World's Best Scientists 2026 revealed!

D-Index & Metrics

Ecology and Evolution

D-Index
43
Citations
7400
World Ranking
5304
National Ranking
1812

James D. Ackerman 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 D. Ackerman sits on this spectrum.

37–46 publications: 11 scientists 47–56 publications: 41 scientists 57–66 publications: 147 scientists 67–76 publications: 219 scientists 77–86 publications: 409 scientists 87–96 publications: 467 scientists 97–106 publications: 613 scientists 107–116 publications: 585 scientists 117–126 publications: 591 scientists 127–136 publications: 567 scientists 137–146 publications: 535 scientists 147–156 publications: 481 scientists 157–166 publications: 404 scientists 167–176 publications: 338 scientists 177–186 publications: 362 scientists 187–196 publications: 309 scientists 197–206 publications: 246 scientists 207–216 publications: 223 scientists 217–226 publications: 205 scientists 227–236 publications: 167 scientists 237–246 publications: 141 scientists 247–256 publications: 150 scientists 257–266 publications: 125 scientists 267–276 publications: 113 scientists 277–286 publications: 92 scientists 287–296 publications: 81 scientists 297–306 publications: 77 scientists 307–316 publications: 64 scientists 317–326 publications: 47 scientists 327–336 publications: 58 scientists 337–346 publications: 52 scientists 347–356 publications: 48 scientists 357–366 publications: 50 scientists 367–376 publications: 30 scientists 377–386 publications: 30 scientists 387–396 publications: 34 scientists 397–406 publications: 25 scientists 407–416 publications: 17 scientists 417–426 publications: 12 scientists 427–436 publications: 20 scientists 437–446 publications: 9 scientists 447–456 publications: 12 scientists 457–466 publications: 11 scientists 467–476 publications: 13 scientists 477–486 publications: 10 scientists 487–496 publications: 7 scientists 497–506 publications: 12 scientists 507–516 publications: 10 scientists 517–526 publications: 9 scientists 527–532 publications: 6 scientists 533+ publications: 100 scientists
37 publications 533+

This scientist: 126 publications — 37th percentile

37% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 533 publications or more.

James D. Ackerman 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 D. Ackerman 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: 152 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: 120 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: 28 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: 8 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: 3 scientists 122+ D-Index: 99 scientists
30 D-Index 122+

This scientist: 43 D-Index — 38th percentile

38% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 122 D-Index or more.

Overview

James D. Ackerman is affiliated with the University of Puerto Rico in the United States. Their body of work spans several fields including Agricultural and Biological Sciences, Biochemistry, Genetics and Molecular Biology, and Environmental Science. Within these domains, their research touches upon subfields such as Ecology, Evolution, Behavior and Systematics, Plant Science, Molecular Biology, Nature and Landscape Conservation, and Ecological Modeling.

The scientist's main topics of study include Plant and Animal Studies, Plant Parasitism and Resistance, Ecology and Vegetation Dynamics Studies, Plant and Fungal Species Descriptions, Species Distribution and Climate Change, Plant Diversity and Evolution, and Insect and Pesticide Research.

Among recent publications authored or coauthored by James D. Ackerman are:

  • Beyond the Various Contrivances by Which Orchids Are Pollinated: Global Patterns in Orchid Pollination Biology (2023, Botanical Journal of the Linnean Society)
  • The Origin and Speciation of Orchids (2024, New Phytologist)
  • Island Biogeography of Native and Alien Plant Species: Contrasting Drivers of Diversity Across the Lesser Antilles (2020, Diversity and Distributions)
  • Alien Species Affect the Abundance and Richness of Native Species in Tropical Forests: The Role of Adaptive Strategies (2022, Ecosphere)
  • Trick or Treat? Pollinator Attraction in Vanilla pompona (Orchidaceae) (2021, Biotropica)

Frequent coauthors contributing to the research collaborations with Ackerman include Raymond L. Tremblay, Adam P. Karremans, Diego Bogarín, Oscar A. Pérez-Escobar, and Ryan D. Phillips.

The scientist has published multiple articles in high-profile venues such as Biological Invasions, Zenodo (CERN European Organization for Nuclear Research), Lankesteriana, Diversity and Distributions, and bioRxiv (Cold Spring Harbor Laboratory).

