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D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Earth Science 63 1601 1432 71 62 365 13770

Fred J. Longstaffe publications per year

The chart shows the history of publications by Fred J. Longstaffe between 1974 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Fred J. Longstaffe published across 52 years, from 1974 to 2025, averaging 8.3 papers a year. Output peaked at 24 publications in 2016. 22 of the 433 publications appeared in the last two years.

No. of publications
5 10 15 20
Bar chart. Horizontal axis: year, 1974 to 2025. Vertical axis: number of publications, 0 to 24. Peak 24 publications in 2016. 1974: 1 publication 1975: 0 publications 1976: 0 publications 1977: 2 publications 1978: 1 publication 1979: 1 publication 1980: 4 publications 1981: 2 publications 1982: 5 publications 1983: 6 publications 1984: 2 publications 1985: 2 publications 1986: 4 publications 1987: 6 publications 1988: 3 publications 1989: 6 publications 1990: 8 publications 1991: 5 publications 1992: 5 publications 1993: 5 publications 1994: 10 publications 1995: 8 publications 1996: 14 publications 1997: 12 publications 1998: 11 publications 1999: 6 publications 2000: 12 publications 2001: 4 publications 2002: 6 publications 2003: 8 publications 2004: 12 publications 2005: 5 publications 2006: 7 publications 2007: 9 publications 2008: 8 publications 2009: 7 publications 2010: 9 publications 2011: 12 publications 2012: 16 publications 2013: 14 publications 2014: 15 publications 2015: 12 publications 2016: 24 publications 2017: 14 publications 2018: 12 publications 2019: 14 publications 2020: 17 publications 2021: 16 publications 2022: 17 publications 2023: 12 publications 2024: 12 publications 2025: 10 publications
1974 2025

433 publications in total across all disciplines

View publications per year as a table
Fred J. Longstaffe: publications per year, 1974 to 2025
Year Publications
1974 1
1975 0
1976 0
1977 2
1978 1
1979 1
1980 4
1981 2
1982 5
1983 6
1984 2
1985 2
1986 4
1987 6
1988 3
1989 6
1990 8
1991 5
1992 5
1993 5
1994 10
1995 8
1996 14
1997 12
1998 11
1999 6
2000 12
2001 4
2002 6
2003 8
2004 12
2005 5
2006 7
2007 9
2008 8
2009 7
2010 9
2011 12
2012 16
2013 14
2014 15
2015 12
2016 24
2017 14
2018 12
2019 14
2020 17
2021 16
2022 17
2023 12
2024 12
2025 10
Total 433
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Fred J. Longstaffe publication distribution in Earth Science in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Earth Science in 2026. The highlighted bar marks where Fred J. Longstaffe sits on this spectrum.

No. of scientists
100 200 300 400 500
Bar chart with 58 bars. Horizontal axis: publications, 38–47 to 603+. Vertical axis: number of scientists, 0 to 557. Most scientists, 557, have 128–137 publications. The last bar groups every scientist with 603 publications or more. The highlighted bar, 358–367 publications, is where this scientist sits. 38–47 publications: 5 scientists 48–57 publications: 33 scientists 58–67 publications: 94 scientists 68–77 publications: 161 scientists 78–87 publications: 278 scientists 88–97 publications: 376 scientists 98–107 publications: 404 scientists 108–117 publications: 484 scientists 118–127 publications: 540 scientists 128–137 publications: 557 scientists 138–147 publications: 491 scientists 148–157 publications: 495 scientists 158–167 publications: 458 scientists 168–177 publications: 490 scientists 178–187 publications: 414 scientists 188–197 publications: 401 scientists 198–207 publications: 333 scientists 208–217 publications: 292 scientists 218–227 publications: 290 scientists 228–237 publications: 262 scientists 238–247 publications: 243 scientists 248–257 publications: 208 scientists 258–267 publications: 185 scientists 268–277 publications: 147 scientists 278–287 publications: 128 scientists 288–297 publications: 119 scientists 298–307 publications: 120 scientists 308–317 publications: 107 scientists 318–327 publications: 93 scientists 328–337 publications: 87 scientists 338–347 publications: 64 scientists 348–357 publications: 87 scientists 358–367 publications: 60 scientists 368–377 publications: 60 scientists 378–387 publications: 34 scientists 388–397 publications: 50 scientists 398–407 publications: 44 scientists 408–417 publications: 31 scientists 418–427 publications: 39 scientists 428–437 publications: 27 scientists 438–447 publications: 36 scientists 448–457 publications: 27 scientists 458–467 publications: 29 scientists 468–477 publications: 30 scientists 478–487 publications: 19 scientists 488–497 publications: 15 scientists 498–507 publications: 18 scientists 508–517 publications: 19 scientists 518–527 publications: 16 scientists 528–537 publications: 10 scientists 538–547 publications: 11 scientists 548–557 publications: 14 scientists 558–567 publications: 11 scientists 568–577 publications: 7 scientists 578–587 publications: 14 scientists 588–597 publications: 5 scientists 598–602 publications: 4 scientists 603+ publications: 100 scientists
38–47 publications 603+

This scientist: 365 publications — 93rd percentile

93% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 603 publications or more.

