World's Best Scientists 2026 revealed!

D-Index & Metrics

Environmental Sciences

D-Index
42
Citations
8606
World Ranking
7311
National Ranking
2606

Gerald R. Smith 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 Gerald R. Smith 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: 87 publications — 7th percentile

7% of scientists in this discipline score the same or lower.

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

Gerald R. Smith 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 Gerald R. Smith 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: 42 D-Index — 25th percentile

25% of scientists in this discipline score the same or lower.

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

Overview

Gerald R. Smith is affiliated with the University of Michigan-Ann Arbor in the United States. Their research primarily focuses on the Agricultural and Biological Sciences, with 49 publications in this field. Within this broad domain, their work spans several subfields, including Plant Science, Agronomy and Crop Science, Ecology, Evolution, Behavior and Systematics, Soil Science, and Global and Planetary Change.

The scientist's recent papers emphasize topics such as climate change impacts on agriculture, agronomic practices and intercropping systems, agricultural pest management studies, legume nitrogen-fixing symbiosis, soil carbon and nitrogen dynamics, crop yield and soil fertility, and bioenergy crop production and management.

  • Species identification and morphological trait diversity assessment in ryegrass (Lolium spp.) populations from the Texas Blackland Prairies (2021, Weed Science)
  • Assessing Cowpea-Wheat Double Cropping Strategies in the Southern United States Using the DSSAT Crop Model (2022, Agricultural Sciences)
  • Exploring the Potential of Cowpea-Wheat Double Cropping in the Semi-Arid Region of the Southern United States Using the DSSAT Crop Model (2023, Agricultural Sciences)
  • Cowpeas as a summer cover crop for forage rye (2020, Agrosystems Geosciences & Environment)
  • Impact on Soil Organic C and Total Soil N from Cool- and Warm-Season Legumes Used in a Green Manure-Forage Cropping System (2024, Agricultural Sciences)

Gerald R. Smith has collaborated frequently with several co-authors over multiple publications. These include F. M. Rouquette (19 collaborations), Prem Woli (9 collaborations), Charles R. Long (9 collaborations), Clark Neely (4 collaborations), and Cristine L.S. Morgan (3 collaborations).

The scientist has published in a range of venues, most commonly in Agricultural Sciences (9 publications), followed by the Journal of Plant Registrations (3 publications), Journal of Animal Science (2 publications), Weed Science, and Agrosystems Geosciences & Environment.

In addition to journal articles, Smith has contributed to book publications, with a notable title published by the University of Michigan-Ann Arbor: LATE MIOCENE FISHES OF THE CACHE VALLEY MEMBER, SALT LAKE FORMATION, UTAH AND IDAHO (2020).

Best Publications

  • Morphometrics in Evolutionary Biology.

    R. A. Reyment;F. L. Bookstein;B. Chernoff;R. L. Elder

  • MULTIVARIATE DISCRIMINATION BY SHAPE IN RELATION TO SIZE

    J. M. Humphries;F. L. Bookstein;B. Chernoff;G. R. Smith

  • Establishment of gobiidae in the great lakes basin

    David J. Jude;Robert H. Reider;Gerald R. Smith

  • So Many Fishes, So Little Time: An Overview of Recent Ichthyological Discovery in Continental Waters

    John G. Lundberg;Maurice Kottelat;Gerald R. Smith;Melanie L. J. Stiassny

  • Introgression in fishes : significance for paleontology, cladistics, and evolutionary rates

    Gerald R. Smith

  • Continental Paleothermometry and Seasonality Using the Isotopic Composition of Aragonitic Otoliths of Freshwater Fishes

    William P. Patterson;Gerald R. Smith;Kyger C. Lohmann

  • Origin and Geography of the Fish Fauna of the Laurentian Great Lakes Basin

    Reeve M. Bailey;Gerald R. Smith

  • Fishes of the Great Lakes Region, Revised Edition

    Carl Hubbs;Karl Lagler;Gerald Smith

  • Tetraploid Origin of the Karyotype of Catostomid Fishes

    Teruya Uyeno;G. R. Smith

  • Late Cenozoic Freshwater Fishes of North America

    Gerald R. Smith

  • Phylogeny of the Pacific Trouts and Salmons (Oncorhynchus) and Genera of the Family Salmonidae

    R. F. Stearley;G. R. Smith

  • MULTIVARIATE ANALYSIS OF HYBRID FISHES

    Nancy A. Neff;Gerald R. Smith

  • Distribution and evolution of the North American catostomid fishes of the subgenus Pantosteus, genus Catostomus.

    G. R. Smith

  • The Classification and Scientific Names of Rainbow and Cutthroat Trouts

    Gerald R. Smith;Ralph F. Stearley

  • Freshwater Fishes of Northwestern Canada and Alaska. Bulletin 173. Fisheries Research Board of Canada.J. D. McPhail , C. C. Lindsey

    Unknown

  • REPRODUCTIVE ISOLATION AND INTROGRESSION BETWEEN NOTROPIS CORNUTUS AND NOTROPIS CHRYSOCEPHALUS (FAMILY CYPRINIDAE): COMPARISON OF MORPHOLOGY, ALLOZYMES, AND MITOCHONDRIAL DNA

    Thomas E. Dowling;Gerald R. Smith;Wesley M. Brown

  • FISH TAPHONOMY AND ENVIRONMENTAL INFERENCE IN PALEOLIMNOLOGY

    R. L. Elder;R. L. Elder;Gerald R. Smith;Gerald R. Smith

  • Evolutionary Relationships of the Plagopterins (Teleostei: Cyprinidae) from Cytochrome b Sequences

    Thomas E. Dowling;C. Alana Tibbets;W. L. Minckley;Gerald R. Smith

  • Zebra Mussel Predation by Round Gobies in the Laboratory

    Michael J. Ghedotti;Joseph C. Smihula;Gerald R. Smith

  • Sr isotopic composition of hydroxyapatite from recent and fossil salmon : the record of lifetime migration and diagenesis

    Paul L. Koch;Alex N. Halliday;Lynn M. Walter;Ralph F. Stearley

  • Evolution of species flocks of fishes in north temperate lakes

    G.R. Smith;Thomas N. Todd

  • Early Pleistocene pre-glacial and glacial rocks and faunas of north-central Nebraska. Bulletin of the AMNH ; v. 148, article 1

    Morris F. Skinner;Hibbard, Claude William, .;Edwin D. Gutentag;G. R. Smith

  • Morphometrics in Evolutionary Biology

    James D. Felley;F. L. Bookstein;B. Chernoff;R. L. Elder

Frequent Co-Authors

Thomas E. Dowling
Thomas E. Dowling Wayne State University
Bruce H. Wilkinson
Bruce H. Wilkinson University of Michigan–Ann Arbor
Kyger C. Lohmann
Kyger C. Lohmann University of Michigan–Ann Arbor
William P. Patterson
William P. Patterson University of Saskatchewan
Wesley M. Brown
Wesley M. Brown University of Michigan–Ann Arbor
Richard K. Koehn
Richard K. Koehn University of Utah
James P. Hurley
James P. Hurley University of Wisconsin–Madison
Peter J. Unmack
Peter J. Unmack University of Canberra
Derek C. G. Muir
Derek C. G. Muir Environment and Climate Change Canada
Maurice Kottelat
Maurice Kottelat National University of Singapore

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