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D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Environmental Sciences 38 8702 8348 3110 2890 113 4896

Richard E. Connon publications per year

The chart shows the history of publications by Richard E. Connon between 2000 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Richard E. Connon published across 26 years, from 2000 to 2025, averaging 4.8 papers a year. Output peaked at 12 publications in 2021. 15 of the 125 publications appeared in the last two years.

No. of publications
5 10
Bar chart. Horizontal axis: year, 2000 to 2025. Vertical axis: number of publications, 0 to 12. Peak 12 publications in 2021. 2000: 1 publication 2001: 0 publications 2002: 0 publications 2003: 4 publications 2004: 0 publications 2005: 1 publication 2006: 2 publications 2007: 2 publications 2008: 3 publications 2009: 1 publication 2010: 1 publication 2011: 3 publications 2012: 4 publications 2013: 4 publications 2014: 4 publications 2015: 9 publications 2016: 11 publications 2017: 9 publications 2018: 6 publications 2019: 10 publications 2020: 6 publications 2021: 12 publications 2022: 11 publications 2023: 6 publications 2024: 7 publications 2025: 8 publications
2000 2025

125 publications in total across all disciplines

View publications per year as a table
Richard E. Connon: publications per year, 2000 to 2025
Year Publications
2000 1
2001 0
2002 0
2003 4
2004 0
2005 1
2006 2
2007 2
2008 3
2009 1
2010 1
2011 3
2012 4
2013 4
2014 4
2015 9
2016 11
2017 9
2018 6
2019 10
2020 6
2021 12
2022 11
2023 6
2024 7
2025 8
Total 125
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Richard E. Connon 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 Richard E. Connon sits on this spectrum.

No. of scientists
200 400 600
Bar chart with 66 bars. Horizontal axis: publications, 41–50 to 690+. Vertical axis: number of scientists, 0 to 617. Most scientists, 617, have 121–130 publications. The last bar groups every scientist with 690 publications or more. The highlighted bar, 111–120 publications, is where this scientist sits. 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: 282 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: 26 scientists 501–510 publications: 17 scientists 511–520 publications: 19 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 681–689 publications: 4 scientists 690+ publications: 100 scientists
41–50 publications 690+

This scientist: 113 publications — 20th percentile

20% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 690 publications or more.

View publications distribution as a table
Number of Environmental Sciences scientists by publication count, Research.com 2026 ranking edition. Based on 9,676 ranked scientists.
Publications Scientists This scientist
41–50 21
51–60 62
61–70 133
71–80 257
81–90 361
91–100 440
101–110 492
111–120 541 113
121–130 617
131–140 544
141–150 541
151–160 539
161–170 444
171–180 444
181–190 400
191–200 377
201–210 318
211–220 282
221–230 263
231–240 220
241–250 217
251–260 180
261–270 181
271–280 155
281–290 130
291–300 127
301–310 130
311–320 85
321–330 106
331–340 80
341–350 83
351–360 75
361–370 69
371–380 52
381–390 54
391–400 56
401–410 44
411–420 40
421–430 36
431–440 25
441–450 25
451–460 32
461–470 29
471–480 21
481–490 26
491–500 26
501–510 17
511–520 19
521–530 15
531–540 22
541–550 12
551–560 15
561–570 11
571–580 19
581–590 9
591–600 9
601–610 7
611–620 11
621–630 5
631–640 5
641–650 6
651–660 3
661–670 3
671–680 4
681–689 4
690+ 100
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Richard E. Connon 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 Richard E. Connon sits on this spectrum.

No. of scientists
100 200 300
Bar chart with 97 bars. Horizontal axis: D-Index, 30 to 126+. Vertical axis: number of scientists, 0 to 348. Most scientists, 348, have 45 D-Index. The last bar groups every scientist with 126 D-Index or more. The highlighted bar, 38 D-Index, is where this scientist sits. 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: 198 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: 20 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: 9 scientists 126+ D-Index: 92 scientists
30 D-Index 126+

This scientist: 38 D-Index — 12th percentile

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

The last bar groups every scientist with 126 D-Index or more.

