World's Best Scientists 2026 revealed!
Stephen J. Giovannoni

Stephen J. Giovannoni

D-Index & Metrics

Microbiology

D-Index
98
Citations
43533
World Ranking
449
National Ranking
208

Stephen J. Giovannoni publication distribution in Microbiology in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Microbiology in 2026. The highlighted bar marks where Stephen J. Giovannoni sits on this spectrum.

55–64 publications: 8 scientists 65–74 publications: 29 scientists 75–84 publications: 55 scientists 85–94 publications: 112 scientists 95–104 publications: 137 scientists 105–114 publications: 190 scientists 115–124 publications: 235 scientists 125–134 publications: 234 scientists 135–144 publications: 288 scientists 145–154 publications: 264 scientists 155–164 publications: 264 scientists 165–174 publications: 253 scientists 175–184 publications: 276 scientists 185–194 publications: 190 scientists 195–204 publications: 233 scientists 205–214 publications: 207 scientists 215–224 publications: 198 scientists 225–234 publications: 155 scientists 235–244 publications: 161 scientists 245–254 publications: 160 scientists 255–264 publications: 146 scientists 265–274 publications: 139 scientists 275–284 publications: 148 scientists 285–294 publications: 115 scientists 295–304 publications: 96 scientists 305–314 publications: 88 scientists 315–324 publications: 106 scientists 325–334 publications: 65 scientists 335–344 publications: 76 scientists 345–354 publications: 64 scientists 355–364 publications: 62 scientists 365–374 publications: 65 scientists 375–384 publications: 61 scientists 385–394 publications: 34 scientists 395–404 publications: 44 scientists 405–414 publications: 36 scientists 415–424 publications: 35 scientists 425–434 publications: 29 scientists 435–444 publications: 33 scientists 445–454 publications: 34 scientists 455–464 publications: 25 scientists 465–474 publications: 26 scientists 475–484 publications: 20 scientists 485–494 publications: 19 scientists 495–504 publications: 16 scientists 505–514 publications: 17 scientists 515–524 publications: 23 scientists 525–534 publications: 14 scientists 535–544 publications: 14 scientists 545–554 publications: 18 scientists 555–564 publications: 12 scientists 565–574 publications: 7 scientists 575–584 publications: 9 scientists 585–594 publications: 9 scientists 595–604 publications: 9 scientists 605–614 publications: 7 scientists 615–624 publications: 9 scientists 625–634 publications: 7 scientists 635–644 publications: 4 scientists 645–654 publications: 5 scientists 655–664 publications: 6 scientists 665–674 publications: 7 scientists 675–678 publications: 3 scientists 679+ publications: 99 scientists
55 publications 679+

This scientist: 257 publications — 67th percentile

67% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 679 publications or more.

