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Ecology and Evolution
South Africa
2026
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Plant Science and Agronomy
South Africa
2026

D-Index & Metrics

Plant Science and Agronomy

D-Index
87
Citations
24795
World Ranking
320
National Ranking
3

Ecology and Evolution

D-Index
88
Citations
24829
World Ranking
530
National Ranking
6

Steven D. Johnson publication distribution in Plant Science and Agronomy in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Plant Science and Agronomy in 2026. The highlighted bar marks where Steven D. Johnson sits on this spectrum.

36–40 publications: 2 scientists 41–45 publications: 7 scientists 46–50 publications: 40 scientists 51–55 publications: 58 scientists 56–60 publications: 60 scientists 61–65 publications: 107 scientists 66–70 publications: 130 scientists 71–75 publications: 153 scientists 76–80 publications: 191 scientists 81–85 publications: 199 scientists 86–90 publications: 206 scientists 91–95 publications: 218 scientists 96–100 publications: 226 scientists 101–105 publications: 227 scientists 106–110 publications: 247 scientists 111–115 publications: 255 scientists 116–120 publications: 253 scientists 121–125 publications: 233 scientists 126–130 publications: 219 scientists 131–135 publications: 201 scientists 136–140 publications: 194 scientists 141–145 publications: 176 scientists 146–150 publications: 157 scientists 151–155 publications: 147 scientists 156–160 publications: 151 scientists 161–165 publications: 159 scientists 166–170 publications: 137 scientists 171–175 publications: 128 scientists 176–180 publications: 126 scientists 181–185 publications: 98 scientists 186–190 publications: 114 scientists 191–195 publications: 100 scientists 196–200 publications: 90 scientists 201–205 publications: 71 scientists 206–210 publications: 98 scientists 211–215 publications: 70 scientists 216–220 publications: 86 scientists 221–225 publications: 61 scientists 226–230 publications: 58 scientists 231–235 publications: 53 scientists 236–240 publications: 64 scientists 241–245 publications: 39 scientists 246–250 publications: 46 scientists 251–255 publications: 51 scientists 256–260 publications: 36 scientists 261–265 publications: 44 scientists 266–270 publications: 35 scientists 271–275 publications: 30 scientists 276–280 publications: 33 scientists 281–285 publications: 35 scientists 286–290 publications: 36 scientists 291–295 publications: 26 scientists 296–300 publications: 26 scientists 301–305 publications: 31 scientists 306–310 publications: 30 scientists 311–315 publications: 21 scientists 316–320 publications: 29 scientists 321–325 publications: 14 scientists 326–330 publications: 15 scientists 331–335 publications: 15 scientists 336–340 publications: 17 scientists 341–345 publications: 15 scientists 346–350 publications: 12 scientists 351–355 publications: 17 scientists 356–360 publications: 18 scientists 361–365 publications: 12 scientists 366–370 publications: 11 scientists 371–375 publications: 6 scientists 376–380 publications: 6 scientists 381–385 publications: 11 scientists 386–390 publications: 9 scientists 391–395 publications: 10 scientists 396–400 publications: 8 scientists 401–405 publications: 4 scientists 406–410 publications: 9 scientists 411–415 publications: 11 scientists 416–420 publications: 4 scientists 421–425 publications: 7 scientists 426–430 publications: 4 scientists 431–435 publications: 3 scientists 436–440 publications: 5 scientists 441–445 publications: 8 scientists 446–450 publications: 6 scientists 451–455 publications: 7 scientists 456–460 publications: 5 scientists 461–465 publications: 6 scientists 466 publications: 2 scientists 467+ publications: 99 scientists
36 publications 467+

This scientist: 404 publications — 97th percentile

97% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 467 publications or more.

Steven D. Johnson D-index placement in Plant Science and Agronomy in 2026

The chart shows the D-index (discipline H-index) distribution of Plant Science and Agronomy scientists ranked by Research.com in 2026. The highlighted bar marks where Steven D. Johnson sits on this spectrum.

