World's Best Scientists 2026 revealed!

D-Index & Metrics

Ecology and Evolution

D-Index
31
Citations
3617
World Ranking
8243
National Ranking
2730

Gerard J. Allan 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 Gerard J. Allan 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: 82 publications — 8th percentile

8% of scientists in this discipline score the same or lower.

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

Gerard J. Allan 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 Gerard J. Allan 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: 31 D-Index — 3rd percentile

3% of scientists in this discipline score the same or lower.

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

Overview

Gerard J. Allan is affiliated with Northern Arizona University in the United States. The research focuses primarily on environmental science and agricultural and biological sciences, with particular attention to nature and landscape conservation, global and planetary change, ecology, plant science, and ecological modeling.

The scientist's work covers a range of topics including plant water relations and carbon dynamics, ecology and vegetation dynamics studies, forest ecology and management, species distribution and climate change, tree-ring climate responses, remote sensing in agriculture, and tree root and stability studies.

Among recent publications are papers such as:

  • Intraspecific Genetic Variation and Species Interactions Contribute to Community Evolution (2020, Annual Review of Ecology Evolution and Systematics)
  • Adaptive trait syndromes along multiple economic spectra define cold and warm adapted ecotypes in a widely distributed foundation tree species (2020, Journal of Ecology)
  • Adaptive capacity in the foundation tree species Populus fremontii: implications for resilience to climate change and non-native species invasion in the American Southwest (2020, Conservation Physiology)
  • Tradeoffs between leaf cooling and hydraulic safety in a dominant arid land riparian tree species (2022, Plant Cell & Environment)
  • Genetic data improves niche model discrimination and alters the direction and magnitude of climate change forecasts (2020, Ecological Applications)

Frequent co-authors include:

  • Thomas G. Whitham
  • Kevin R. Hultine
  • Hillary F. Cooper
  • Catherine A. Gehring
  • Christopher E. Doughty

Common venues for publications are:

  • bioRxiv (Cold Spring Harbor Laboratory)
  • Plant Cell & Environment
  • Journal of Ecology
  • Forests
  • Restoration Ecology

Best Publications

  • From genes to ecosystems: a synthesis of the effects of plant genetic factors across levels of organization

    Joseph K. Bailey;Jennifer A. Schweitzer;Francisco Úbeda;Julia Koricheva

  • Genetically informed ecological niche models improve climate change predictions

    Dana H. Ikeda;Tamara L. Max;Gerard J. Allan;Matthew K. Lau

  • Phylogeographic reconstruction of a bacterial species with high levels of lateral gene transfer

    Talima Pearson;Philip Giffard;Philip Giffard;Stephen Beckstrom-Sternberg;Stephen Beckstrom-Sternberg;Raymond Auerbach;Raymond Auerbach

  • Single nucleotide polymorphisms for assessing genetic diversity in castor bean (Ricinus communis)

    Jeffrey T Foster;Gerard J Allan;Agnes P Chan;Pablo D Rabinowicz;Pablo D Rabinowicz

  • A genetic similarity rule determines arthropod community structure.

    R. K. Bangert;R. J. Turek;B. Rehill;G. M. Wimp

  • Molecular phylogenetic evidence for the geographic origin and classification of Canary Island Lotus (Fabaceae: Loteae).

    G.J. Allan;Javier Francisco-Ortega;Javier Francisco-Ortega;Arnoldo Santos-Guerra;Erin Boerner

  • Genetic structure of a foundation species: scaling community phenotypes from the individual to the region.

    R K Bangert;E V Lonsdorf;E V Lonsdorf;G M Wimp;G M Wimp;S M Shuster

  • Castor bean organelle genome sequencing and worldwide genetic diversity analysis.

    Maximo Rivarola;Jeffrey T. Foster;Agnes P. Chan;Amber L. Williams

  • Climate relicts and their associated communities as natural ecology and evolution laboratories.

    Scott A. Woolbright;Thomas G. Whitham;Catherine A. Gehring;Gerard J. Allan

  • Conservative leaf economic traits correlate with fast growth of genotypes of a foundation riparian species near the thermal maximum extent of its geographic range

    Kevin C. Grady;Daniel C. Laughlin;Sharon M. Ferrier;Thomas E. Kolb

  • The Hawaiian Archipelago is a stepping stone for dispersal in the Pacific: an example from the plant genus Melicope (Rutaceae)

    Danica T. Harbaugh;Warren L. Wagner;Gerard J. Allan;Elizabeth A. Zimmer

  • Genotypic variation in phenological plasticity: reciprocal common gardens reveal adaptive responses to warmer springs but not to fall frost.

    Hillary F. Cooper;Kevin C. Grady;Jacob A. Cowan;Rebecca J. Best

  • Genetic variation in productivity of foundation riparian species at the edge of their distribution: implications for restoration and assisted migration in a warming climate

    Kevin C. Grady;Sharon M. Ferrier;Thomas E. Kolb;Stephen C. Hart

  • TREE HYBRIDIZATION AND GENOTYPIC VARIATION DRIVE CRYPTIC SPECIATION OF A SPECIALIST MITE HERBIVORE

    Luke M. Evans;Gerard J. Allan;Stephen M. Shuster;Scott A. Woolbright

  • Evolution of insular Pacific Pittosporum (Pittosporaceae): origin of the Hawaiian radiation.

    C. E. Gemmill;G. Allan;Warren L. Wagner;Elizabeth Anne Zimmer

  • From genes to geography: a genetic similarity rule for arthropod community structure at multiple geographic scales.

    R. K. Bangert;G. J. Allan;R. J. Turek;G. M. Wimp

  • Bud phenology and growth are subject to divergent selection across a latitudinal gradient in Populus angustifolia and impact adaptation across the distributional range and associated arthropods.

    Luke M. Evans;Sobadini Kaluthota;David W. Pearce;Gerard J. Allan

  • Intraspecific Genetic Variation and Species Interactions Contribute to Community Evolution

    Thomas G. Whitham;Gerard J. Allan;Hillary F. Cooper;Stephen M. Shuster

  • Landscape genetic connectivity in a riparian foundation tree is jointly driven by climatic gradients and river networks.

    Samuel A. Cushman;Tamara Max;Nashelly Meneses;Luke M. Evans

  • Genetic Analysis of the Endangered Island Endemic Malacothamnus fasciculatus (Nutt.) Greene var. nesioticus (Rob.) Kearn. (Malvaceae)

    Susan M. Swensen;Gerard J. Allan;Melanie Howe;Wayne J. Elisens

Frequent Co-Authors

Thomas G. Whitham
Thomas G. Whitham Northern Arizona University
Catherine A. Gehring
Catherine A. Gehring Northern Arizona University
Paul Keim
Paul Keim Northern Arizona University
Joseph K. Bailey
Joseph K. Bailey University of Tennessee at Knoxville
Kevin R. Hultine
Kevin R. Hultine Desert Botanical Garden
Stephen M. Shuster
Stephen M. Shuster Northern Arizona University
Elizabeth A. Zimmer
Elizabeth A. Zimmer National Museum of Natural History
Jacques Ravel
Jacques Ravel University of Maryland, Baltimore
Stephen C. Hart
Stephen C. Hart University of California, Merced
Warren L. Wagner
Warren L. Wagner Smithsonian Institution

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