World's Best Scientists 2026 revealed!

D-Index & Metrics

Environmental Sciences

D-Index
45
Citations
6535
World Ranking
6510
National Ranking
289

John C. Roff publication distribution in Environmental Sciences in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Environmental Sciences in 2026. The highlighted bar marks where John C. Roff sits on this spectrum.

41–50 publications: 21 scientists 51–60 publications: 62 scientists 61–70 publications: 133 scientists 71–80 publications: 257 scientists 81–90 publications: 361 scientists 91–100 publications: 440 scientists 101–110 publications: 492 scientists 111–120 publications: 541 scientists 121–130 publications: 617 scientists 131–140 publications: 544 scientists 141–150 publications: 541 scientists 151–160 publications: 539 scientists 161–170 publications: 444 scientists 171–180 publications: 444 scientists 181–190 publications: 400 scientists 191–200 publications: 377 scientists 201–210 publications: 318 scientists 211–220 publications: 283 scientists 221–230 publications: 263 scientists 231–240 publications: 220 scientists 241–250 publications: 217 scientists 251–260 publications: 180 scientists 261–270 publications: 181 scientists 271–280 publications: 155 scientists 281–290 publications: 130 scientists 291–300 publications: 127 scientists 301–310 publications: 130 scientists 311–320 publications: 85 scientists 321–330 publications: 106 scientists 331–340 publications: 80 scientists 341–350 publications: 83 scientists 351–360 publications: 75 scientists 361–370 publications: 69 scientists 371–380 publications: 52 scientists 381–390 publications: 54 scientists 391–400 publications: 56 scientists 401–410 publications: 44 scientists 411–420 publications: 40 scientists 421–430 publications: 36 scientists 431–440 publications: 25 scientists 441–450 publications: 25 scientists 451–460 publications: 32 scientists 461–470 publications: 29 scientists 471–480 publications: 21 scientists 481–490 publications: 26 scientists 491–500 publications: 25 scientists 501–510 publications: 17 scientists 511–520 publications: 18 scientists 521–530 publications: 15 scientists 531–540 publications: 22 scientists 541–550 publications: 12 scientists 551–560 publications: 15 scientists 561–570 publications: 11 scientists 571–580 publications: 19 scientists 581–590 publications: 9 scientists 591–600 publications: 9 scientists 601–610 publications: 7 scientists 611–620 publications: 11 scientists 621–630 publications: 5 scientists 631–640 publications: 5 scientists 641–650 publications: 6 scientists 651–660 publications: 3 scientists 661–670 publications: 3 scientists 671–680 publications: 4 scientists 681–686 publications: 3 scientists 687+ publications: 100 scientists
41 publications 687+

This scientist: 106 publications — 16th percentile

16% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 687 publications or more.

John C. Roff D-index placement in Environmental Sciences in 2026

The chart shows the D-index (discipline H-index) distribution of Environmental Sciences scientists ranked by Research.com in 2026. The highlighted bar marks where John C. Roff sits on this spectrum.

