World's Best Scientists 2026 revealed!

D-Index & Metrics

Ecology and Evolution

D-Index
32
Citations
4482
World Ranking
8045
National Ranking
2670

Mac A. Callaham 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 Mac A. Callaham 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: 105 publications — 22nd percentile

22% of scientists in this discipline score the same or lower.

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

Mac A. Callaham 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 Mac A. Callaham 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: 32 D-Index — 5th percentile

5% of scientists in this discipline score the same or lower.

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

Overview

Mac A. Callaham is affiliated with the US Forest Service in the United States. Their research primarily focuses on environmental science, with a significant body of work in agricultural and biological sciences. Key subfields of their study include ecology, evolution, behavior and systematics, global and planetary change, insect science, and nature and landscape conservation.

The main topics addressed in Callaham's research span several ecological and environmental areas. These include fire effects on ecosystems, invertebrate taxonomy and ecology, forest ecology and biodiversity studies, ecology and vegetation dynamics studies, rangeland and wildlife management, study of mite species, and atmospheric chemistry and aerosols.

Callaham has contributed to multiple scientific publications, with frequent appearances in venues such as ACS ES&T Air, Zootaxa, Forest Service Research Data Archive, Ecological Applications, and Ecosphere. This reflects a diverse dissemination of their research across different environmental and ecological journals.

Recent papers authored or co-authored by Callaham illustrate a focus on earthworm ecology, fire ecology, and microbial interactions within ecosystems. Notable works include:

  • The second wave of earthworm invasions in North America: biology, environmental impacts, management and control of invasive jumping worms (2021, Biological Invasions)
  • Benefit or Liability? The Ectomycorrhizal Association May Undermine Tree Adaptations to Fire After Long-term Fire Exclusion (2020, Ecosystems)
  • Gut microbial communities and their potential roles in cellulose digestion and thermal adaptation of earthworms (2023, The Science of The Total Environment)
  • A spatially explicit model of tree leaf litter accumulation in fire maintained longleaf pine forests of the southeastern US (2023, Ecological Modelling)
  • Tools for monitoring and study of peregrine pheretimoid earthworms (Megascolecidae) (2020, Pedobiologia)

Callaham has collaborated with several frequent co-authors, indicating ongoing research partnerships. These co-authors include Melanie K. Taylor, E. Louise Loudermilk, Joseph J. O'Brien, Bruce A. Snyder, and S. Flanagan.

Best Publications

  • Global distribution of earthworm diversity

    Helen R P Phillips;Carlos A Guerra;Marie L C Bartz;Maria J I Briones

  • Pandora's Box Contained Bait : The Global Problem of Introduced Earthworms

    Paul F. Hendrix;Mac A. Callaham;John M. Drake;Ching-Yu Huang

  • Long-Term Soil Experiments: Keys to Managing Earth's Rapidly Changing Ecosystems

    Daniel De B. Richter;Michael Hofmockel;Mac A. Callaham;David S. Powlson

  • Integrating Soil Ecological Knowledge into Restoration Management

    Liam Heneghan;Susan P. Miller;Sara Baer;Mac A. Callaham

  • Soil fauna responses to natural disturbances, invasive species, and global climate change: Current state of the science and a call to action

    David R. Coyle;Uma J. Nagendra;Melanie K. Taylor;J. Holly Campbell

  • Invasion of exotic earthworms into ecosystems inhabited by native earthworms

    P. F. Hendrix;G. H. Baker;M. A. Callaham;G. A. Damoff

  • Annual fire and mowing alter biomass, depth distribution, and C and N content of roots and soil in tallgrass prairie

    Duane J. Kitchen;John M. Blair;Mac A. Callaham

  • Macroinvertebrates in North American tallgrass prairie soils: effects of fire, mowing, and fertilization on density and biomass

    M.A. Callaham;J.M. Blair;T.C. Todd;D.J. Kitchen

  • Soil fungal communities respond compositionally to recurring frequent prescribed burning in a managed southeastern US forest ecosystem

    Alena K. Oliver;Mac A. Callaham;Ari Jumpponen

  • Spatial variability of an invasive earthworm (Amynthas agrestis) population and potential impacts on soil characteristics and millipedes in the Great Smoky Mountains National Park, USA

    Bruce A. Snyder;Bruce A. Snyder;Mac A. Callaham;Paul F. Hendrix

  • Long-term land-use effects on soil invertebrate communities in Southern Piedmont soils, USA

    M.A. Callaham;D.D. Richter;D.C. Coleman;M. Hofmockel

  • Polymerase matters: non-proofreading enzymes inflate fungal community richness estimates by up to 15 %

    Alena K. Oliver;Shawn P. Brown;Mac A. Callaham;Ari Jumpponen

  • Comparison of soil organic matter dynamics at five temperate deciduous forests with physical fractionation and radiocarbon measurements

    Karis J. McFarlane;Margaret S. Torn;Paul J. Hanson;Rachel C. Porras

  • Interactions among overstory structure, seedling life-history traits and fire in frequently burned neotropical pine forests

    Joseph J. O'Brien;J. Kevin Hiers;Mac A. Callaham;Robert J. Mitchell

  • Relative abundance and seasonal activity of earthworms (Lumbricidae and Megascolecidae) as determined by hand-sorting and formalin extraction in forest soils on the southern Appalachian Piedmont

    M.A. Callaham;P.F. Hendrix

  • Policy and management responses to earthworm invasions in North America

    Mac A. Callaham;Grizelle González;Cynthia M. Hale;Liam Heneghan

  • Deep Ion Torrent sequencing identifies soil fungal community shifts after frequent prescribed fires in a southeastern US forest ecosystem

    Shawn Paul Brown;Mac A. Callaham;Alena K. Oliver;Ari M. Jumpponen

  • Occurrence of an exotic earthworm ( Amynthas agrestis ) in undisturbed soils of the southern Appalachian Mountains, USA

    Mac. A. Callaham;Paul F. Hendrix;Ross J. Phillips

  • Feeding ecology and emergence production of annual cicadas (Homoptera: Cicadidae) in tallgrass prairie.

    Mac A. Callaham;Matt R. Whiles;Clinton K. Meyer;Brent L. Brock

  • Response of soil microbial community composition and function to a bottomland forest restoration intensity gradient

    Michael S. Strickland;Michael S. Strickland;Mac A. Callaham;Emile S. Gardiner;John A. Stanturf

  • A striking profile: Soil ecological knowledge in restoration management and science

    Mac A. Callaham;Charles C. Rhoades;Liam Heneghan

Frequent Co-Authors

Paul F. Hendrix
Paul F. Hendrix University of Georgia
Joseph J. O'Brien
Joseph J. O'Brien US Forest Service
David C. Coleman
David C. Coleman University of Georgia
Daniel Richter
Daniel Richter Duke University
Samuel W. James
Samuel W. James Maharishi International University
John M. Blair
John M. Blair Kansas State University
J. Kevin Hiers
J. Kevin Hiers Texas A&M University
Matt R. Whiles
Matt R. Whiles University of Florida
George G. Brown
George G. Brown Brazilian Agricultural Research Corporation
Daniel Markewitz
Daniel Markewitz University of Georgia

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