World's Best Scientists 2026 revealed!
Award Badge
Ecology and Evolution
USA
2026

D-Index & Metrics

Ecology and Evolution

D-Index
117
Citations
65604
World Ranking
117
National Ranking
50

Ragan M. Callaway 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 Ragan M. Callaway 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: 353 publications — 95th percentile

95% of scientists in this discipline score the same or lower.

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

Ragan M. Callaway 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 Ragan M. Callaway 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: 117 D-Index — 99th percentile

99% 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

  • 2026 - Research.com Ecology and Evolution in United States Leader Award
  • 2025 - Research.com Ecology and Evolution in United States Leader Award

Overview

Ragan M. Callaway is affiliated with the University of Montana in the United States and is active in research primarily within the fields of Agricultural and Biological Sciences and Environmental Science. Their work spans multiple subfields including Nature and Landscape Conservation, Ecology, Evolution, Behavior and Systematics, Plant Science, Agronomy and Crop Science, and Global and Planetary Change.

Callaway has contributed extensively to topics such as Ecology and Vegetation Dynamics Studies, Plant and Animal Studies, Plant Parasitism and Resistance, Agronomic Practices and Intercropping Systems, Rangeland and Wildlife Management, Species Distribution and Climate Change, and Soil Carbon and Nitrogen Dynamics.

The scientist has published frequently in several key venues with the highest number of publications appearing in Trends in Ecology & Evolution and New Phytologist, each featuring seven of their works. Other common journals include Ecology Letters, Journal of Ecology, and Ecology.

Recent notable papers authored or coauthored by Callaway include:

  • Long-term increased grain yield and soil fertility from intercropping (2021), published in Nature Sustainability
  • Priority effects and ecological restoration (2020), published in Restoration Ecology
  • The Ecological Importance of Allelopathy (2021), published in Annual Review of Ecology Evolution and Systematics
  • Belowground facilitation and trait matching: two or three to tango? (2021), published in Trends in Plant Science
  • Plant litter strengthens positive biodiversity-ecosystem functioning relationships over time (2023), published in Trends in Ecology & Evolution

Frequent collaborators include Long Li, Christopher J. Lortie, Jacob E. Lucero, Weiping Zhang, and Róbert W. Pál, with a notable number of coauthored works ranging from 9 to 15 publications per collaborator.

Best Publications

  • Positive interactions in communities.

    Mark D. Bertness;Ragan Callaway

  • Competition and facilitation: a synthetic approach to interactions in plant communities

    Ragan M. Callaway;Lawrence R. Walker

  • Positive interactions among plants

    Ragan M. Callaway

  • Positive interactions among alpine plants increase with stress.

    Ragan M. Callaway;R. W. Brooker;Philippe Choler;Zaal Kikvidze

  • Facilitation in plant communities: the past, the present, and the future

    Rob W. Brooker;Fernando T. Maestre;Ragan M. Callaway;Christopher L. Lortie

  • Invasive Plants Versus Their New and Old Neighbors: A Mechanism for Exotic Invasion

    Ragan M. Callaway;Erik T. Aschehoug

  • Novel Weapons: Invasive Success and the Evolution of Increased Competitive Ability

    Ragan M. Callaway;Wendy M. Ridenour

  • Allelopathy and Exotic Plant Invasion: From Molecules and Genes to Species Interactions

    Harsh P. Bais;Ramarao Vepachedu;Simon Gilroy;Ragan M. Callaway

  • Refining the stress-gradient hypothesis for competition and facilitation in plant communities

    Fernando T. Maestre;Ragan M. Callaway;Fernando Valladares;Fernando Valladares;Christopher J. Lortie

  • Soil biota and exotic plant invasion.

    Ragan M. Callaway;Giles C. Thelen;Alex Rodriguez;William E. Holben

  • How plants communicate using the underground information superhighway.

    Harsh Pal Bais;Sang-Wook Park;Tiffany L Weir;Ragan M Callaway

  • A biogeographical approach to plant invasions: the importance of studying exotics in their introduced and native range

    José L. Hierro;John L. Maron;Ragan M. Callaway

  • Invasive Plant Suppresses the Growth of Native Tree Seedlings by Disrupting Belowground Mutualisms

    Kristina A Stinson;Stuart A Campbell;Jeff R Powell;Benjamin E Wolfe

  • Positive interactions and interdependence in plant communities

    Ragan M. Callaway

  • Soil biota and invasive plants

    Kurt O. Reinhart;Ragan M. Callaway

  • FACILITATION AND COMPETITION ON GRADIENTS IN ALPINE PLANT COMMUNITIES

    Philippe Choler;Richard Michalet;Ragan M. Callaway

  • Allelopathy and exotic plant invasion

    José L. Hierro;José L. Hierro;Ragan M. Callaway

  • Do biotic interactions shape both sides of the humped-back model of species richness in plant communities?

    Richard Michalet;Robin W. Brooker;Lohengrin A. Cavieres;Zaal Kikvidze

  • Salt Marsh Plant Zonation: The Relative Importance of Competition and Physical Factors

    Steven C. Pennings;Ragan M. Callaway

  • Rethinking plant community theory

    Christopher J. Lortie;Rob W. Brooker;Phillipe Choler;Zaal Kikvidze

  • PHENOTYPIC PLASTICITY AND INTERACTIONS AMONG PLANTS

    Ragan M. Callaway;Steven C. Pennings;Christina L. Richards

Frequent Co-Authors

Richard Michalet
Richard Michalet University of Bordeaux
Christopher J. Lortie
Christopher J. Lortie York University
Zaal Kikvidze
Zaal Kikvidze Ilia State University
John L. Maron
John L. Maron University of Montana
Francisco I. Pugnaire
Francisco I. Pugnaire Spanish National Research Council
Dean E. Pearson
Dean E. Pearson United States Department of Agriculture
Jorge M. Vivanco
Jorge M. Vivanco Colorado State University
Leslie A. Weston
Leslie A. Weston Charles Sturt University
Lohengrin A. Cavieres
Lohengrin A. Cavieres University of Concepción
Rob W. Brooker
Rob W. Brooker James Hutton Institute

If you think any of the details on this page are incorrect, let us know.

Report an issue

We appreciate your kind effort to assist us to improve this page, it would be helpful providing us with as much detail as possible in the text box below:

Related Online Degrees & Career Pathways

Exploring a career in Ecology and Evolution can lead you down a range of diverse academic pathways, especially with the flexibility of online degree options. If you are considering a shift from another field, there are now innovative programs that help non-majors enter specialized areas. For example, speech pathology bridge programs online allow those without an SLP background to transition smoothly into communication sciences.

Healthcare-related fields offer similar online opportunities. If you're thinking about a nursing career, online absn programs for non nurses enable individuals to fast-track to a Bachelor of Science in Nursing, regardless of their undergraduate background. Those interested in advanced practice roles can explore fast track nurse practitioner programs to accelerate their education and launch their careers sooner.

Salary potential is also a key factor when planning your academic journey. For those drawn to psychiatric care, researching how much does a psychiatric nurse practitioner make can provide valuable insight into future earnings by state. Exploring related online degrees and career pathways helps you make an informed decision and paves the way for a successful and rewarding future.

Best Scientists Citing Ragan M. Callaway

Trending Scientists

Recently Published Articles