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Nicholas E. Mandrak

Nicholas E. Mandrak

University of Toronto
Canada

D-Index & Metrics

Ecology and Evolution

D-Index
47
Citations
14514
World Ranking
4330
National Ranking
292

Nicholas E. Mandrak 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 Nicholas E. Mandrak 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: 242 publications — 84th percentile

84% of scientists in this discipline score the same or lower.

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

Nicholas E. Mandrak 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 Nicholas E. Mandrak 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: 47 D-Index — 49th percentile

49% of scientists in this discipline score the same or lower.

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

Overview

Nicholas E. Mandrak is affiliated with the University of Toronto in Canada. Their research focuses primarily on Environmental Science, with extensive contributions to subfields including Ecology, Nature and Landscape Conservation, Global and Planetary Change, Molecular Biology, and Genetics.

Their academic work covers a range of topics, notably:

  • Fish Ecology and Management Studies
  • Aquatic Invertebrate Ecology and Behavior
  • Environmental DNA in Biodiversity Studies
  • Identification and Quantification in Food
  • Wildlife Ecology and Conservation
  • Species Distribution and Climate Change
  • Marine and fisheries research

Mandrak has published in several scholarly venues, with a significant number of publications in:

  • Canadian Journal of Fisheries and Aquatic Sciences
  • Biological Invasions
  • Diversity and Distributions
  • Fisheries
  • FACETS

Among recent papers, the following stand out:

  • "Scientists' warning on invasive alien species," 2020, Biological reviews/Biological reviews of the Cambridge Philosophical Society
  • "Trends in the detection of aquatic non-indigenous species across global marine, estuarine and freshwater ecosystems: A 50-year perspective," 2020, Diversity and Distributions
  • "Knowledge co-production: A pathway to effective fisheries management, conservation, and governance," 2020, Fisheries
  • "Linking genomics and fish conservation decision making: a review," 2020, Reviews in Fish Biology and Fisheries
  • "The International Vertebrate Pet Trade Network and Insights from US Imports of Exotic Pets," 2021, BioScience

Frequent collaborators in Mandrak's research include:

  • Rowshyra A. Castañeda
  • Alexander Van Nynatten
  • D. Andrew R. Drake
  • Thaïs A. Bernos
  • Nathan R. Lovejoy

Best Publications

  • Freshwater Ecoregions of the World: A New Map of Biogeographic Units for Freshwater Biodiversity Conservation

    Robin Abell;Michele L. Thieme;Carmen Revenga;Mark Bryer

  • Scientists' warning on invasive alien species.

    Petr Pyšek;Petr Pyšek;Petr Pyšek;Philip E. Hulme;Dan Simberloff;Sven Bacher

  • Conservation status of imperiled north American freshwater and diadromous fishes

    Howard L. Jelks;Stephen J. Walsh;Noel M. Burkhead;Salvador Contreras‐Balderas

  • Identifying Canadian Freshwater Fishes through DNA Barcodes

    Nicolas Hubert;Robert Hanner;Erling Holm;Nicholas E. Mandrak

  • Global hotspots and correlates of alien species richness across taxonomic groups

    Wayne Dawson;Dietmar Moser;Mark van Kleunen;Mark van Kleunen;Holger Kreft

  • Potential impacts of climate change on the distributions of several common and rare freshwater fishes in Canada

    Cindy Chu;Nicholas E. Mandrak;Charles K. Minns

  • Impacts of alien invasive species on freshwater fauna at risk in Canada.

    Alan J. Dextrase;Nicholas E. Mandrak

  • When pets become pests: the role of the exotic pet trade in producing invasive vertebrate animals

    Julie L. Lockwood;Dustin J. Welbourne;Christina M. Romagosa;Phillip Cassey

  • Risk Analysis and Bioeconomics of Invasive Species to Inform Policy and Management

    David M. Lodge;David M. Lodge;Paul W. Simonin;Stanley W. Burgiel;Reuben P. Keller

  • Postglacial dispersal of freshwater fishes into Ontario

    Nicholas E. Mandrak;E. J. Crossman

  • PREDICTING OCCURRENCES AND IMPACTS OF SMALLMOUTH BASS INTRODUCTIONS IN NORTH TEMPERATE LAKES

    M. Jake Vander Zanden;Julian D. Olden;James H. Thorne;Nicholas E. Mandrak

  • Trends in the detection of aquatic non‐indigenous species across global marine, estuarine and freshwater ecosystems: A 50‐year perspective

    Sarah A. Bailey;Lyndsay Brown;Marnie L. Campbell;João Canning-Clode

  • Confronting the wicked problem of managing biological invasions

    Darragh J. Woodford;David M. Richardson;Hugh J. MacIsaac;Nicholas E. Mandrak

  • Ecology of Freshwater Baitfish Use in Canada and the United States

    Matthew K. Litvak;Nicholas E. Mandrak;Nicholas E. Mandrak

  • Potential Invasion of the Great Lakes by Fish Species Associated with Climatic Warming

    Nicholas E. Mandrak

  • Knowledge co‐production: A pathway to effective fisheries management, conservation, and governance

    Steven J. Cooke;Vivian M. Nguyen;Jacqueline M. Chapman;Andrea J. Reid;Andrea J. Reid

  • Environmental DNA detection of rare and invasive fish species in two Great Lakes tributaries.