Best Publications

  • Variation in sexual reproduction in orchids and its evolutionary consequences: a spasmodic journey to diversification

    Raymond L. Tremblay;James D. Ackerman;Jess K. Zimmerman;Ricardo N. Calvo

  • Diversity and host specificity of endophytic Rhizoctonia-like fungi from tropical orchids

    J. Tupac Otero;James D. Ackerman;Paul Bayman

  • SHORT- AND LONG-TERM LIMITATIONS TO FRUIT PRODUCTION IN A TROPICAL ORCHID'

    James D. Ackerman;Arlee M. Montalvo

  • Long-term ecology of euglossine orchid-bees (Apidae: Euglossini) in Panama.

    D. W. Roubik;J. D. Ackerman

  • Specificity and mutual dependency of the orchid‐euglossine bee interaction

    J. D. Ackerman

  • Differences in mycorrhizal preferences between two tropical orchids

    J. Tupac Otero;James D. Ackerman;Paul Bayman

  • Limitations to Fruit Production in Ionopsis utricularioides (Orchidaceae)

    Arlee M. Montalvo;James D. Ackerman

  • DIVERSITY AND SEASONALITY OF MALE EUGLOSSINE BEES (HYMENOPTERA: APIDAE) IN CENTRAL PANAMA'

    James D. Ackerman

  • Seedling establishment in an epiphytic orchid: an experimental study of seed limitation.

    J. D. Ackerman;A. Sabat;J. K. Zimmerman

  • Limitations to Sexual Reproduction in Encyclia krugii (Orchidaceae)

    James D. Ackerman

  • Food-Foraging Behavior of Male Euglossini (Hymenoptera: Apidae): Vagabonds or Trapliners?

    James D. Ackerman;Michael R. Mesler;Karen L. Lu;Arlee M. Montalvo

  • Widespread mycorrhizal specificity correlates to mycorrhizal function in the neotropical, epiphytic orchid Ionopsis utricularioides (Orchidaceae).

    J. Tupac Otero;Nicola S. Flanagan;E. Allen Herre;James D. Ackerman

  • orchid flora of Puerto Rico and the Virgin Islands

    James D. Ackerman

  • Orchid-phorophyte relationships in a forest watershed in Puerto Rico

    Luis E. Migenis;James D. Ackerman

  • Gene flow and effective population size in Lepanthes (Orchidaceae): a case for genetic drift

    Raymond L. Tremblay;James D. Ackerman

  • Geographic and seasonal variation in fragrance choices and preferences of male euglossine bees.

    James D. Ackerman

  • EFFECTS OF DISPLAY SIZE, FLOWERING PHENOLOGY, AND NECTAR AVAILABILITY ON EFFECTIVE VISITATION FREQUENCY IN COMPARETTIA FALCATA (ORCHIDACEAE)

    Javier A. Rodríguez-Robles;Elvia J. Meléndez;James D. Ackerman

  • Variation in mycorrhizal performance in the epiphytic orchid Tolumnia variegata in vitro : the potential for natural selection

    J. Tupac Otero;J. Tupac Otero;Paul Bayman;James D. Ackerman

  • Biogeography of the Antilles based on a parsimony analysis of orchid distributions

    J. Carlos Trejo-Torres;James D. Ackerman

  • Variation in the floral fragrance of Epidendrum ciliare (Orchidaceae)

    Samuel Moya;James D. Ackerman

Frequent Co-Authors

Jess K. Zimmerman
Jess K. Zimmerman University of Puerto Rico
David W. Roubik
David W. Roubik Smithsonian Tropical Research Institute
Lawrence R. Walker
Lawrence R. Walker University of Nevada, Las Vegas
W. Mark Whitten
W. Mark Whitten Florida Museum of Natural History
Salvatore Cozzolino
Salvatore Cozzolino University of Naples Federico II
Bart Muys
Bart Muys KU Leuven
Norris H. Williams
Norris H. Williams University of Florida
Curtis C. Daehler
Curtis C. Daehler University of Hawaii at Manoa
Pavel Kindlmann
Pavel Kindlmann Charles University
Frederick N. Scatena
Frederick N. Scatena University of Pennsylvania

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Related Online Degrees & Career Pathways

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Finally, students seeking flexibility can benefit from online interdisciplinary studies bachelor programs low cost, which allow for a customized curriculum that combines ecology, evolution, and related fields. This approach can prepare graduates for a wide range of roles in research, education, policy, and more.

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