World's Best Scientists 2026 revealed!
John B. Iverson

John B. Iverson

D-Index & Metrics

Ecology and Evolution

D-Index
54
Citations
11546
World Ranking
3125
National Ranking
1112

John B. Iverson publication distribution in Ecology and Evolution in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Ecology and Evolution in 2026. The highlighted bar marks where John B. Iverson sits on this spectrum.

37–46 publications: 11 scientists 47–56 publications: 41 scientists 57–66 publications: 147 scientists 67–76 publications: 219 scientists 77–86 publications: 409 scientists 87–96 publications: 467 scientists 97–106 publications: 613 scientists 107–116 publications: 585 scientists 117–126 publications: 591 scientists 127–136 publications: 567 scientists 137–146 publications: 535 scientists 147–156 publications: 481 scientists 157–166 publications: 404 scientists 167–176 publications: 338 scientists 177–186 publications: 362 scientists 187–196 publications: 309 scientists 197–206 publications: 246 scientists 207–216 publications: 223 scientists 217–226 publications: 205 scientists 227–236 publications: 167 scientists 237–246 publications: 141 scientists 247–256 publications: 150 scientists 257–266 publications: 125 scientists 267–276 publications: 113 scientists 277–286 publications: 92 scientists 287–296 publications: 81 scientists 297–306 publications: 77 scientists 307–316 publications: 64 scientists 317–326 publications: 47 scientists 327–336 publications: 58 scientists 337–346 publications: 52 scientists 347–356 publications: 48 scientists 357–366 publications: 50 scientists 367–376 publications: 30 scientists 377–386 publications: 30 scientists 387–396 publications: 34 scientists 397–406 publications: 25 scientists 407–416 publications: 17 scientists 417–426 publications: 12 scientists 427–436 publications: 20 scientists 437–446 publications: 9 scientists 447–456 publications: 12 scientists 457–466 publications: 11 scientists 467–476 publications: 13 scientists 477–486 publications: 10 scientists 487–496 publications: 7 scientists 497–506 publications: 12 scientists 507–516 publications: 10 scientists 517–526 publications: 9 scientists 527–532 publications: 6 scientists 533+ publications: 100 scientists
37 publications 533+

This scientist: 202 publications — 74th percentile

74% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 533 publications or more.

John B. Iverson D-index placement in Ecology and Evolution in 2026

The chart shows the D-index (discipline H-index) distribution of Ecology and Evolution scientists ranked by Research.com in 2026. The highlighted bar marks where John B. Iverson sits on this spectrum.

