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
3120
National Ranking
1112

John B. Iverson publications per year

1975: 2 publications 1976: 0 publications 1977: 3 publications 1978: 3 publications 1979: 7 publications 1980: 7 publications 1981: 0 publications 1982: 2 publications 1983: 0 publications 1984: 2 publications 1985: 2 publications 1986: 2 publications 1987: 2 publications 1988: 2 publications 1989: 5 publications 1990: 3 publications 1991: 6 publications 1992: 8 publications 1993: 4 publications 1994: 2 publications 1995: 2 publications 1996: 1 publications 1997: 4 publications 1998: 1 publications 1999: 1 publications 2000: 4 publications 2001: 6 publications 2002: 4 publications 2003: 3 publications 2004: 5 publications 2005: 2 publications 2006: 5 publications 2007: 3 publications 2008: 5 publications 2009: 6 publications 2010: 7 publications 2011: 4 publications 2012: 6 publications 2013: 8 publications 2014: 6 publications 2015: 4 publications 2016: 9 publications 2017: 9 publications 2018: 6 publications 2019: 13 publications 2020: 4 publications 2021: 6 publications 2022: 8 publications 2023: 4 publications 2024: 10 publications 2025: 6 publications
1975 2025

224 publications in total across all disciplines

John B. Iverson publication distribution in Ecology and Evolution in 2027

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Ecology and Evolution in 2027. The highlighted bar marks where John B. Iverson sits on this spectrum.

37–41 publications: 2 scientists 42–46 publications: 9 scientists 47–51 publications: 10 scientists 52–56 publications: 31 scientists 57–61 publications: 56 scientists 62–66 publications: 91 scientists 67–71 publications: 92 scientists 72–76 publications: 127 scientists 77–81 publications: 173 scientists 82–86 publications: 236 scientists 87–91 publications: 227 scientists 92–96 publications: 240 scientists 97–101 publications: 333 scientists 102–106 publications: 280 scientists 107–111 publications: 300 scientists 112–116 publications: 285 scientists 117–121 publications: 305 scientists 122–126 publications: 287 scientists 127–131 publications: 278 scientists 132–136 publications: 289 scientists 137–141 publications: 273 scientists 142–146 publications: 262 scientists 147–151 publications: 246 scientists 152–156 publications: 235 scientists 157–161 publications: 205 scientists 162–166 publications: 199 scientists 167–171 publications: 174 scientists 172–176 publications: 164 scientists 177–181 publications: 173 scientists 182–186 publications: 189 scientists 187–191 publications: 170 scientists 192–196 publications: 139 scientists 197–201 publications: 128 scientists 202–206 publications: 117 scientists 207–211 publications: 115 scientists 212–216 publications: 107 scientists 217–221 publications: 124 scientists 222–226 publications: 81 scientists 227–231 publications: 82 scientists 232–236 publications: 85 scientists 237–241 publications: 75 scientists 242–246 publications: 66 scientists 247–251 publications: 81 scientists 252–256 publications: 69 scientists 257–261 publications: 70 scientists 262–266 publications: 55 scientists 267–271 publications: 64 scientists 272–276 publications: 49 scientists 277–281 publications: 48 scientists 282–286 publications: 44 scientists 287–291 publications: 45 scientists 292–296 publications: 36 scientists 297–301 publications: 39 scientists 302–306 publications: 38 scientists 307–311 publications: 30 scientists 312–316 publications: 34 scientists 317–321 publications: 25 scientists 322–326 publications: 22 scientists 327–331 publications: 28 scientists 332–336 publications: 30 scientists 337–341 publications: 22 scientists 342–346 publications: 30 scientists 347–351 publications: 26 scientists 352–356 publications: 22 scientists 357–361 publications: 29 scientists 362–366 publications: 21 scientists 367–371 publications: 12 scientists 372–376 publications: 18 scientists 377–381 publications: 17 scientists 382–386 publications: 13 scientists 387–391 publications: 21 scientists 392–396 publications: 13 scientists 397–401 publications: 10 scientists 402–406 publications: 15 scientists 407–411 publications: 8 scientists 412–416 publications: 9 scientists 417–421 publications: 8 scientists 422–426 publications: 4 scientists 427–431 publications: 10 scientists 432–436 publications: 10 scientists 437–441 publications: 5 scientists 442–446 publications: 4 scientists 447–451 publications: 10 scientists 452–456 publications: 2 scientists 457–461 publications: 4 scientists 462–466 publications: 7 scientists 467–471 publications: 7 scientists 472–476 publications: 6 scientists 477–481 publications: 6 scientists 482–486 publications: 3 scientists 487–491 publications: 3 scientists 492–496 publications: 4 scientists 497–501 publications: 4 scientists 502–506 publications: 8 scientists 507–511 publications: 5 scientists 512–516 publications: 4 scientists 517–521 publications: 5 scientists 522–526 publications: 4 scientists 527–530 publications: 5 scientists 531+ publications: 100 scientists
37 publications 531+

This scientist: 202 publications — 74th percentile

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

The last bar groups every scientist with 531 publications or more.

John B. Iverson D-index placement in Ecology and Evolution in 2027

The chart shows the D-index (discipline H-index) distribution of Ecology and Evolution scientists ranked by Research.com in 2027. 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: 153 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: 119 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: 27 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: 7 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: 100 scientists
30 D-Index 121+

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 121 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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