View publications distribution as a table
Number of Earth Science scientists by publication count, Research.com 2026 ranking edition. Based on 9,176 ranked scientists.
Publications Scientists This scientist
38–47 5
48–57 33
58–67 94
68–77 161
78–87 278
88–97 376
98–107 404
108–117 484
118–127 540
128–137 557
138–147 491
148–157 495
158–167 458
168–177 490
178–187 414
188–197 401
198–207 333
208–217 292
218–227 290
228–237 262
238–247 243
248–257 208
258–267 185
268–277 147
278–287 128
288–297 119
298–307 120
308–317 107
318–327 93
328–337 87
338–347 64
348–357 87
358–367 60 365
368–377 60
378–387 34
388–397 50
398–407 44
408–417 31
418–427 39
428–437 27
438–447 36
448–457 27
458–467 29
468–477 30
478–487 19
488–497 15
498–507 18
508–517 19
518–527 16
528–537 10
538–547 11
548–557 14
558–567 11
568–577 7
578–587 14
588–597 5
598–602 4
603+ 100
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Fred J. Longstaffe D-index placement in Earth Science in 2026

The chart shows the D-index (discipline H-index) distribution of Earth Science scientists ranked by Research.com in 2026. The highlighted bar marks where Fred J. Longstaffe sits on this spectrum.

No. of scientists
100 200 300
Bar chart with 77 bars. Horizontal axis: D-Index, 30 to 106+. Vertical axis: number of scientists, 0 to 389. Most scientists, 389, have 36 D-Index. The last bar groups every scientist with 106 D-Index or more. The highlighted bar, 63 D-Index, is where this scientist sits. 30 D-Index: 144 scientists 31 D-Index: 215 scientists 32 D-Index: 278 scientists 33 D-Index: 379 scientists 34 D-Index: 366 scientists 35 D-Index: 372 scientists 36 D-Index: 389 scientists 37 D-Index: 366 scientists 38 D-Index: 344 scientists 39 D-Index: 349 scientists 40 D-Index: 296 scientists 41 D-Index: 289 scientists 42 D-Index: 277 scientists 43 D-Index: 279 scientists 44 D-Index: 248 scientists 45 D-Index: 257 scientists 46 D-Index: 212 scientists 47 D-Index: 202 scientists 48 D-Index: 207 scientists 49 D-Index: 204 scientists 50 D-Index: 183 scientists 51 D-Index: 178 scientists 52 D-Index: 182 scientists 53 D-Index: 178 scientists 54 D-Index: 163 scientists 55 D-Index: 117 scientists 56 D-Index: 163 scientists 57 D-Index: 120 scientists 58 D-Index: 113 scientists 59 D-Index: 136 scientists 60 D-Index: 135 scientists 61 D-Index: 96 scientists 62 D-Index: 103 scientists 63 D-Index: 83 scientists 64 D-Index: 103 scientists 65 D-Index: 83 scientists 66 D-Index: 89 scientists 67 D-Index: 92 scientists 68 D-Index: 89 scientists 69 D-Index: 78 scientists 70 D-Index: 75 scientists 71 D-Index: 53 scientists 72 D-Index: 62 scientists 73 D-Index: 54 scientists 74 D-Index: 35 scientists 75 D-Index: 52 scientists 76 D-Index: 50 scientists 77 D-Index: 32 scientists 78 D-Index: 37 scientists 79 D-Index: 20 scientists 80 D-Index: 33 scientists 81 D-Index: 36 scientists 82 D-Index: 34 scientists 83 D-Index: 34 scientists 84 D-Index: 24 scientists 85 D-Index: 19 scientists 86 D-Index: 18 scientists 87 D-Index: 26 scientists 88 D-Index: 30 scientists 89 D-Index: 17 scientists 90 D-Index: 21 scientists 91 D-Index: 19 scientists 92 D-Index: 15 scientists 93 D-Index: 14 scientists 94 D-Index: 20 scientists 95 D-Index: 9 scientists 96 D-Index: 10 scientists 97 D-Index: 15 scientists 98 D-Index: 13 scientists 99 D-Index: 3 scientists 100 D-Index: 13 scientists 101 D-Index: 3 scientists 102 D-Index: 9 scientists 103 D-Index: 4 scientists 104 D-Index: 6 scientists 105 D-Index: 6 scientists 106+ D-Index: 98 scientists
30 D-Index 106+

This scientist: 63 D-Index — 83rd percentile

83% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 106 D-Index or more.