30 D-Index: 12 scientists 31 D-Index: 26 scientists 32 D-Index: 51 scientists 33 D-Index: 88 scientists 34 D-Index: 123 scientists 35 D-Index: 163 scientists 36 D-Index: 206 scientists 37 D-Index: 267 scientists 38 D-Index: 265 scientists 39 D-Index: 275 scientists 40 D-Index: 321 scientists 41 D-Index: 343 scientists 42 D-Index: 305 scientists 43 D-Index: 336 scientists 44 D-Index: 330 scientists 45 D-Index: 348 scientists 46 D-Index: 291 scientists 47 D-Index: 275 scientists 48 D-Index: 272 scientists 49 D-Index: 273 scientists 50 D-Index: 263 scientists 51 D-Index: 232 scientists 52 D-Index: 266 scientists 53 D-Index: 217 scientists 54 D-Index: 199 scientists 55 D-Index: 177 scientists 56 D-Index: 202 scientists 57 D-Index: 204 scientists 58 D-Index: 166 scientists 59 D-Index: 177 scientists 60 D-Index: 166 scientists 61 D-Index: 152 scientists 62 D-Index: 143 scientists 63 D-Index: 150 scientists 64 D-Index: 124 scientists 65 D-Index: 119 scientists 66 D-Index: 120 scientists 67 D-Index: 118 scientists 68 D-Index: 82 scientists 69 D-Index: 98 scientists 70 D-Index: 94 scientists 71 D-Index: 105 scientists 72 D-Index: 74 scientists 73 D-Index: 84 scientists 74 D-Index: 70 scientists 75 D-Index: 67 scientists 76 D-Index: 78 scientists 77 D-Index: 60 scientists 78 D-Index: 59 scientists 79 D-Index: 52 scientists 80 D-Index: 47 scientists 81 D-Index: 38 scientists 82 D-Index: 48 scientists 83 D-Index: 42 scientists 84 D-Index: 42 scientists 85 D-Index: 43 scientists 86 D-Index: 29 scientists 87 D-Index: 37 scientists 88 D-Index: 29 scientists 89 D-Index: 30 scientists 90 D-Index: 34 scientists 91 D-Index: 20 scientists 92 D-Index: 22 scientists 93 D-Index: 17 scientists 94 D-Index: 19 scientists 95 D-Index: 24 scientists 96 D-Index: 21 scientists 97 D-Index: 20 scientists 98 D-Index: 24 scientists 99 D-Index: 17 scientists 100 D-Index: 17 scientists 101 D-Index: 21 scientists 102 D-Index: 25 scientists 103 D-Index: 18 scientists 104 D-Index: 26 scientists 105 D-Index: 19 scientists 106 D-Index: 15 scientists 107 D-Index: 10 scientists 108 D-Index: 13 scientists 109 D-Index: 15 scientists 110 D-Index: 12 scientists 111 D-Index: 8 scientists 112 D-Index: 7 scientists 113 D-Index: 9 scientists 114 D-Index: 6 scientists 115 D-Index: 12 scientists 116 D-Index: 7 scientists 117 D-Index: 8 scientists 118 D-Index: 3 scientists 119 D-Index: 5 scientists 120 D-Index: 7 scientists 121 D-Index: 2 scientists 122 D-Index: 4 scientists 123 D-Index: 8 scientists 124 D-Index: 7 scientists 125+ D-Index: 99 scientists
30 D-Index 125+

This scientist: 45 D-Index — 36th percentile

36% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 125 D-Index or more.

Overview

John C. Roff is affiliated with the University of Guelph in Canada. Their research spans multiple fields including Environmental Science and Biochemistry, Genetics and Molecular Biology. Within these fields, their work covers several subfields such as Genetics, Ecology, Global and Planetary Change, Management, Monitoring, Policy and Law, and Ecology, Evolution, Behavior and Systematics.

The scientist's recent publications include the following:

  • Whole-ocean network design and implementation pathway for Arctic marine conservation, 2024, npj Ocean Sustainability
  • Mechanics of the Prey Capture Technique of the South African Grassland Bolas Spider, Cladomelea akermani, 2022, Insects
  • Lessons from Plants, 2022, African Journal of Range and Forage Science

Frequent co-authors associated with John C. Roff's research include:

  • T. D. James
  • Martin Sommerkorn
  • B. A. Solov'yev
  • Н. Г. Платонов
  • John C. Morrison

The principal publication venues where John C. Roff has contributed are:

  • npj Ocean Sustainability
  • Insects
  • African Journal of Range and Forage Science

Key topics addressed in their work are:

  • Marine animal studies overview
  • Marine and fisheries research
  • Coastal and Marine Management
  • Insect and Arachnid Ecology and Behavior
  • Hemiptera Insect Studies
  • Spider Taxonomy and Behavior Studies

Best Publications

  • Use of focal species in marine conservation and management: a review and critique

    Mark A. Zacharias;John C. Roff

  • High precision microcomputer based measuring system for ecological research

    John C. Roff;Russell R. Hopcroft

  • National frameworks for marine conservation — a hierarchical geophysical approach

    John C. Roff;Mark E. Taylor

  • Geophysical approaches to the classification, delineation and monitoring of marine habitats and their communities

