World's Best Scientists 2026 revealed!

D-Index & Metrics

Ecology and Evolution

D-Index
48
Citations
12188
World Ranking
4148
National Ranking
1445

Timothy G. O'Brien 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 Timothy G. O'Brien 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: 111 publications — 26th percentile

26% of scientists in this discipline score the same or lower.

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

Timothy G. O'Brien 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 Timothy G. O'Brien 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: 48 D-Index — 51st percentile

51% of scientists in this discipline score the same or lower.

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

Overview

Timothy G. O'Brien is affiliated with the Wildlife Conservation Society in the United States. Their research primarily focuses on environmental science with particular emphasis on ecology and wildlife conservation.

The main topics covered in their work include:

  • Wildlife Ecology and Conservation
  • Primate Behavior and Ecology
  • Species Distribution and Climate Change
  • Human-Animal Interaction Studies
  • Bat Biology and Ecology Studies
  • Business Law and Ethics
  • Sports, Gender, and Society

O'Brien has contributed frequently to the field of ecology, with subfields of study involving ecology, social psychology, ecological modeling, evolution behavior and systematics, and genetics.

Their publications have appeared in several venues, most often in:

  • College Athletics and the Law
  • Mammal Review
  • Conservation Science and Practice
  • Remote Sensing in Ecology and Conservation
  • Ecology

Notable recent papers authored by or involving O'Brien include:

  • "A disconnect between upslope shifts and climate change in an Afrotropical bird community" (2020), published in Conservation Science and Practice
  • "Spatial patterns of large African cats: a large-scale study on density, home range size, and home range overlap of lions Panthera leo and leopards Panthera pardus" (2023), published in Mammal Review
  • "On the scaling of activity in tropical forest mammals" (2020), published in Oikos
  • "Long-term effects of forest fire on habitat use by siamangs in Southern Sumatra" (2020), published in Animal Conservation
  • "Estimating animal density using the Space-to-Event model and bootstrap resampling with motion-triggered camera-trap data" (2023), published in Remote Sensing in Ecology and Conservation

O'Brien has collaborated frequently with several researchers, including:

  • Margaret F. Kinnaird
  • Patrick A. Jansen
  • Oliver R. Wearn
  • Vilis O. Nams
  • Daniel M. Parker

Best Publications

  • Positive biodiversity-productivity relationship predominant in global forests

    Jingjing Liang;Thomas W. Crowther;Nicolas Picard;Susan Wiser

  • Crouching tigers, hidden prey: Sumatran tiger and prey populations in a tropical forest landscape

    Timothy G. O'Brien;Margaret F. Kinnaird;Hariyo T. Wibisono

  • The use of photographic rates to estimate densities of tigers and other cryptic mammals

    Chris Carbone;S. Christie;K. Conforti;T. Coulson

  • Satellite remote sensing for applied ecologists: opportunities and challenges

    Nathalie Pettorelli;William F. Laurance;Timothy G. O'Brien;Martin Wegmann

  • Community structure and diversity of tropical forest mammals: data from a global camera trap network.

    Jorge A. Ahumada;Carlos E. F. Silva;Krisna Gajapersad;Chris Hallam

  • Deforestation Trends in a Tropical Landscape and Implications for Endangered Large Mammals

    Margaret F. Kinnaird;Eric W. Sanderson;T. Timothy G. O'brien;Hariyo T. Wibisono

  • Recommended guiding principles for reporting on camera trapping research

    P. D. Meek;G. Ballard;A. Claridge;A. Claridge;R. Kays;R. Kays

  • The Fate of Wild Tigers

    Eric Dinerstein;Colby Loucks;Eric Wikramanayake;Joshua Ginsberg

  • Life after logging: reconciling wildlife conservation and production forestry in Indonesian Borneo

    E. Meijaard;Douglas Sheil;Robert Nasi;D. Augeri

  • Behavior, diet, and movements of the Sulawesi crested black macaque (Macaca nigra)

    Timothy G. O'Brien;Margaret F. Kinnaird

  • Carbon storage in tropical forests correlates with taxonomic diversity and functional dominance on a global scale

    Kyle C. Cavanaugh;Kyle C. Cavanaugh;J. Stephen Gosnell;Samantha L. Davis;Jorge Ahumada

  • Ecological Effects of Wildfire on Lowland Rainforest in Sumatra

    Margaret F. Kinnaird;Timothy G. O’Brien

  • Standardized Assessment of Biodiversity Trends in Tropical Forest Protected Areas: The End Is Not in Sight

    Lydia Beaudrot;Jorge A. Ahumada;Timothy O'Brien;Patricia Alvarez-Loayza

  • What's so special about figs?

    Timothy G. O'Brien;Margaret F. Kinnaird;Ellen S. Dierenfeld;Nancy L. Conklin-Brittain

  • Abundance, Density and Relative Abundance: A Conceptual Framework

    Timothy G. O’Brien

  • The Wildlife Picture Index: monitoring top trophic levels

    T. G. O'Brien;J. E. M. Baillie;L. Krueger;M. Cuke;M. Cuke

  • Effects of Private-Land Use, Livestock Management, and Human Tolerance on Diversity, Distribution, and Abundance of Large African Mammals

    Margaret F. Kinnaird;Timothy G. O'brien

  • A picture is worth a thousand words: the application of camera trapping to the study of birds

    Timothy G. O'Brien;Margaret F. Kinnaird

  • Wildlife Insights: A Platform to Maximize the Potential of Camera Trap and Other Passive Sensor Wildlife Data for the Planet

    Jorge A Ahumada;Eric Fegraus;Tanya Birch;Nicole Flores

  • Population Fluctuation in Sulawesi Red-Knobbed Hornbills: Tracking Figs in Space and Time

    Margaret F. Kinnaird;Timothy G. O'Brien;Suer Suryadi

  • Ecotourism in the Tangkoko DuaSudara Nature Reserve: opening Pandora' box?

    Margaret F. Kinnaird;Timothy G. O'Brien

Frequent Co-Authors

Margaret F. Kinnaird
Margaret F. Kinnaird Wildlife Conservation Society
Patrick A. Jansen
Patrick A. Jansen Wageningen University & Research
Douglas Sheil
Douglas Sheil Wageningen University & Research
Francesco Rovero
Francesco Rovero University of Florence
Roland Kays
Roland Kays North Carolina State University
Eric W. Sanderson
Eric W. Sanderson Wildlife Conservation Society
Sandy J. Andelman
Sandy J. Andelman Conservation International
Peter Leimgruber
Peter Leimgruber Smithsonian Conservation Biology Institute
Matthew Linkie
Matthew Linkie Wildlife Conservation Society

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Related Online Degrees & Career Pathways

Exploring Ecology and Evolution in the USA opens doors to a variety of academic and career options. Some students may choose to expand their expertise through online learning, which offers flexibility without sacrificing quality.

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Combining ecology with online degrees in related fields can unlock diverse and impactful career pathways in both science and the broader community.

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