View D-Index distribution as a table
Number of Earth Science scientists by D-index, Research.com 2026 ranking edition. Based on 9,176 ranked scientists.
D-Index Scientists This scientist
30 144
31 215
32 278
33 379
34 366
35 372
36 389
37 366
38 344
39 349
40 296
41 289
42 277
43 279
44 248
45 257
46 212
47 202
48 207
49 204
50 183
51 178
52 182
53 178
54 163
55 117
56 163
57 120
58 113
59 136
60 135
61 96
62 103
63 83 63
64 103
65 83
66 89
67 92
68 89
69 78
70 75
71 53
72 62
73 54
74 35
75 52
76 50
77 32
78 37
79 20
80 33
81 36
82 34
83 34
84 24
85 19
86 18
87 26
88 30
89 17
90 21
91 19
92 15
93 14
94 20
95 9
96 10
97 15
98 13
99 3
100 13
101 3
102 9
103 4
104 6
105 6
106+ 98
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Overview

Fred J. Longstaffe is affiliated with the University of Western Ontario in Canada. Their research primarily spans the fields of Earth and Planetary Sciences and Environmental Science, with extensive work in several interconnected subfields including Ecology, Atmospheric Science, Paleontology, Astronomy and Astrophysics, and Geophysics.

The scientist's work focuses on a range of topics related to geological and paleoenvironmental studies. Key thematic areas include:

  • Geology and Paleoclimatology Research
  • Isotope Analysis in Ecology
  • Archaeology and Ancient Environmental Studies
  • Groundwater and Isotope Geochemistry
  • Paleontology and Stratigraphy of Fossils
  • Marine Animal Studies Overview
  • Planetary Science and Exploration

Among notable recent papers, the following are representative of their research contributions:

  • Probing the hydrothermal system of the Chicxulub impact crater, 2020, published in Science Advances
  • Hydrothermal alteration associated with the Chicxulub impact crater upper peak-ring breccias, 2020, published in Earth and Planetary Science Letters
  • Large-scale stable isotope characterization of a Late Cretaceous dinosaur-dominated ecosystem, 2020, published in Geology
  • Relating wing morphology and immune function to patterns of partial and differential bat migration using stable isotopes, 2022, published in Journal of Animal Ecology
  • Systematics of smectite hydrogen-isotope composition: Structural hydrogen versus adsorbed water, 2021, published in Applied Clay Science

Fred J. Longstaffe has frequently collaborated with other researchers. Prominent co-authors include Rebecca M. Doyle, G. R. Osinski, Tessa Plint, Diana K. Moreiras Reynaga, and Jean-François Millaire.

Their publications often appear in recurring venues that reflect their specialized research focus. These include:

  • Chemical Geology
  • Data in Brief
  • Zenodo (CERN European Organization for Nuclear Research)
  • Applied Clay Science
  • Scientific Reports

This profile presents a snapshot of Fred J. Longstaffe's scientific work as an active contributor to earth and planetary sciences and related disciplines, illustrating interdisciplinary research through isotope geochemistry, paleoecology, and impact crater studies.

Best Publications

  • Sources and sinks of microplastics in Canadian Lake Ontario nearshore, tributary and beach sediments

    Anika Ballent;Patricia L. Corcoran;Odile Madden;Paul A. Helm

  • Geochemical and Isotopic (O, Nd, Pb and Sr) Constraints on A-type Granite Petrogenesis Based on the Topsails Igneous Suite, Newfoundland Appalachians

    Joseph. B. Whalen;George A. Jenner;Frederick J. Longstaffe;Francine Robert

  • Proportions of convective and stratiform precipitation revealed in water isotope ratios

    Pradeep K. Aggarwal;Ulrike Romatschke;Luis Araguas-Araguas;Dagnachew Belachew

  • Origin and evolution of formation waters, Alberta Basin, Western Canada sedimentary Basin. I. Chemistry

    Cathy A. Connolly;Lynn M. Walter;H. Baadsgaard;Fred J. Longstaffe

  • Spatial, temporal and geochemical characteristics of Silurian collision-zone magmatism, Newfoundland Appalachians: An example of a rapidly evolving magmatic system related to slab break-off