    Katherine D. Balasingham;Ryan P. Walter;Ryan P. Walter;Nicholas E. Mandrak;Nicholas E. Mandrak;Daniel D. Heath

  • Comparative distribution and invasion risk of snakehead (Channidae) and Asian carp (Cyprinidae) species in North America

    Leif-Matthias Herborg;Nicholas E Mandrak;Becky C Cudmore;Hugh J MacIsaac

  • The ROM Field Guide to Freshwater Fishes of Ontario

    Erling Holm;Nicholas E. Mandrak;Mary E. Burridge

  • A Comparison of Methods for Sampling Fish Diversity in Shallow Offshore Waters of Large Rivers

    Nicolas W. R. Lapointe;Lynda D. Corkum;Nicholas E. Mandrak

  • Predicting Invasiveness of Species in Trade: Climate Match, Trophic Guild and Fecundity Influence Establishment and Impact of Non-Native Freshwater Fishes

    Jennifer G. Howeth;Crysta A. Gantz;Paul L. Angermeier;Emmanuel A. Frimpong

  • Preadaptation and Naturalization of Nonnative Species: Darwin's Two Fundamental Insights into Species Invasion.

    Marc W. Cadotte;Sara E. Campbell;Shao-peng Li;Darwin S. Sodhi

Frequent Co-Authors

Daniel D. Heath
Daniel D. Heath University of Windsor
Lynda D. Corkum
Lynda D. Corkum University of Windsor
Nathan R. Lovejoy
Nathan R. Lovejoy University of Toronto
Petr Pyšek
Petr Pyšek Czech Academy of Sciences
Chris C. Wilson
Chris C. Wilson Ministry of Natural Resources and Forestry
Tim M. Blackburn
Tim M. Blackburn University College London
Lauren J. Chapman
Lauren J. Chapman University of Florida
Hugh J. MacIsaac
Hugh J. MacIsaac University of Windsor
Olaf L. F. Weyl
Olaf L. F. Weyl South African Institute for Aquatic Biodiversity
Franz Essl
Franz Essl University of Vienna

External Links

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Related Online Degrees & Career Pathways

Pursuing a degree in Ecology and Evolution opens diverse career opportunities in research, conservation, education, and beyond. For those interested in expanding their qualifications online, a wide range of related degree options are now attainable from accredited U.S. universities.

Many students choose to supplement their science background by enrolling in the best online master's in history programs, which can foster interdisciplinary perspectives valuable for careers in science communication, museum curation, and policy analysis. Alternatively, library and information science is another popular route, with several colleges with library science programs offering specialized training in research management and data stewardship, skills increasingly in demand for environmental and scientific archives.

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Best Scientists Citing Nicholas E. Mandrak

Petr Pyšek

Petr Pyšek

Czech Academy of Sciences

Publications: 61

Julian D. Olden

Julian D. Olden

University of Washington

Publications: 45

Franz Essl

Franz Essl

University of Vienna

Publications: 39

Mark van Kleunen

Mark van Kleunen

University of Konstanz

Publications: 37

Chris C. Wilson

Chris C. Wilson

Ministry of Natural Resources and Forestry

Publications: 36

Robert Hanner

Robert Hanner

University of Guelph

Publications: 36

Steven J. Cooke

Steven J. Cooke

Carleton University

Publications: 32

David M. Lodge

David M. Lodge

Cornell University

Publications: 28

David M. Richardson

David M. Richardson

Stellenbosch University

Publications: 28

Donald A. Jackson

Donald A. Jackson

University of Toronto

Publications: 24

Tim M. Blackburn

Tim M. Blackburn

University College London

Publications: 24

Jonathan M. Jeschke

Jonathan M. Jeschke

Freie Universität Berlin

Publications: 24

Brian Leung

Brian Leung

McGill University

Publications: 24

M. Jake Vander Zanden

M. Jake Vander Zanden

University of Wisconsin–Madison

Publications: 23

Louis Bernatchez

Louis Bernatchez

Université Laval

Publications: 22

Ingolf Kühn

Ingolf Kühn

Helmholtz Centre for Environmental Research

Publications: 22

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