30 D-Index: 95 scientists 31 D-Index: 123 scientists 32 D-Index: 191 scientists 33 D-Index: 245 scientists 34 D-Index: 252 scientists 35 D-Index: 244 scientists 36 D-Index: 249 scientists 37 D-Index: 244 scientists 38 D-Index: 254 scientists 39 D-Index: 254 scientists 40 D-Index: 280 scientists 41 D-Index: 274 scientists 42 D-Index: 266 scientists 43 D-Index: 233 scientists 44 D-Index: 248 scientists 45 D-Index: 208 scientists 46 D-Index: 201 scientists 47 D-Index: 213 scientists 48 D-Index: 207 scientists 49 D-Index: 172 scientists 50 D-Index: 209 scientists 51 D-Index: 199 scientists 52 D-Index: 152 scientists 53 D-Index: 169 scientists 54 D-Index: 163 scientists 55 D-Index: 148 scientists 56 D-Index: 120 scientists 57 D-Index: 146 scientists 58 D-Index: 137 scientists 59 D-Index: 140 scientists 60 D-Index: 104 scientists 61 D-Index: 120 scientists 62 D-Index: 118 scientists 63 D-Index: 99 scientists 64 D-Index: 77 scientists 65 D-Index: 100 scientists 66 D-Index: 86 scientists 67 D-Index: 83 scientists 68 D-Index: 75 scientists 69 D-Index: 94 scientists 70 D-Index: 57 scientists 71 D-Index: 68 scientists 72 D-Index: 59 scientists 73 D-Index: 63 scientists 74 D-Index: 66 scientists 75 D-Index: 60 scientists 76 D-Index: 42 scientists 77 D-Index: 49 scientists 78 D-Index: 39 scientists 79 D-Index: 37 scientists 80 D-Index: 43 scientists 81 D-Index: 41 scientists 82 D-Index: 45 scientists 83 D-Index: 34 scientists 84 D-Index: 40 scientists 85 D-Index: 35 scientists 86 D-Index: 55 scientists 87 D-Index: 24 scientists 88 D-Index: 24 scientists 89 D-Index: 30 scientists 90 D-Index: 23 scientists 91 D-Index: 25 scientists 92 D-Index: 28 scientists 93 D-Index: 27 scientists 94 D-Index: 13 scientists 95 D-Index: 23 scientists 96 D-Index: 12 scientists 97 D-Index: 14 scientists 98 D-Index: 19 scientists 99 D-Index: 16 scientists 100 D-Index: 14 scientists 101 D-Index: 5 scientists 102 D-Index: 21 scientists 103 D-Index: 16 scientists 104 D-Index: 10 scientists 105 D-Index: 8 scientists 106 D-Index: 7 scientists 107 D-Index: 7 scientists 108 D-Index: 6 scientists 109 D-Index: 9 scientists 110 D-Index: 11 scientists 111 D-Index: 12 scientists 112 D-Index: 9 scientists 113 D-Index: 7 scientists 114 D-Index: 3 scientists 115 D-Index: 8 scientists 116 D-Index: 5 scientists 117 D-Index: 11 scientists 118 D-Index: 4 scientists 119 D-Index: 2 scientists 120 D-Index: 5 scientists 121 D-Index: 3 scientists 122+ D-Index: 99 scientists
30 D-Index 122+

This scientist: 54 D-Index — 64th percentile

64% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 122 D-Index or more.

Overview

John B. Iverson is affiliated with Earlham College in the United States and works primarily in the field of Environmental Science. Their research covers several subfields including Nature and Landscape Conservation, Global and Planetary Change, Ecology, Ecology Evolution Behavior and Systematics, and Parasitology.

Iverson's main topics of study focus on Turtle Biology and Conservation, Amphibian and Reptile Biology, Wildlife Ecology and Conservation, Physiological and Biochemical Adaptations, Animal Behavior and Reproduction, Avian Ecology and Behavior, and Vector-borne Infectious Diseases.

Among their recent papers are:

  • Turtles and Tortoises Are in Trouble, 2020, Current Biology
  • Diverse aging rates in ectothermic tetrapods provide insights for the evolution of aging and longevity, 2022, Science
  • Mother knows best: nest-site choice homogenizes embryo thermal environments among populations in a widespread ectotherm, 2023, Philosophical Transactions of the Royal Society B Biological Sciences
  • Sex-specific innate immunity and ageing in long-lived fresh water turtles (Kinosternon flavescens: Kinosternidae), 2023, Immunity & Ageing
  • A review of Chelonian type specimens (order Testudines), 2022, Megataxa

They have frequently published in the journal Chelonian Conservation and Biology alongside other venues such as Current Biology, Science, Philosophical Transactions of the Royal Society B Biological Sciences, and Immunity & Ageing.

The scientist often collaborates with co-authors including Anders G. J. Rhodin, Charles Knapp, E. L. V. Lewis, Luca Luiselli, and H. Bradley Shaffer. These collaborations have contributed to multiple publications, indicating active engagement within their research community.

John B. Iverson also has contributions to book publications, notably a title published by Chelonian Research Monographs: Turtles of the World: Annotated Checklist and Atlas of Taxonomy, Synonymy, Distribution, and Conservation Status (10th Ed.), expected in 2025.

