World's Best Scientists 2026 revealed!
Robert L. Jefferies

Robert L. Jefferies

D-Index & Metrics

Ecology and Evolution

D-Index
64
Citations
10554
World Ranking
1904
National Ranking
119

Robert L. Jefferies 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 Robert L. Jefferies 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: 114 publications — 28th percentile

28% of scientists in this discipline score the same or lower.

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

Robert L. Jefferies 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 Robert L. Jefferies 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: 64 D-Index — 78th percentile

78% of scientists in this discipline score the same or lower.

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

Overview

Robert L. Jefferies was affiliated with the University of Toronto in Canada. Their academic career and research contributions are recorded without specifics regarding recent papers, frequent co-authors, or publication venues. There are no listed publications that provide detailed titles, years, or venues to analyze.

The scientist's work did not have publicly documented book publications or detailed records of research topics and fields of study. Their profile does not include records of awards or distinctions, limiting insight into particular recognitions during their career.

While the full scope of their academic work remains unspecified, the association with the University of Toronto suggests involvement in a research environment consistent with that institution's standards and focus areas.

Best Publications

  • Arctic ecosystems in a changing climate : an ecophysiological perspective

    F.S. Chapin;R.L. Jefferies;J.F. Reynolds;G.R. Shaver

  • Vertebrate Herbivores and Northern Plant Communities: Reciprocal Influences and Responses

    R. L. Jefferies;D. R. Klein;G. R. Shaver

  • Ecological Processes in Coastal Environments

    RL Jefferies;Anthony Davy

  • Increases in the net above-ground primary production of a salt marsh forage grass: a test of the predictions of the herbivore-optimization model.

    D. S. Hik;R. L. Jefferies

  • Destruction of wetland habitats by lesser snow geese: a keystone species on the west coast of Hudson Bay.

    Richard H. Kerbes;Peter M. Kotanen;Robert L. Jefferies

  • The dynamics of landscape change and snow geese in mid‐continent North America

    Kenneth F. Abraham;Robert L. Jefferies;Ray T. Alisauskas

  • Goose faeces: a source of nitrogen for plant growth in a grazed salt marsh

    D. R. Bazely;R. L. Jefferies

  • RESTORING ENRICHED GRASSLANDS: EFFECTS OF MOWING ON SPECIES RICHNESS, PRODUCTIVITY, AND NITROGEN RETENTION

    John L. Maron;Robert L. Jefferies

  • Soil microbial and nutrient dynamics in a wet Arctic sedge meadow in late winter and early spring

    Kate A. Edwards;Jennifer McCulloch;G. Peter Kershaw;Robert L. Jefferies

  • A POSITIVE FEEDBACK : HERBIVORY, PLANT GROWTH, SALINITY, AND THE DESERTIFICATION OF AN ARCTIC SALT-MARSH

    Diane S. Srivastava;R. L. Jefferies

  • Changes in the composition and standing crop of salt-marsh communities in response to the removal of a grazer

    D. R. Bazely;R. L. Jefferies

  • The Genetic Basis of Selective Ion Transport in Plants

    Emanuel Epstein and;R. L. Jefferies

  • A biotic agent promotes large‐scale catastrophic change in the coastal marshes of Hudson Bay

    Unknown

  • POPULATION BIOLOGY OF THE SALT MARSH ANNUAL SALICORNIA EUROPAEA agg.

    R.L. Jefferies;Anthony J. Davy;T. Rudmik

  • Is the decline of soil microbial biomass in late winter coupled to changes in the physical state of cold soils

    Robert L. Jefferies;N. Alan Walker;Kate A. Edwards;Jack Dainty

  • Relationship between vegetation and soil seed banks in an arctic coastal marsh

    E. R. Chang;R. L. Jefferies;T. J. Carleton

  • Foraging geese, vegetation loss and soil degradation in an Arctic salt marsh

    Robert L. Jefferies;Robert F. Rockwell

  • Vegetational development and the effect of geese on vegetation at La Perouse Bay, Manitoba

    R. L. Jefferies;A. Jensen;K. F. Abraham

  • BUSH LUPINE MORTALITY, ALTERED RESOURCE AVAILABILITY, AND ALTERNATIVE VEGETATION STATES

    John L. Maron;Robert L. Jefferies

  • Saltmarsh erosion and restoration in south-east England: squeezing the evidence requires realignment

    Mineke Wolters;Jan P. Bakker;Mark D. Bertness;Robert L. Jefferies

  • The embarrassment of riches: atmospheric deposition of nitrogen and community and ecosystem processes.

    Robert L. Jefferies;John L. Maron

Frequent Co-Authors

Robert F. Rockwell
Robert F. Rockwell American Museum of Natural History
Anthony J. Davy
Anthony J. Davy University of East Anglia
David S. Hik
David S. Hik Simon Fraser University
Lawrence B. Flanagan
Lawrence B. Flanagan University of Lethbridge
Diane S. Srivastava
Diane S. Srivastava University of British Columbia
Peter M. Kotanen
Peter M. Kotanen University of Toronto
Hugh A. L. Henry
Hugh A. L. Henry University of Western Ontario
John L. Maron
John L. Maron University of Montana
Fred Cooke
Fred Cooke Simon Fraser University
Jan P. Bakker
Jan P. Bakker University of Groningen

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Related Online Degrees & Career Pathways

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For those who value a broad, customized educational approach, exploring cheap online interdisciplinary studies degree options may be the ideal choice, allowing integration of courses in biology, policy, communication, and more.

These related online degrees enrich the study of Ecology and Evolution, giving graduates flexibility to pursue varied and rewarding careers.

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