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Gregory W. Thiemann

Gregory W. Thiemann

York University
Canada

D-Index & Metrics

Ecology and Evolution

D-Index
32
Citations
3627
World Ranking
8115
National Ranking
503

Gregory W. Thiemann 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 Gregory W. Thiemann 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: 81 publications — 7th percentile

7% of scientists in this discipline score the same or lower.

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

Gregory W. Thiemann 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 Gregory W. Thiemann 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

Gregory W. Thiemann is affiliated with York University in Canada and has a research focus primarily within Earth and Planetary Sciences and Environmental Science. Their work extensively covers various aspects of Arctic and marine ecosystems, particularly studying the dynamics and ecology of marine animals in polar regions.

Their research topics include:

  • Marine animal studies overview
  • Arctic and Antarctic ice dynamics
  • Cryospheric studies and observations
  • Arctic and Russian Policy Studies
  • Wildlife Ecology and Conservation
  • Mercury impact and mitigation studies
  • Bat Biology and Ecology Studies

Frequent publication venues for their work feature:

  • Polar Biology
  • Oecologia
  • PLoS ONE
  • Environmental Science & Technology
  • Ecography

Gregory W. Thiemann has co-authored research with several collaborators, including:

  • Steven H. Ferguson
  • Brent G. Young
  • Katie R. N. Florko
  • David J. Yurkowski
  • Karyn D. Rode

Selected recent papers authored or co-authored by Thiemann include:

  • "Contrasting Temporal Patterns of Mercury, Niche Dynamics, and Body Fat Indices of Polar Bears and Ringed Seals in a Melting Icescape," 2020, Environmental Science & Technology
  • "Drivers and consequences of apex predator diet composition in the Canadian Beaufort Sea," 2020, Oecologia
  • "Identifying reliable indicators of fitness in polar bears," 2020, PLoS ONE
  • "Comparing temporal patterns in body condition of ringed seals living within their core geographic range with those living at the edge," 2020, Ecography
  • "Diet composition and body condition of polar bears (Ursus maritimus) in relation to sea ice habitat in the Canadian High Arctic," 2021, Polar Biology

Their research predominantly investigates ecological and environmental patterns related to species such as polar bears and ringed seals, with emphasis on physiological indicators, diet composition, and the impacts of changing sea ice habitats.

Best Publications

  • POLAR BEAR DIETS AND ARCTIC MARINE FOOD WEBS: INSIGHTS FROM FATTY ACID ANALYSIS

    Gregory W. Thiemann;Sara J. Iverson;Ian Stirling

  • Predicting survival, reproduction and abundance of polar bears under climate change.

    Péter K. Molnár;Andrew E. Derocher;Gregory W. Thiemann;Mark A. Lewis

  • Variation in the response of an Arctic top predator experiencing habitat loss: feeding and reproductive ecology of two polar bear populations

    Karyn D. Rode;Eric V. Regehr;David C. Douglas;George M. Durner

  • Migration phenology and seasonal fidelity of an Arctic marine predator in relation to sea ice dynamics

    Seth G. Cherry;Andrew E. Derocher;Gregory W. Thiemann;Nicholas J. Lunn

  • Recent observations of intraspecific predation and cannibalism among polar bears in the southern Beaufort Sea

    Steven C. Amstrup;Ian Stirling;Tom S. Smith;Craig Perham

  • Patterns and consequences of behavioural responses to predators and parasites in Rana tadpoles

    Gregory W. Thiemann;Richard J. Wassersug

  • Conservation status of polar bears (Ursus maritimus) in relation to projected sea-ice declines.

    Eric V. Regehr;Kristin L. Laidre;H. Resit Akçakaya;Steven C. Amstrup

  • Quantitative Support for a Subjective Fatness Index for Immobilized Polar Bears

    Ian Stirling;Gregory W. Thiemann;Evan Richardson

  • Individual patterns of prey selection and dietary specialization in an Arctic marine carnivore

    Gregory W. Thiemann;Sara J. Iverson;Ian Stirling;Martyn E. Obbard

  • Polar bears: proceedings of the 15th Working Meeting of the IUCN/SSC Polar Bear Specialist Group, Copenhagen, Denmark, 29 June3 July 2009

    Martyn E. Obbard;Gregory W. Thiemann;Elizabeth Peacock;Terry D. DeBruyn

  • Rapid ecosystem change and polar bear conservation

    Andrew E. Derocher;Jon Aars;Steven C. Amstrup;Amy Cutting

  • Unusual predation attempts of polar bears on ringed seals in the southern beaufort sea: Possible significance of changing spring ice conditions

    Ian Stirling;Evan Richardson;Gregory W. Thiemann;Andrew E. Derocher

  • Conservation and management of Canada’s polar bears (Ursus maritimus) in a changing Arctic11This review is part of the virtual symposium “Flagship Species – Flagship Problems” that deals with ecology, biodiversity and management issues, and climate impacts on species at risk and of Canadian importance, including the polar bear (Ursus maritimus), Atlantic cod (Gadus morhua), Piping Plover (Charadrius melodus), and caribou (Rangifer tarandus).