    Joseph B. Whalen;Vicki J. McNicoll;Cees R. van Staal;C. Johan Lissenberg

  • Spatial distribution of microbial methane production pathways in temperate zone wetland soils: Stable carbon and hydrogen isotope evidence

    Edward R.C. Hornibrook;Frederick J. Longstaffe;William S. Fyfe

  • Exploring the effects of environment, physiology and diet on oxygen isotope ratios in ancient Nubian bones and teeth

    Christine White;Fred J. Longstaffe;Kimberley R. Law

  • Burning and boiling of modern deer bone: Effects on crystallinity and oxygen isotope composition of bioapatite phosphate

    L.E. Munro;F.J. Longstaffe;C.D. White

  • Influence of seabird guano and camelid dung fertilization on the nitrogen isotopic composition of field-grown maize (Zea mays)

    Paul Szpak;Jean-François Millaire;Christine D. White;Fred J. Longstaffe

  • Origin and evolution of formation waters, Alberta Basin, Western Canada Sedimentary Basin. II. Isotope systematics and water mixing

    Cathy A. Connolly;Lynn M. Walter;H. Baadsgaard;Fred J. Longstaffe

  • Carbon and Nitrogen Isotopic Survey of Northern Peruvian Plants: Baselines for Paleodietary and Paleoecological Studies

    Paul Szpak;Christine D. White;Fred J. Longstaffe;Jean-François Millaire

  • Isotopic evidence for Maya patterns of deer and dog use at Preclassic Colha

    Christine D. White;Mary E.D. Pohl;Henry P. Schwarcz;Fred J. Longstaffe

  • Geographic Identities of the Sacrificial Victims from the Feathered Serpent Pyramid, Teotihuacan: Implications for the Nature of State Power

    Christine D. White;Michael W. Spence;Fred J. Longstaffe;Hilary Stuart-Williams

  • Evolution of stable carbon isotope compositions for methane and carbon dioxide in freshwater wetlands and other anaerobic environments

    Edward R.C. Hornibrook;Frederick J. Longstaffe;William S. Fyfe

  • A Mainly Crustal Origin for Tonalitic Granitoid Rocks, Superior Province, Canada: Implications for Late Archean Tectonomagmatic Processes

    Joseph B. Whalen;John A. Percival;Vicki J. McNICOLL;Frederick J. Longstaffe

  • Testing the Nature of Teotihuacán Imperialism at Kaminaljuyú Using Phosphate Oxygen-Isotope Ratios

    Christine D. White;Michael W. Spence;Fred J. Longstaffe;Kimberley R. Law

  • Demography and ethnic continuity in the Tlailotlacan enclave of Teotihuacan: the evidence from stable oxygen isotopes

    Christine D. White;Michael W. Spence;Fred J. Longstaffe;Kimberley R. Law

  • Mineral precipitation by epilithic biofilms in the speed river, ontario, Canada.

    K. O. Konhauser;S. Schultze-Lam;F. G. Ferris;W. S. Fyfe

  • Geochemical and isotopic (Nd-O) evidence bearing on the origin of late- to post-orogenic high-K granitoid rocks in the Western Superior Province: implications for late Archean tectonomagmatic processes

    Joseph.B. Whalen;John A. Percival;Vicki J. McNicoll;Frederick J. Longstaffe

  • RESIDENTIAL HISTORIES OF THE HUMAN SACRIFICES AT THE MOON PYRAMID, TEOTIHUACAN: Evidence from oxygen and strontium isotopes

    Christine D. White;T. Douglas Price;Fred J. Longstaffe

  • Reply to comment by S. Waldron, A. Fallick, and A. Hall on "Spatial distribution of microbial methane production pathways in temperate zone wetland soils: Stable carbon and hydrogen isotope evidence"

    Erc Hornibrook;FJ Longstaffe;WS Fyfe

Frequent Co-Authors

Joseph B. Whalen
Joseph B. Whalen Geological Survey of Canada
William S. Fyfe
William S. Fyfe University of Western Ontario
Grant D. Zazula
Grant D. Zazula Simon Fraser University
George A. Jenner
George A. Jenner Memorial University of Newfoundland
Avner Ayalon
Avner Ayalon Hebrew University of Jerusalem
Sandra M. Barr
Sandra M. Barr Acadia University
Michael I. Bird
Michael I. Bird James Cook University
Ali Polat
Ali Polat University of Windsor
Aldo Shemesh
Aldo Shemesh Weizmann Institute of Science
Brian J. Fryer
Brian J. Fryer University of Windsor

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Related Online Degrees & Career Pathways

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Considering the value of library and information science, investigating is a library science degree worth it highlights the benefits of combining scientific inquiry with information organization, aiding accessibility to critical data for environmental studies and policy development.

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