    1969 504 citations Daniel H. Janzen profile →
  17. Extreme diversity of tropical parasitoid wasps exposed by iterative integration of natural history, DNA barcoding, morphology, and collections
    2008 478 citations M. Alex Smith, James B. Whitfield et al. Proceedings of the National Academy of Sciences profile →
  18. SYNCHRONIZATION OF SEXUAL REPRODUCTION OF TREES WITHIN THE DRY SEASON IN CENTRAL AMERICA
    1967 476 citations Daniel H. Janzen profile →
  19. DNA barcodes reveal cryptic host-specificity within the presumed polyphagous members of a genus of parasitoid flies (Diptera: Tachinidae)
    2006 468 citations M. Alex Smith, Norman E. Woodley et al. Proceedings of the National Academy of Sciences profile →
  20. Why Fruits Rot, Seeds Mold, and Meat Spoils
    1977 405 citations Daniel H. Janzen profile →
  21. Costa Rican Natural History
    1983 397 citations Daniel H. Janzen profile →
  22. Differences in Insect Abundance and Diversity Between Wetter and Drier Sites During a Tropical Dry Season
    1968 379 citations Daniel H. Janzen et al. profile →
  23. Caterpillars lack a resident gut microbiome
    2017 339 citations Tobin J. Hammer, Daniel H. Janzen et al. Proceedings of the National Academy of Sciences profile →
  24. Costa Rican Natural History.
    1984 180 citations Daniel H. Janzen et al. profile →

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Daniel H. Janzen United States 93 20.9k 12.7k 12.5k 9.4k 8.9k 419 39.2k
Russell Lande United States 93 24.5k 1.2× 14.5k 1.1× 12.7k 1.0× 6.8k 0.7× 22.7k 2.6× 215 49.2k
Robert K. Colwell United States 66 13.2k 0.6× 16.5k 1.3× 15.7k 1.3× 5.0k 0.5× 5.0k 0.6× 136 37.2k
Daniel Simberloff United States 102 14.9k 0.7× 25.7k 2.0× 22.1k 1.8× 8.5k 0.9× 6.8k 0.8× 382 52.5k
John H. Lawton United Kingdom 101 18.0k 0.9× 21.6k 1.7× 21.1k 1.7× 7.4k 0.8× 6.5k 0.7× 280 47.8k
Robert D. Holt United States 96 15.0k 0.7× 21.2k 1.7× 17.1k 1.4× 4.5k 0.5× 10.4k 1.2× 300 45.3k
Peter E. Smouse United States 36 10.9k 0.5× 12.9k 1.0× 7.5k 0.6× 12.9k 1.4× 25.1k 2.8× 78 44.9k
Ary A. Hoffmann Australia 111 16.3k 0.8× 19.1k 1.5× 6.2k 0.5× 6.8k 0.7× 17.4k 2.0× 957 54.3k
François Rousset France 63 9.2k 0.4× 12.1k 1.0× 7.6k 0.6× 5.1k 0.5× 26.3k 3.0× 178 41.7k
Robert E. Ricklefs United States 106 19.9k 1.0× 22.4k 1.8× 14.8k 1.2× 3.2k 0.3× 6.6k 0.7× 496 43.1k
Dolph Schluter Canada 84 15.5k 0.7× 12.5k 1.0× 12.9k 1.0× 3.0k 0.3× 19.2k 2.2× 200 38.6k

Countries citing papers authored by Daniel H. Janzen

Since Specialization
Citations

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

Fields of papers citing papers by Daniel H. Janzen

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Daniel H. Janzen. 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 Daniel H. Janzen. The network helps show where Daniel H. Janzen may publish in the future.