    E. Peacock;A. E. Derocher;G. W. Thiemann;I. Stirling;I. Stirling

  • High contributions of sea ice derived carbon in polar bear (Ursus maritimus) tissue.

    Thomas A Brown;Thomas A Brown;Melissa P Galicia;Gregory W Thiemann;Simon T Belt

  • Variation in blubber fatty acid composition among marine mammals in the Canadian Arctic

    Gregory W. Thiemann;Sara J. Iverson;Ian Stirling

  • Quantifying dietary pathways of proteins and lipids to tissues of a marine predator

    Seth G. Cherry;Andrew E. Derocher;Keith A. Hobson;Ian Stirling;Ian Stirling

  • Seasonal, sexual and anatomical variability in the adipose tissue of polar bears (Ursus maritimus)

    GW Thiemann;Sara J. Iverson;I. Stirling

  • VARIABILITY IN THE BLUBBER FATTY ACID COMPOSITION OF RINGED SEALS (PHOCA HISPIDA) ACROSS THE CANADIAN ARCTIC

    Gregory W. Thiemann;Sara J. Iverson;Ian Stirling

  • Using tri-axial accelerometers to identify wild polar bear behaviors

    Anthony M. Pagano;Karyn D. Rode;A. Cutting;M.A. Owen

  • Dietary habits of polar bears in Foxe Basin, Canada: possible evidence of a trophic regime shift mediated by a new top predator

    Melissa P. Galicia;Gregory W. Thiemann;Markus G. Dyck;Steven H. Ferguson

Frequent Co-Authors

Ian Stirling
Ian Stirling University of Alberta
Steven H. Ferguson
Steven H. Ferguson Fisheries and Oceans Canada
Andrew E. Derocher
Andrew E. Derocher University of Alberta
Sara J. Iverson
Sara J. Iverson Dalhousie University
Karyn D. Rode
Karyn D. Rode United States Geological Survey
Jon Aars
Jon Aars Norwegian Polar Institute
Todd C. Atwood
Todd C. Atwood United States Geological Survey
Øystein Wiig
Øystein Wiig University of Oslo
Anuschka Polder
Anuschka Polder Norwegian University of Life Sciences
Derek C. G. Muir
Derek C. G. Muir Environment and Climate Change Canada

External Links

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Related Online Degrees & Career Pathways

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These online degrees not only expand your career potential but also make flexible, affordable education possible, supporting a dynamic career in Ecology, Evolution, and beyond.

Best Scientists Citing Gregory W. Thiemann

Andrew E. Derocher

Andrew E. Derocher

University of Alberta

Publications: 71

Christian Sonne

Christian Sonne

Aarhus University

Publications: 46

Ian Stirling

Ian Stirling

University of Alberta

Publications: 46

Todd C. Atwood

Todd C. Atwood

United States Geological Survey

Publications: 40

Jon Aars

Jon Aars

Norwegian Polar Institute

Publications: 38

Steven H. Ferguson

Steven H. Ferguson

Fisheries and Oceans Canada

Publications: 36

Robert J. Letcher

Robert J. Letcher

Carleton University

Publications: 34

Rune Dietz

Rune Dietz

Aarhus University

Publications: 34

Karyn D. Rode

Karyn D. Rode

United States Geological Survey

Publications: 32

Bjørn Munro Jenssen

Bjørn Munro Jenssen

Norwegian University of Science and Technology

Publications: 30

Kristin L. Laidre

Kristin L. Laidre

University of Washington

Publications: 29

Melissa A. McKinney

Melissa A. McKinney

McGill University

Publications: 26

Erik W. Born

Erik W. Born

University of Alberta

Publications: 26

Øystein Wiig

Øystein Wiig

University of Oslo

Publications: 26

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Steven C. Amstrup

United States Geological Survey

Publications: 24

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Nicholas J. Lunn

Environment and Climate Change Canada

Publications: 23

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