View D-Index distribution as a table
Number of Environmental Sciences scientists by D-index, Research.com 2026 ranking edition. Based on 9,676 ranked scientists.
D-Index Scientists This scientist
30 12
31 26
32 51
33 88
34 123
35 163
36 206
37 267
38 265 38
39 275
40 321
41 343
42 305
43 336
44 330
45 348
46 291
47 275
48 272
49 273
50 263
51 232
52 266
53 217
54 198
55 177
56 202
57 204
58 166
59 177
60 166
61 152
62 143
63 150
64 124
65 119
66 120
67 118
68 82
69 98
70 94
71 105
72 74
73 84
74 70
75 67
76 78
77 60
78 59
79 52
80 47
81 38
82 48
83 42
84 42
85 43
86 29
87 37
88 29
89 30
90 34
91 20
92 22
93 17
94 19
95 24
96 21
97 20
98 24
99 17
100 17
101 21
102 25
103 18
104 26
105 20
106 15
107 10
108 13
109 15
110 12
111 8
112 7
113 9
114 6
115 12
116 7
117 8
118 3
119 5
120 7
121 2
122 4
123 8
124 7
125 9
126+ 92
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Overview

Richard E. Connon is affiliated with the University of California, Davis in the United States. Their research primarily focuses on environmental science, with a total of 88 publications in this field.

Their subfields of study encompass ecology, health, toxicology and mutagenesis, nature and landscape conservation, pollution, and molecular biology. Key topics investigated in their work include environmental toxicology and ecotoxicology, fish ecology and management studies, pesticide and herbicide environmental studies, physiological and biochemical adaptations, environmental DNA in biodiversity studies, reproductive biology and impacts on aquatic species, and identification and quantification in food.

Their frequent publication venues include Environmental Pollution with eight papers, Conservation Physiology with seven, Environmental Science & Technology and The Science of The Total Environment each with three, and San Francisco Estuary and Watershed Science also with three.

Frequent coauthors of Richard E. Connon are:

  • Nann A. Fangue (16 coauthored papers)
  • Amélie Segarra (13 coauthored papers)
  • Michael J. Lydy (12 coauthored papers)
  • Susanne M. Brander (11 coauthored papers)
  • Tien-Chieh Hung (11 coauthored papers)

Some recent papers by Richard E. Connon include:

  • Environmental DNA Methods for Ecological Monitoring and Biodiversity Assessment in Estuaries, 2022, published in Estuaries and Coasts
  • Multigenerational and Transgenerational Effects of Environmentally Relevant Concentrations of Endocrine Disruptors in an Estuarine Fish Model, 2020, published in Environmental Science & Technology
  • Early Life Exposure to Environmentally Relevant Levels of Endocrine Disruptors Drive Multigenerational and Transgenerational Epigenetic Changes in a Fish Model, 2020, published in Frontiers in Marine Science
  • Bifenthrin exposure causes hyperactivity in early larval stages of an endangered fish species at concentrations that occur during their hatching season, 2020, published in Aquatic Toxicology
  • Transcriptional flexibility during thermal challenge corresponds with expanded thermal tolerance in an invasive compared to native fish, 2020, published in Evolutionary Applications

Best Publications

  • Effect-Based Tools for Monitoring and Predicting the Ecotoxicological Effects of Chemicals in the Aquatic Environment

    Richard E. Connon;Juergen Geist;Inge Werner

  • Pyrethroid Pesticides as Endocrine Disruptors: Molecular Mechanisms in Vertebrates with a Focus on Fishes.

    Susanne M. Brander;Molly K. Gabler;Nicholas L. Fowler;Richard E. Connon

  • Chronic toxicity of ibuprofen to Daphnia magna: Effects on life history traits and population dynamics

    Lars Henrik Heckmann;Amanda Callaghan;Helen L. Hooper;Richard E Connon

  • Systems biology meets stress ecology: linking molecular and organismal stress responses in Daphnia magna.

    Lars Henrik Heckmann;Lars Henrik Heckmann;Richard M. Sibly;Richard E Connon;Richard E Connon;Helen L. Hooper

  • Sublethal toxicity of commercial insecticide formulations and their active ingredients to larval fathead minnow (Pimephales promelas)

    Sebastian Beggel;Inge Werner;Richard E. Connon;Juergen P. Geist

  • Expression of target and reference genes in Daphnia magna exposed to ibuprofen

    Lars Henrik Heckmann;Richard E Connon;Thomas H. Hutchinson;Steve J. Maund

  • Linking Molecular and Population Stress Responses in Daphnia magna exposed to cadmium

    Richard E Connon;Helen L. Hooper;Richard M. Sibly;Fei Ling Lim

  • Effects of high temperatures on threatened estuarine fishes during periods of extreme drought

    Ken M. Jeffries;Richard E. Connon;Brittany E. Davis;Lisa M. Komoroske

  • Ontogeny influences sensitivity to climate change stressors in an endangered fish

    L. M. Komoroske;Richard E Connon;J. Lindberg;B. S. Cheng

  • The utility of transcriptomics in fish conservation.