Stephen J. Giovannoni D-index placement in Microbiology in 2026

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

40 D-Index: 30 scientists 41 D-Index: 86 scientists 42 D-Index: 90 scientists 43 D-Index: 117 scientists 44 D-Index: 122 scientists 45 D-Index: 123 scientists 46 D-Index: 108 scientists 47 D-Index: 110 scientists 48 D-Index: 106 scientists 49 D-Index: 109 scientists 50 D-Index: 129 scientists 51 D-Index: 111 scientists 52 D-Index: 116 scientists 53 D-Index: 127 scientists 54 D-Index: 134 scientists 55 D-Index: 134 scientists 56 D-Index: 111 scientists 57 D-Index: 136 scientists 58 D-Index: 162 scientists 59 D-Index: 151 scientists 60 D-Index: 139 scientists 61 D-Index: 122 scientists 62 D-Index: 126 scientists 63 D-Index: 144 scientists 64 D-Index: 109 scientists 65 D-Index: 103 scientists 66 D-Index: 124 scientists 67 D-Index: 112 scientists 68 D-Index: 103 scientists 69 D-Index: 131 scientists 70 D-Index: 93 scientists 71 D-Index: 93 scientists 72 D-Index: 96 scientists 73 D-Index: 92 scientists 74 D-Index: 80 scientists 75 D-Index: 66 scientists 76 D-Index: 87 scientists 77 D-Index: 60 scientists 78 D-Index: 73 scientists 79 D-Index: 59 scientists 80 D-Index: 57 scientists 81 D-Index: 55 scientists 82 D-Index: 47 scientists 83 D-Index: 77 scientists 84 D-Index: 50 scientists 85 D-Index: 45 scientists 86 D-Index: 42 scientists 87 D-Index: 41 scientists 88 D-Index: 32 scientists 89 D-Index: 38 scientists 90 D-Index: 35 scientists 91 D-Index: 34 scientists 92 D-Index: 27 scientists 93 D-Index: 26 scientists 94 D-Index: 33 scientists 95 D-Index: 22 scientists 96 D-Index: 37 scientists 97 D-Index: 22 scientists 98 D-Index: 21 scientists 99 D-Index: 22 scientists 100 D-Index: 30 scientists 101 D-Index: 16 scientists 102 D-Index: 20 scientists 103 D-Index: 17 scientists 104 D-Index: 19 scientists 105 D-Index: 16 scientists 106 D-Index: 19 scientists 107 D-Index: 18 scientists 108 D-Index: 14 scientists 109 D-Index: 10 scientists 110 D-Index: 9 scientists 111 D-Index: 7 scientists 112 D-Index: 11 scientists 113 D-Index: 6 scientists 114 D-Index: 15 scientists 115 D-Index: 10 scientists 116 D-Index: 12 scientists 117 D-Index: 7 scientists 118 D-Index: 10 scientists 119 D-Index: 10 scientists 120 D-Index: 11 scientists 121 D-Index: 2 scientists 122 D-Index: 7 scientists 123 D-Index: 12 scientists 124 D-Index: 5 scientists 125 D-Index: 9 scientists 126 D-Index: 6 scientists 127+ D-Index: 95 scientists
40 D-Index 127+

This scientist: 98 D-Index — 92nd percentile

92% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 127 D-Index or more.

Research.com Recognitions

  • 2011 - Dupont Industrial Biosciences Award in Applied and Environmental Microbiology, American Society for Microbiology

Overview

Stephen J. Giovannoni is affiliated with Oregon State University in the United States. Their research spans several fields, primarily focusing on Environmental Science, Biochemistry, Genetics and Molecular Biology, and Earth and Planetary Sciences. Within these broader domains, their work touches on key subfields such as Ecology, Molecular Biology, and Oceanography.

The central topics of Giovannoni's research include Microbial Community Ecology and Physiology, Marine and Coastal Ecosystems, Protist Diversity and Phylogeny, Genomics and Phylogenetic Studies, Marine Biology and Ecology Research, Ocean Acidification Effects and Responses, and Atmospheric Chemistry and Aerosols.

Frequent collaboration with several researchers has been a part of their scientific outputs. Regular coauthors include Luis M. Bolaños, Craig A. Carlson, Alexandra Z. Worden, Rachel Parsons, and Stephen E. Noell.

Giovannoni has published extensively across select scientific venues, with numerous articles appearing in:

  • bioRxiv (Cold Spring Harbor Laboratory)
  • Frontiers in Microbiology
  • Frontiers in Marine Science
  • mBio
  • ISME Communications

Some of the recent prominent papers authored or coauthored by Giovannoni are:

  • "Small phytoplankton dominate western North Atlantic biomass" (2020), The ISME Journal
  • "Pangenomics Analysis Reveals Diversification of Enzyme Families and Niche Specialization in Globally Abundant SAR202 Bacteria" (2020), mBio
  • "Different carboxyl-rich alicyclic molecules proxy compounds select distinct bacterioplankton for oxidation of dissolved organic matter in the mesopelagic Sargasso Sea" (2020), Limnology and Oceanography
  • "Seasonality of the Microbial Community Composition in the North Atlantic" (2021), Frontiers in Marine Science
  • "Seasonal and Geographical Transitions in Eukaryotic Phytoplankton Community Structure in the Atlantic and Pacific Oceans" (2020), Frontiers in Microbiology

Their contributions to applied and environmental microbiology were recognized by the Dupont Industrial Biosciences Award in Applied and Environmental Microbiology, awarded by the American Society for Microbiology in 2011.

Best Publications

  • The Uncultured Microbial Majority

    Michael S. Rappé;Stephen J. Giovannoni

  • Bias caused by template annealing in the amplification of mixtures of 16S rRNA genes by PCR.