    John C. Roff;Mark E. Taylor;Josh Laughren

  • The measurement of growth and reproductive rates

    J.A. Runge;J.C. Roff

  • Production of tropical copepods in Kingston Harbour, Jamaica : the importance of small species

    R. R. Hopcroft;J. C. Roff;D. Lombard

  • Trout Biomass and Habitat Relationships in Southern Ontario Streams

    James N. Bowlby;John C. Roff

  • The annual cycle of heterotrophic planktonic ciliates in the waters surrounding the Isles of Shoals, Gulf of Maine: an assessment of their trophic role

    D. J. S. Montagnes;D. H. Lynn;J. C. Roff;W. D. Taylor

  • Bacterivory by tropical copepod nauplii: extent and possible significance

    Roff Jc;Turner Jt;Webber Mk;Hopcroft Rr

  • Distribution and zoogeography of planktonic crustaceans and dipterans in glaciated eastern North America

    Unknown

  • Examination of the Carbon Base in Southern Ontario Streams Using Stable Isotopes

    Jordan S. Rosenfeld;John C. Roff

  • A Hierarchical Ecological Approach to Conserving Marine Biodiversity

    Mark A. Zacharias;John C. Roff

  • Zooplankton and zoobenthos communities of selected northern Ontario lakes of different acidities

    Unknown

  • Annual biomass and production of the oceanic copepod community off Discovery Bay, Jamaica

    M. K. Webber;J. C. Roff

  • Effects of acidity on the phytoplankton and primary productivity of selected northern Ontario lakes

    Unknown

  • Size-weight relationships and biomass of tropical neritic copepods off Kingston, Jamaica

    Unknown

  • Size paradigms in copepod communities: a re-examination

    R. R. Hopcroft;R. R. Hopcroft;R. R. Hopcroft;J. C. Roff;F. P. Chavez

  • Copepod Production on the Scotian Shelf based on Life-History Analyses and Laboratory Bearings

    Ian A. McLaren;M. John Tremblay;C. J. Corkett;John C. Roff

  • Zooplankton growth rates : the influence of female size and resources on egg production of tropical marine copepods

    R. R. Hopcroft;J. C. Roff

  • Universal multifractals and ocean patchiness: phytoplankton, physical fields and coastal heterogeneity

    S. Lovejoy;W. J. S. Currie;Y. Tessier;M. R. Claereboudt

  • A synthesis of growth rates in marine epipelagic invertebrate zooplankton.

    A.G. Hirst;J.C. Roff;R.S. Lampitt

  • Zooplankton growth rates : extraordinary production by the larvacean Oikopleura dioica in tropical waters

    Russell R. Hopcroft;John C. Roff

  • Annual structure of the copepod community and its associated pelagic environment off Discovery Bay, Jamaica

    M. K. Webber;J. C. Roff

  • Production of tropical larvaceans in Kingston Harbour, Jamaica: are we ignoring an important secondary producer?

    Russell R. Hopcroft;John C. Roff

  • Zooplankton growth rates: the larvaceans Appendicularia, Fritillaria and Oikopleura in tropical waters

    Russell R. Hopcroft;John C. Roff;Heather A. Bouman

Frequent Co-Authors

Russell R. Hopcroft
Russell R. Hopcroft University of Alaska Fairbanks
Edwin Bourget
Edwin Bourget Université Laval
John S. Gray
John S. Gray University of Oslo
Paul J. B. Hart
Paul J. B. Hart University of Leicester
Philippe Archambault
Philippe Archambault Université Laval
Howard I. Browman
Howard I. Browman Norwegian Institute of Marine Research
Denis H. Lynn
Denis H. Lynn University of British Columbia
Patricia A. Tester
Patricia A. Tester Ocean Tester LLC
Daniel Schertzer
Daniel Schertzer École des Ponts ParisTech
Shaun Lovejoy
Shaun Lovejoy McGill University

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For those aiming at leadership roles in environmental policy or public administration, completing a specialized program, such as a one year MPA, can accelerate career growth by honing management skills relevant to sustainable development and environmental governance.

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