    Richard E. Connon;Ken M. Jeffries;Lisa M. Komoroske;Lisa M. Komoroske;Anne E. Todgham

  • Linking mechanistic and behavioral responses to sublethal esfenvalerate exposure in the endangered delta smelt; Hypomesus transpacificus (Fam. Osmeridae)

    Richard E Connon;Juergen Geist;Juergen Geist;Janice Pfeiff;Alexander V Loguinov

  • Transcriptomic changes underlie altered egg protein production and reduced fecundity in an estuarine model fish exposed to bifenthrin.

    Susanne M. Brander;Ken M. Jeffries;Bryan J. Cole;Bethany M. DeCourten

  • Impacts of the phenylpyrazole insecticide fipronil on larval fish: Time-series gene transcription responses in fathead minnow (Pimephales promelas) following short-term exposure

    Sebastian Beggel;Inge Werner;Richard E. Connon;Juergen P. Geist

  • THE ECOLOGICAL NICHE OF DAPHNIA MAGNA CHARACTERIZED USING POPULATION GROWTH RATE

    Helen L. Hooper;Richard E Connon;Amanda Callaghan;Geoffrey Fryer

  • Turbidity and Salinity Affect Feeding Performance and Physiological Stress in the Endangered Delta Smelt

    Matthias Hasenbein;Lisa M. Komoroske;Richard E. Connon;Juergen Geist

  • Changes in gene transcription and whole organism responses in larval fathead minnow (Pimephales promelas) following short-term exposure to the synthetic pyrethroid bifenthrin

    Sebastian Beggel;Richard E Connon;Inge Werner;Juergen Geist

  • Is Extinction Inevitable for Delta Smelt and Longfin Smelt? An Opinion and Recommendations for Recovery

    James A. Hobbs;Peter B. Moyle;Nann Fangue;Richard E. Connon

  • Linking transcriptional responses to organismal tolerance reveals mechanisms of thermal sensitivity in a mesothermal endangered fish.

    Lisa M. Komoroske;Lisa M. Komoroske;Richard E. Connon;Ken M. Jeffries;Nann A. Fangue

  • Coupled Downscaled Climate Models and Ecophysiological Metrics Forecast Habitat Compression for an Endangered Estuarine Fish

    Larry R. Brown;Lisa M. Komoroske;Lisa M. Komoroske;R. Wayne Wagner;Tara Morgan-King

  • Environmentally relevant concentrations of herbicides impact non-target species at multiple sublethal endpoints

    Simone Hasenbein;Jade Peralta;Sharon P. Lawler;Richard E. Connon

  • Sublethal salinity stress contributes to habitat limitation in an endangered estuarine fish.

    Lisa M. Komoroske;Lisa M. Komoroske;Ken M. Jeffries;Richard E. Connon;Jason Dexter

  • Chronic exposures to low and high concentrations of ibuprofen elicit different gene response patterns in a euryhaline fish

    Ken M. Jeffries;Susanne M. Brander;Monica T. Britton;Nann A. Fangue

  • Developmental exposure to environmentally relevant concentrations of bifenthrin alters transcription of mTOR and ryanodine receptor-dependent signaling molecules and impairs predator avoidance behavior across early life stages in inland silversides (Menidia beryllina).

    Daniel F. Frank;Susanne M. Brander;Simone Hasenbein;Simone Hasenbein;Danielle J. Harvey

Frequent Co-Authors

Nann A. Fangue
Nann A. Fangue University of California, Davis
Juergen Geist
Juergen Geist Technical University of Munich
Amanda Callaghan
Amanda Callaghan University of Reading
Sharon P. Lawler
Sharon P. Lawler University of California, Davis
Michael J. Lydy
Michael J. Lydy Southern Illinois University Carbondale
Richard M. Sibly
Richard M. Sibly University of Reading
Donald P. Weston
Donald P. Weston University of California, Berkeley
Gary N. Cherr
Gary N. Cherr University of California, Davis
Mark Crane
Mark Crane Royal Holloway University of London
Pamela J. Lein
Pamela J. Lein University of California, Davis

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