    M T Suzuki;S J Giovannoni

  • Genetic diversity in Sargasso Sea bacterioplankton.

    Stephen J. Giovannoni;Theresa B. Britschgi;Craig L. Moyer;Katharine G. Field

  • Microbial ecology and evolution: a ribosomal RNA approach.

    G J Olsen;D J Lane;S J Giovannoni;N R Pace

  • Genome Streamlining in a Cosmopolitan Oceanic Bacterium

    Stephen J. Giovannoni;H. James Tripp;Scott Givan;Mircea Podar

  • SAR11 clade dominates ocean surface bacterioplankton communities

    Robert M. Morris;Michael S. Rappé;Stephanie A. Connon;Kevin L. Vergin

  • Geobacter metallireducens gen. nov. sp. nov., a microorganism capable of coupling the complete oxidation of organic compounds to the reduction of iron and other metals.

    D. R. Lovley;S. J. Giovannoni;D. C. White;J. E. Champine

  • Cultivation of the ubiquitous SAR11 marine bacterioplankton clade

    Michael S. Rappé;Stephanie A. Connon;Kevin L. Vergin;Stephen J. Giovannoni

  • High-Throughput Methods for Culturing Microorganisms in Very-Low-Nutrient Media Yield Diverse New Marine Isolates

    Stephanie A. Connon;Stephen J. Giovannoni

  • Phylogenetic group-specific oligodeoxynucleotide probes for identification of single microbial cells.

    S. J. Giovannoni;E. F. DeLong;Gary J Olsen;N. R. Pace

  • Rethinking the marine carbon cycle: Factoring in the multifarious lifestyles of microbes

    Alexandra Z. Worden;Alexandra Z. Worden;Alexandra Z. Worden;Michael J. Follows;Stephen J. Giovannoni;Susanne Wilken

  • Molecular phylogeny of the animal kingdom

    Katharine G. Field;Gary J. Olsen;David J. Lane;Stephen J. Giovannoni

  • Implications of streamlining theory for microbial ecology

    Stephen J Giovannoni;J Cameron Thrash;J Cameron Thrash;Ben Temperton;Ben Temperton

  • Evolutionary relationships among cyanobacteria and green chloroplasts.

    S. J. Giovannoni;S. Turner;Gary J Olsen;S. Barns

  • Evolution, diversity, and molecular ecology of marine prokaryotes

    S. Giovannoni;Rappé

  • Molecular diversity and ecology of microbial plankton

    Stephen J. Giovannoni;Ulrich Stingl

  • SAR11 Bacteria: The Most Abundant Plankton in the Oceans.

    Stephen J. Giovannoni

  • Genetic comparisons reveal the same unknown bacterial lineages in Atlantic and Pacific bacterioplankton communities

    Thomas D. Mullins;Theresa B. Britschgi;Robin L. Krest;Stephen J. Giovannoni

  • Perennial Antarctic lake ice : An oasis for life in a polar desert

    John C. Priscu;Christian H. Fritsen;Edward E. Adams;Stephen J. Giovannoni

  • Cultivation and Growth Characteristics of a Diverse Group of Oligotrophic Marine Gammaproteobacteria

    Jang Cheon Cho;Stephen J. Giovannoni

  • Kinetic Bias in Estimates of Coastal Picoplankton Community Structure Obtained by Measurements of Small-Subunit rRNA Gene PCR Amplicon Length Heterogeneity

    Marcelino Suzuki;Michael S. Rappé;Stephen J. Giovannoni

Frequent Co-Authors

Craig A. Carlson
Craig A. Carlson University of California, Santa Barbara
Alexandra Z. Worden
Alexandra Z. Worden Marine Biological Laboratory
Martin R. Fisk
Martin R. Fisk Oregon State University
Norman R. Pace
Norman R. Pace University of Colorado Boulder
Gary J. Olsen
Gary J. Olsen University of Illinois at Urbana-Champaign
William E. Sandine
William E. Sandine Oregon State University
Ramunas Stepanauskas
Ramunas Stepanauskas Bigelow Laboratory For Ocean Sciences
Richard W. Castenholz
Richard W. Castenholz University of Oregon
Michael J. Behrenfeld
Michael J. Behrenfeld Oregon State University
Mary S. Lipton
Mary S. Lipton Pacific Northwest National Laboratory

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