Co-authorship network of co-authors of Daniel H. Janzen

This figure shows the co-authorship network connecting the top 25 collaborators of Daniel H. Janzen. A scholar is included among the top collaborators of Daniel H. Janzen 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 Daniel H. Janzen. Daniel H. Janzen 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.
2.
González, Jorge M., et al.. (2024). Synopsis of the Castniidae (Lepidoptera) of Costa Rica. Zootaxa. 5481(2). 151–202.
3.
4.
Sharkey, Michael J., M. Alex Smith, Suresh Naik, et al.. (2021). Addendum to a minimalist revision of Costa Rican Braconidae: 28 new species and 23 host records. ZooKeys. 1075. 77–136. 5 indexed citations
5.
Janzen, Daniel H. & Winnie Hallwachs. (2021). To us insectometers, it is clear that insect decline in our Costa Rican tropics is real, so let’s be kind to the survivors. Proceedings of the National Academy of Sciences. 118(2). 60 indexed citations
6.
McPhee, Megan V., et al.. (2020). Spider diversity across an elevation gradient in Área de Conservación Guanacaste (ACG), Costa Rica. Biotropica. 52(6). 1092–1102. 7 indexed citations
7.
Puschendorf, Robert, Andrew J. Crawford, Mairi E. Knight, et al.. (2019). Cryptic diversity and ranavirus infection of a critically endangered Neotropical frog before and after population collapse. Animal Conservation. 22(5). 515–524. 9 indexed citations
8.
9.
Hammer, Tobin J., Daniel H. Janzen, Winnie Hallwachs, Samuel Jaffe, & Noah Fierer. (2017). Caterpillars lack a resident gut microbiome. Proceedings of the National Academy of Sciences. 114(36). 9641–9646. 339 indexed citations breakdown →
10.
Wood, David M., et al.. (2017). Five new species of Vibrissina Rondani (Diptera: Tachinidae) from Area de Conservación Guanacaste in Northwestern Costa Rica. Biodiversity Data Journal. 5(5). e10967–e10967. 2 indexed citations
11.
Miller, Scott E., Axel Hausmann, Winnie Hallwachs, & Daniel H. Janzen. (2016). Advancing taxonomy and bioinventories with DNA barcodes. Philosophical Transactions of the Royal Society B Biological Sciences. 371(1702). 20150339–20150339. 67 indexed citations
12.
13.
Garcı́a, M.L., Mirjam Urb, R. Greg Thorn, et al.. (2012). Penicillium mallochii and P. guanacastense, two new species isolated from Costa Rican caterpillars. Mycotaxon. 119(1). 315–328. 22 indexed citations
14.
Hebert, Paul D. N., et al.. (2004). Ten species in one: DNA barcoding reveals cryptic species in the neotropical skipper butterfly Astraptes fulgerator. Proceedings of the National Academy of Sciences. 101(41). 14812–14817. 2758 indexed citations breakdown →
15.
Costa, James T., Terrence D. Fitzgerald, & Daniel H. Janzen. (2001). Trail-following behavior and natural history of the social caterpillar of Arsenura armida in Costa Rica (Lepidoptera: Saturniidae: Arsenurinae).. Tropical lepidoptera research. 12. 17–23. 9 indexed citations
16.
Janzen, Daniel H., Michael J. Sharkey, & Jennifer M. Burns. (1998). Parasitization biology of a new species of Braconidae (Hymenoptera) feeding on larvae of Costa Rican dry forest skippers (Lepidoptera: Hesperiidae: Pyrginae).. Tropical lepidoptera research. 9. 33–41. 14 indexed citations
17.
Janzen, Daniel H.. (1998). ESSAYS ON SCIENCE AND SOCIETY: Gardenification of Wildland Nature. Scientia Forestalis. 279. 1312. 2 indexed citations
18.
Janzen, Daniel H., et al.. (1997). New species of Euhapigiodes, new genus, and Hapigiodes in Hapigiini, new tribe, from Costa Rica, with notes on their life history and immatures (Lepidoptera: Notodontidae).. Tropical lepidoptera research. 8(2). 81–99. 4 indexed citations
19.
Whitfield, James B., et al.. (1996). Hansonia, a new genus of cardiochiline Braconidae (Hymenoptera) from Costa Rica, with notes on its biology. Proceedings of the Entomological Society of Washington. 98(3). 592–596. 7 indexed citations
20.
Janzen, Daniel H.. (1971). The fate of Scheelea rostrata fruits beneath the parent tree: predispersal attack by bruchids.. 15. 60 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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