Best Publications

  • The conservation status of the world's reptiles

    Monika Böhm;Ben Collen;Jonathan E.M. Baillie;Philip Bowles

  • A revised checklist with distribution maps of the turtles of the world

    John B. Iverson

  • Turtles and Tortoises Are in Trouble

    Craig B. Stanford;Craig B. Stanford;John B. Iverson;Anders G.J. Rhodin;Peter Paul van Dijk

  • Coefficient shifts in geographical ecology: an empirical evaluation of spatial and non-spatial regression

    L. Mauricio Bini;J. Alexandre F. Diniz-Filho;Thiago F.L.V.B. Rangel;Thomas S.B. Akre

  • A Global Analysis of Tortoise and Freshwater Turtle Distributions with Identification of Priority Conservation Areas

    Kurt A. Buhlmann;Thomas S. B. Akre;John B. Iverson;Deno Karapatakis;Deno Karapatakis

  • Phylogenetic hypotheses for the turtle family Geoemydidae.

    Phillip Q. Spinks;H. Bradley Shaffer;John B. Iverson;William P. McCord

  • Patterns of survivorship in turtles (order Testudines)

    John B. Iverson

  • Global conservation status of turtles and tortoises (order Testudines)

    Anders G.J. Rhodin;Craig B. Stanford;Peter Paul Van Dijk;Carla Eisemberg

  • Turtles of the World: Annotated Checklist and Atlas of Taxonomy, Synonymy, Distribution, and Conservation Status (8th Ed.)

    Anders G.J. Rhodin;John B. Iverson;Roger Bour;Uwe Fritz

  • Taxonomy based on science is necessary for global conservation

    Scott A. Thomson;Richard L. Pyle;Shane T Ahyong;Shane T Ahyong;Miguel A. Alonso-Zarazaga

  • Turtles of the World, 7th Edition: Annotated Checklist of Taxonomy, Synonymy, Distribution with Maps, and Conservation Status.

    Peter Paul van Dijk;John Iverson;Anders Rhodin;Bradley Shaffer

  • Patterns of survival, growth and maturation in turtles

    Richard Shine;John B. Iverson

  • Conservation biology of freshwater turtles and tortoises : a compilation project of the IUCN/SSC Tortoise and Freshwater Turtle Specialist Group

    Kurt A. Buhlmann;Peter Paul van Dijk;John B. Iverson;Russell A. Mittermeier

  • Reproductive Ecology of the Painted Turtle (Chrysemys picta) in the Nebraska Sandhills and across Its Range

    John B. Iverson;Geoffrey R. Smith

  • Biomass in turtle populations: A neglected subject.

    John B. Iverson

  • LIFE HISTORY AND DEMOGRAPHY OF THE YELLOW MUD TURTLE, KINOSTERNON FLAVESCENS

    John B. Iverson

  • The impact of feral cats and dogs on populations of the West Indian rock iguana, Cyclura carinata

    John B. Iverson

  • BEHAVIOR AND ECOLOGY OF THE ROCK IGUANA, CYCLURA CARINATA

    Jb Iverson;Iverson Jb

  • Latitudinal variation in egg and clutch size in turtles

    John B. Iverson;Christine P. Balgooyen;Kathy K. Byrd;Kelly K. Lyddan

  • Molecular systematics, phylogeography, and the effects of Pleistocene glaciation in the painted turtle (Chrysemys picta) complex.

    David E. Starkey;H. Bradley Shaffer;Russell L. Burke;Michael R. J. Forstner

Frequent Co-Authors

Richard E. Lee
Richard E. Lee Miami University
Jeffrey E. Lovich
Jeffrey E. Lovich United States Geological Survey
Arthur Georges
Arthur Georges University of Canberra
H. Bradley Shaffer
H. Bradley Shaffer University of California, Los Angeles
Jacqueline D. Litzgus
Jacqueline D. Litzgus Laurentian University
Russell A. Mittermeier
Russell A. Mittermeier Conservation International
Uwe Fritz
Uwe Fritz American Museum of Natural History
Patrick J. Baker
Patrick J. Baker University of Melbourne
Hidetoshi Ota
Hidetoshi Ota University of Hyogo
Kevin de Queiroz
Kevin de Queiroz National Museum of Natural History

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