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Ladd E. Johnson

Ladd E. Johnson

Université Laval
Canada

D-Index & Metrics

Ecology and Evolution

D-Index
38
Citations
5550
World Ranking
6641
National Ranking
413

Ladd E. Johnson 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 Ladd E. Johnson 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: 90 publications — 12th percentile

12% of scientists in this discipline score the same or lower.

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

Ladd E. Johnson 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 Ladd E. Johnson 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: 38 D-Index — 23rd percentile

23% of scientists in this discipline score the same or lower.

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

Overview

Ladd E. Johnson is affiliated with Université Laval in Canada and has contributed extensively to research in Earth and Planetary Sciences as well as Environmental Science. Their primary areas of study encompass Oceanography, Ecology, Global and Planetary Change, Ocean Engineering, and fields related to Management, Monitoring, Policy, and Law.

Their scholarly work predominantly focuses on marine and coastal plant biology, marine biology and ecology research, coastal wetland ecosystem dynamics, marine ecology and invasive species, coral and marine ecosystem studies, peatlands and wetlands ecology, and marine biology and environmental chemistry.

Frequent collaborators include Ignacio Garrido, Christopher W. McKindsey, Philippe Archambault, Karen Filbee-Dexter, and Kathleen A. MacGregor, reflecting long-term research partnerships across multiple projects and publications.

Johnson has published primarily in the following scientific venues:

  • Frontiers in Marine Science
  • Elementa Science of the Anthropocene
  • bioRxiv (Cold Spring Harbor Laboratory)
  • Zenodo (CERN European Organization for Nuclear Research)
  • Scientific Reports

Selected recent papers illustrate the scope and impact of Johnson's research:

  • First mussel settlement observed in Antarctica reveals the potential for future invasions, 2020, Scientific Reports
  • Kelp in the Eastern Canadian Arctic: Current and Future Predictions of Habitat Suitability and Cover, 2021, Frontiers in Marine Science
  • Kelp carbon sink potential decreases with warming due to accelerating decomposition, 2022, PLoS Biology
  • Bacterial Communities Show Algal Host (Fucus spp.)/Zone Differentiation Across the Stress Gradient of the Intertidal Zone, 2020, Frontiers in Microbiology
  • The microbiome of the habitat-forming brown alga Fucus vesiculosus (Phaeophyceae) has similar cross-Atlantic structure that reflects past and present drivers, 2021, Journal of Phycology

Best Publications

  • Global regime shift dynamics of catastrophic sea urchin overgrazing

    S. D. Ling;R. E. Scheibling;A. Rassweiler;C. R. Johnson

  • Overland dispersal of aquatic invasive species: a risk assessment of transient recreational boating.

    Ladd E. Johnson;Anthony Ricciardi;James T. Carlton

  • Post-Establishment Spread in Large-Scale Invasions: Dispersal Mechanisms of the Zebra Mussel Dreissena Polymorpha

    Ladd E. Johnson;James T. Carlton

  • Geographic spread of exotic species: Ecological lessons and opportunities from the invasion of the zebra mussel Dreissena polymorpha

    Ladd E. Johnson;Dianna K. Padilla

  • SURVIVAL OF FUCOID EMBRYOS IN THE INTERTIDAL ZONE DEPENDS UPON DEVELOPMENTAL STAGE AND MICROHABITAT1

    Susan H. Brawley;Ladd E. Johnson

  • Forecasting the expansion of zebra mussels in the United States.

    Jonathan M. Bossenbroek;Ladd E. Johnson;Brett Peters;David M. Lodge

  • Gametogenesis, gametes and zygotes: An ecological perspective on sexual reproduction in the algae

    Susan H. Brawley;Ladd E. Johnson

  • Temporal variation in community interfaces: kelp-bed boundary dynamics adjacent to persistent urchin barrens

    P. Gagnon;J. H. Himmelman;L. E. Johnson

  • Settling barnacle larvae avoid substrata previously occupied by a mobile predator

    Ladd E. Johnson;Richard R. Strathmann

  • Enhanced early detection and enumeration of zebra mussel (Dreissena spp.) veligers using cross-polarized light microscopy

    Ladd E. Johnson

  • Kelp distribution in the northwest Atlantic Ocean under a changing climate

    Anissa Merzouk;Ladd Erik Johnson

  • Historical invasions of the intertidal zone of Atlantic North America associated with distinctive patterns of trade and emigration

    Susan H. Brawley;James A. Coyer;April M. H. Blakeslee;Galice Hoarau

  • Dispersal and recruitment of a canopy-forming intertidal alga: the relative roles of propagule availability and post-settlement processes.

