World's Best Scientists 2026 revealed!

D-Index & Metrics

Ecology and Evolution

D-Index
93
Citations
43328
World Ranking
380
National Ranking
56

John R. Krebs 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 John R. Krebs 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: 219 publications — 79th percentile

79% of scientists in this discipline score the same or lower.

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

John R. Krebs 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 John R. Krebs 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: 93 D-Index — 96th percentile

96% of scientists in this discipline score the same or lower.

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

Overview

John R. Krebs is affiliated with the University of Oxford in the United Kingdom. Their research primarily focuses on the field of Medicine, with significant contributions across several subfields including Public Health, Environmental and Occupational Health, Physiology, Oncology, Pediatrics, Perinatology and Child Health, and Genetics.

The scientist's work covers a variety of topics, notably in Nutritional Studies and Diet, Diet and Metabolism Studies, Colorectal Cancer Screening and Detection, Nutrition and Health in Aging, Cancer Risks and Factors, Consumer Attitudes and Food Labeling, and Cancer Survivorship and Care.

Recent publications by John R. Krebs center predominantly on colorectal cancer prognosis and related lifestyle and dietary factors. These include:

  • Post-diagnosis physical activity and sedentary behaviour and colorectal cancer prognosis: A Global Cancer Update Programme (CUP Global) systematic literature review and meta-analysis, 2024, International Journal of Cancer
  • Dietary-Lifestyle Patterns and Colorectal Cancer Risk: Global Cancer Update Programme (CUP Global) Systematic Literature Review, 2025, American Journal of Clinical Nutrition
  • Post-diagnosis dietary factors, supplement use and colorectal cancer prognosis: A Global Cancer Update Programme (CUP Global) systematic literature review and meta-analysis, 2024, International Journal of Cancer
  • Post-diagnosis adiposity, physical activity, sedentary behaviour, dietary factors, supplement use and colorectal cancer prognosis: Global Cancer Update Programme (CUP Global) summary of evidence grading, 2024, International Journal of Cancer
  • Post-diagnosis adiposity and colorectal cancer prognosis: A Global Cancer Update Programme (CUP Global) systematic literature review and meta-analysis, 2024, International Journal of Cancer

John R. Krebs frequently collaborates with several coauthors. Notable frequent collaborators include:

  • Ellen Copson
  • Monica L. Baskin
  • Rajiv Chowdhury
  • L. Robert Hill
  • Jacob C. Seidell

The majority of publications are found in these journals:

  • International Journal of Cancer
  • American Journal of Clinical Nutrition
  • Journal of Environmental Management
  • Nature
  • Historical Records of Australian Science

Their research outputs highlight a strong engagement with cancer-related studies, nutritional epidemiology, and public health, particularly focusing on lifestyle factors affecting colorectal cancer prognosis. The combination of frequent collaborations and publication in high-impact journals indicates ongoing involvement in multidisciplinary scientific efforts within their areas of study.

Best Publications

  • An introduction to behavioural ecology

    J. R. Krebs;N. B. Davies

  • Behavioural Ecology : An Evolutionary Approach

    J. R. Krebs;N. B. Davies

  • Arms races between and within species.

    Richard Dawkins;John Richard Krebs

  • Animal signals: information or manipulation?

    R. Dawkins;J. R. Krebs

  • The second Silent Spring

    John R. Krebs;Jeremy D. Wilson;Richard B. Bradbury;Gavin M. Siriwardena

  • Territory and Breeding Density in the Great Tit, Parus Major L.

    John R. Krebs

  • Hippocampal specialization of food-storing birds

    J R Krebs;D F Sherry;S D Healy;V H Perry

  • Test of optimal sampling by foraging great tits

    John R. Krebs;Alejandro Kacelnik;Peter Taylor

  • Hunting by expectation or optimal foraging: A study of patch use by chickadees

    John R. Krebs;John C. Ryan;Eric L. Charnov

  • ON CLUTCH‐SIZE AND FITNESS

    Eric L. Charnov;John R. Krebs

  • Optimal prey selection in the great tit (Parus major)

    John R. Krebs;Jonathan T. Erichsen;Michael I. Webber;Eric L. Charnov

  • Colonial Nesting and Social Feeding as Strategies for Exploiting Food Resources in the Great Blue Heron (Ardea Herodias)

    John R. Krebs

  • Territorial defence in the great tit (Parus major): Do residents always win?

    John R. Krebs

  • FLOCKING AND FEEDING IN THE GREAT TIT PARUS MAJOR–AN EXPERIMENTAL STUDY

    John R. Krebs;Michael H. MacRoberts;J. M. Cullen

  • Song repertoires and territory defence in the great tit

    John Krebs;Ruth Ashcroft;Mike Webber

  • Perspectives in ornithology: Perspectives in optimal foraging

    John R. Krebs;David W. Stephens;William J. Sutherland;J. P. Myers

  • How marsh tits find their hoards: the roles of site preference and spatial memory

    Sara J. Shettleworth;John R. Krebs

  • Relations between Song Repertoire Size and the Volume of Brain Nuclei Related to Song: Comparative Evolutionary Analyses amongst Oscine Birds

    Timothy J. Devoogd;John Richard Krebs;Susan D. Healy;Andy Purvis

  • Geographical variation in the song of the great tit parus major in relation to ecological factors

    Malcolm L. Hunter;John R. Krebs

  • An introduction to behavioural ecology, 2nd ed.

    John R. Krebs;Nicholas B. Davies;Jan Parr

  • Memory for spatial and object-specific cues in food-storing and non-storing birds

    N. S. Clayton;J. R. Krebs

  • Book reviewDeception: Perspectives on Human and Nonhuman Deceit, Robert W. Mitchell, Nicholas S. Thompson (Eds.), State University of New York Press, New York (1986), p. xxix

    John R. Krebs

Frequent Co-Authors

Susan D. Healy
Susan D. Healy University of St Andrews
Mark J. Whittingham
Mark J. Whittingham Newcastle University
Alejandro Kacelnik
Alejandro Kacelnik University of Oxford
Jeremy D. Wilson
Jeremy D. Wilson Royal Society for the Protection of Birds
Peter K. McGregor
Peter K. McGregor Cornwall College
Jonathan T. Erichsen
Jonathan T. Erichsen Cardiff University
Sara J. Shettleworth
Sara J. Shettleworth University of Toronto
Richard B. Bradbury
Richard B. Bradbury University of Cambridge
Nicola S. Clayton
Nicola S. Clayton University of Cambridge
Daniel M. Weary
Daniel M. Weary University of British Columbia

If you think any of the details on this page are incorrect, let us know.

Report an issue

We appreciate your kind effort to assist us to improve this page, it would be helpful providing us with as much detail as possible in the text box below:

Related Online Degrees & Career Pathways

Studying Ecology and Evolution opens doors to a variety of academic and professional avenues. Many students combine this area with other interests to expand their career options. For instance, those interested in community outreach or advocacy might consider online schools for human services to gain skills relevant for non-profits, government, or health-related sectors.

Others may be drawn to educational roles, where understanding what is an slp in education (Speech-Language Pathologist) can be valuable, especially for those who might teach or support students with diverse communication needs.

If you're passionate about designing sustainable environments or wildlife habitats, pursuing an architecture degree online can offer new perspectives and opportunities. Alternatively, strong analytical and quantitative skills from a math degree online can complement research work, data analysis, and modeling in ecological and evolutionary fields.

Exploring these related online degrees can help you carve a career pathway that aligns with your interests in Ecology and Evolution, broadening your impact and expertise.

Best Scientists Citing John R. Krebs

Trending Scientists

Recently Published Articles