World's Best Scientists 2026 revealed!

D-Index & Metrics

Ecology and Evolution

D-Index
83
Citations
34046
World Ranking
696
National Ranking
256

James L. Hamrick 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 James L. Hamrick 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: 240 publications — 83rd percentile

83% of scientists in this discipline score the same or lower.

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

James L. Hamrick 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 James L. Hamrick 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: 83 D-Index — 92nd percentile

92% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 121 D-Index or more.

Research.com Recognitions

  • 1989 - Fellow of the American Association for the Advancement of Science (AAAS)

Overview

James L. Hamrick is affiliated with the University of Georgia in the United States. Their research spans several fields within biological sciences, particularly focusing on genetics, ecology, and conservation biology.

The main fields of study in their work are:

  • Biochemistry, Genetics and Molecular Biology
  • Agricultural and Biological Sciences
  • Environmental Science

Subfields in which they have published include:

  • Genetics
  • Ecology, Evolution, Behavior and Systematics
  • Nature and Landscape Conservation
  • Molecular Biology
  • Ecology

The main research topics covered in their publications are:

  • Genetic diversity and population structure
  • Plant and animal studies
  • Ecology and Vegetation Dynamics Studies
  • Species Distribution and Climate Change
  • Genomics and Phylogenetic Studies
  • Wildlife Ecology and Conservation
  • Identification and Quantification in Food

James L. Hamrick has coauthored multiple papers with several frequent collaborators, including:

  • Dorset W. Trapnell
  • Sung-Won Son
  • Sonia Herrando-Moraira
  • Masayuki Maki
  • Young-Dong Kim

Their recent publications include the following papers:

  • "Incorporating differences between genetic diversity of trees and herbaceous plants in conservation strategies" (2020, Conservation Biology)
  • "Ecological niche modelling and phylogeography reveal range shifts of pawpaw, a North American understorey tree" (2021, Journal of Biogeography)
  • "The role of anthropogenic dispersal in shaping the distribution and genetic composition of a widespread North American tree species" (2021, Ecology and Evolution)
  • "Genetic inference of orchid population dynamics on different-aged lava flows in Costa Rica" (2022, Biotropica)
  • "Changing patterns of genetic differentiation in the slender wild oat, Avena barbata" (2022, Proceedings of the National Academy of Sciences)

The venues where James L. Hamrick has most frequently published include:

  • Conservation Biology
  • Biotropica
  • Journal of Biogeography
  • Ecology and Evolution
  • Proceedings of the National Academy of Sciences

In recognition of their contributions to science, James L. Hamrick was named a Fellow of the American Association for the Advancement of Science (AAAS) in 1989.

Best Publications

  • Effects of life history traits on genetic diversity in plant species

    J. L. Hamrick;M. J. W. Godt

  • ECOLOGICAL DETERMINANTS OF GENETIC STRUCTURE IN PLANT POPULATIONS

    M. D. Loveless;J. L. Hamrick

  • Factors influencing levels of genetic diversity in woody plant species

    J. L. Hamrick;Mary Jo W. Godt;Susan L. Sherman-Broyles

  • Relationships Between Life History Characteristics and Electrophoretically Detectable Genetic Variation in Plants

    J. L. Hamrick;Y. B. Linhart;J. B. Mitton

  • Allozyme polymorphisms detected in mature needle tissue of ponderosa pine

    J. B. Mitton;Y. B. Linhart;K. B. Sturgeon;J. L. Hamrick

  • The influence of seed dispersal mechanisms on the genetic structure of tropical tree populations

    J. L. Hamrick;Darlyne A. Murawski;John D. Nason

  • Reproductive and Genetic Consequences of Forest Fragmentation: Two Case Studies of Neotropical Canopy Trees

    J. D. Nason;J. L. Hamrick

  • Microgeographical Variation in Allozyme Frequencies in Avena barbata

    J. L. Hamrick;R. W. Allard

  • Isozymes and the Analysis of Genetic Structure in Plant Populations

    J. L. Hamrick

  • Reproductive Dominance of Pasture Trees in a Fragmented Tropical Forest Mosaic

    Preston R. Aldrich;J. L. Hamrick

  • The breeding structure of a tropical keystone plant resource

    John D. Nason;E. Allen Herre;J. L. Hamrick

  • The effect of the density of flowering individuals on the mating systems of nine tropical tree species

    D A Murawski;J L Hamrick

  • Allozyme Diversity in Cultivated Crops

    J. L. Hamrick;M. J. W. Godt

  • Microsatellite analysis of demographic genetic structure in fragmented populations of the tropical tree Symphonia globulifera

    Preston R. Aldrich;J. L. Hamrick;Paul Chavarriaga;Gary Kochert

  • POLLEN DISPERSAL IN LOW-DENSITY POPULATIONS OF THREE NEOTROPICAL TREE SPECIES

    Elizabeth A. Stacy;James L. Hamrick;James D. Nason;Stephen P. Hubbell

  • SONORAN DESERT COLUMNAR CACTI AND THE EVOLUTION OF GENERALIZED POLLINATION SYSTEMS

    Theodore H. Fleming;Catherine T. Sahley;J. Nathaniel Holland;Jason D Nason

  • Quantification of genetic diversity at allozyme loci

    E E Berg;J L Hamrick

  • Observations on the genetic structure and mating system of ponderosa pine in the Colorado front range.

    J. B. Mitton;Y. B. Linhart;J. L. Hamrick;J. S. Beckman

  • The Advantage of Mast Years for Wind Pollination

    Unknown

  • Genetic variation in Pueraria lobata (Fabaceae), an introduced, clonal, invasive plant of the southeastern United States.

    Rebecca A. Pappert;J. L. Hamrick;Lisa A. Donovan

  • Conservation Genetics: Case Histories From Nature.

    Andrew Balmford;J. C. Avise;J. L. Hamrick

Frequent Co-Authors

John D. Nason
John D. Nason Iowa State University
Stephen P. Hubbell
Stephen P. Hubbell University of California, Los Angeles
Peter E. Smouse
Peter E. Smouse Rutgers, The State University of New Jersey
Lisa A. Donovan
Lisa A. Donovan University of Georgia
Theodore H. Fleming
Theodore H. Fleming University of Miami
Alejandro Casas
Alejandro Casas National Autonomous University of Mexico
Michael L. Arnold
Michael L. Arnold University of Georgia
Britta Denise Hardesty
Britta Denise Hardesty CSIRO Ocean and Atmosphere
Saara J. DeWalt
Saara J. DeWalt Clemson University
Travis C. Glenn
Travis C. Glenn University of Georgia

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Related Online Degrees & Career Pathways

Building a career in Ecology and Evolution can open doors to many rewarding paths. However, the interdisciplinary nature of this field means that many students look for complementary degrees to expand their expertise. Online education provides a convenient and flexible way to pursue related qualifications, especially when seeking roles that connect ecological understanding with human behavior and community support.

For those interested in the psychological side of conservation or education, a masters in child psychology online can provide specialized skills to work with younger populations on environmental awareness. Alternatively, students keen on guiding communities can consider counseling masters programs online to better support environmental counseling and advocacy.

Those wishing to bridge science and health may find an clinical psychology online degree valuable, especially in roles addressing eco-anxiety or environmental stress. Additionally, organizational and policy work within ecological fields can be advanced through a human services degree online, preparing graduates for impactful, community-focused positions.

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