    Ladd E. Johnson;Susan H. Brawley

  • Local enhancement of epibenthic macrofauna by aquaculture activities

    Olivier D’Amours;Philippe Archambault;Christopher W. McKindsey;Ladd E. Johnson

  • Patterns and Pathways in the Post-Establishment Spread of Non-Indigenous Aquatic Species: The Slowing Invasion of North American Inland Lakes by the Zebra Mussel

    Ladd E. Johnson;Jonathan M. Bossenbroek;Clifford E. Kraft

  • Macroalgal canopies: distribution and diversity of associated invertebrates and effects on the recruitment and growth of mussels

    Chantale Bégin;Ladd E. Johnson;John H. Himmelman

  • Distribution and feeding ecology of the seastars Leptasterias polaris and Asterias vulgaris in the northern Gulf of St Lawrence, Canada

    Carlos F. Gaymer;John H. Himmelman;Ladd E. Johnson

  • LANDSCAPE PATTERNS OF AN AQUATIC INVADER: ASSESSING DISPERSAL EXTENT FROM SPATIAL DISTRIBUTIONS

    Clifford E. Kraft;Patrick J. Sullivan;Alexander Y. Karatayev;Lyubov E. Burlakova

  • Gamete Release at Low Tide in Fucoid Algae: Maladaptive or Advantageous?

    Susan H. Brawley;Ladd E. Johnson;Gareth A. Pearson;Vladislav Speransky

  • Algal colonization in urchin barrens: defense by association during recruitment of the brown alga Agarum cribrosum

    Patrick Gagnon;John H. Himmelman;Ladd E. Johnson

Frequent Co-Authors

John H. Himmelman
John H. Himmelman Université Laval
Philippe Archambault
Philippe Archambault Université Laval
Anne K. Salomon
Anne K. Salomon Simon Fraser University
Clifford E. Kraft
Clifford E. Kraft Cornell University
Dianna K. Padilla
Dianna K. Padilla Stony Brook University
Sean D. Connell
Sean D. Connell University of Adelaide
James T. Carlton
James T. Carlton Williams College
Galice Hoarau
Galice Hoarau Nord University
Carlos F. Gaymer
Carlos F. Gaymer Universidad Católica del Norte
Craig R. Johnson
Craig R. Johnson University of Tasmania

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Related Online Degrees & Career Pathways

Exploring a degree in Ecology and Evolution opens doors to a diverse array of career opportunities in research, conservation, education, and industry. If you're considering a broader educational journey or a potential career shift, there are many flexible options available through online learning.

For example, professionals seeking a new direction might find inspiration in stories of career change for teachers higher pay. Many discover that their scientific background translates well into specialized fields such as speech-language pathology, offering both personal fulfillment and increased earning potential.

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With so many pathways open, students and working professionals alike can tailor their educational journey to fit their interests and career aspirations—all from the convenience of online learning.

Best Scientists Citing Ladd E. Johnson

Thomas Wernberg

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Publications: 28

Stephen J. Hawkins

Stephen J. Hawkins

University of Southampton

Publications: 27

Robert Eric Scheibling

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Publications: 24

Lyubov E. Burlakova

Lyubov E. Burlakova

Buffalo State College

Publications: 24

Ester A. Serrão

Ester A. Serrão

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Publications: 23

Alexander Y. Karatayev

Alexander Y. Karatayev

Buffalo State College

Publications: 19

Hugh J. MacIsaac

Hugh J. MacIsaac

University of Windsor

Publications: 19

Gareth A. Pearson

Gareth A. Pearson

University of Algarve

Publications: 18

John H. Himmelman

John H. Himmelman

Université Laval

Publications: 18

Dianna K. Padilla

Dianna K. Padilla

Stony Brook University

Publications: 17

Fabio Bulleri

Fabio Bulleri

University of Pisa

Publications: 17

David M. Lodge

David M. Lodge

Cornell University

Publications: 16

Craig R. Johnson

Craig R. Johnson

University of Tasmania

Publications: 16

Ricardo A. Scrosati

Ricardo A. Scrosati

St. Francis Xavier University

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Philippe Archambault

Philippe Archambault

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Publications: 16

Richard C. Thompson

Richard C. Thompson

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