30 D-Index: 200 scientists 31 D-Index: 236 scientists 32 D-Index: 253 scientists 33 D-Index: 283 scientists 34 D-Index: 288 scientists 35 D-Index: 240 scientists 36 D-Index: 246 scientists 37 D-Index: 243 scientists 38 D-Index: 247 scientists 39 D-Index: 229 scientists 40 D-Index: 232 scientists 41 D-Index: 230 scientists 42 D-Index: 228 scientists 43 D-Index: 219 scientists 44 D-Index: 193 scientists 45 D-Index: 164 scientists 46 D-Index: 158 scientists 47 D-Index: 143 scientists 48 D-Index: 131 scientists 49 D-Index: 127 scientists 50 D-Index: 122 scientists 51 D-Index: 122 scientists 52 D-Index: 110 scientists 53 D-Index: 102 scientists 54 D-Index: 98 scientists 55 D-Index: 79 scientists 56 D-Index: 85 scientists 57 D-Index: 88 scientists 58 D-Index: 91 scientists 59 D-Index: 62 scientists 60 D-Index: 61 scientists 61 D-Index: 59 scientists 62 D-Index: 54 scientists 63 D-Index: 61 scientists 64 D-Index: 59 scientists 65 D-Index: 58 scientists 66 D-Index: 41 scientists 67 D-Index: 49 scientists 68 D-Index: 39 scientists 69 D-Index: 32 scientists 70 D-Index: 40 scientists 71 D-Index: 47 scientists 72 D-Index: 38 scientists 73 D-Index: 28 scientists 74 D-Index: 29 scientists 75 D-Index: 28 scientists 76 D-Index: 22 scientists 77 D-Index: 21 scientists 78 D-Index: 25 scientists 79 D-Index: 26 scientists 80 D-Index: 19 scientists 81 D-Index: 16 scientists 82 D-Index: 12 scientists 83 D-Index: 16 scientists 84 D-Index: 14 scientists 85 D-Index: 11 scientists 86 D-Index: 17 scientists 87 D-Index: 13 scientists 88 D-Index: 10 scientists 89 D-Index: 12 scientists 90 D-Index: 18 scientists 91 D-Index: 16 scientists 92 D-Index: 16 scientists 93 D-Index: 17 scientists 94 D-Index: 12 scientists 95 D-Index: 8 scientists 96 D-Index: 9 scientists 97 D-Index: 9 scientists 98 D-Index: 11 scientists 99 D-Index: 12 scientists 100 D-Index: 5 scientists 101 D-Index: 8 scientists 102 D-Index: 4 scientists 103 D-Index: 11 scientists 104 D-Index: 5 scientists 105 D-Index: 9 scientists 106 D-Index: 7 scientists 107 D-Index: 4 scientists 108 D-Index: 8 scientists 109+ D-Index: 99 scientists
30 D-Index 109+

This scientist: 87 D-Index — 95th percentile

95% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 109 D-Index or more.

Research.com Recognitions

  • 2026 - Research.com Ecology and Evolution in South Africa Leader Award
  • 2026 - Research.com Plant Science and Agronomy in South Africa Leader Award
  • 2025 - Research.com Ecology and Evolution in South Africa Leader Award
  • 2025 - Research.com Plant Science and Agronomy in South Africa Leader Award
  • 2022 - Research.com Ecology and Evolution in South Africa Leader Award
  • 2022 - Research.com Plant Science and Agronomy in South Africa Leader Award

Overview

Steven D. Johnson is affiliated with the University of KwaZulu-Natal in South Africa. Their primary research focus lies within the Agricultural and Biological Sciences, with significant contributions across subfields including Ecology, Evolution, Behavior and Systematics, Plant Science, Nature and Landscape Conservation, Molecular Biology, and Insect Science.

The scientist's research topics encompass multiple themes, including:

  • Plant and animal studies
  • Plant Parasitism and Resistance
  • Ecology and Vegetation Dynamics Studies
  • Plant Reproductive Biology
  • Plant Diversity and Evolution
  • Insect and Pesticide Research
  • Plant and Fungal Species Descriptions

Their recent published papers are as follows:

  • A global-scale expert assessment of drivers and risks associated with pollinator decline, 2021, Nature Ecology & Evolution
  • Niche Perspectives on Plant-Pollinator Interactions, 2020, Trends in Plant Science
  • The role of plant-pollinator interactions in structuring nectar microbial communities, 2021, Journal of Ecology
  • Native honeybees as flower visitors and pollinators in wild plant communities in a biodiversity hotspot, 2020, Ecosphere
  • Sexual deception of a beetle pollinator through floral mimicry, 2021, Current Biology

Steven D. Johnson has collaborated frequently with several coauthors, including:

  • Timotheüs van der Niet (18 publications)
  • Adam Shuttleworth (9 publications)
  • Miguel Castañeda-Zárate (9 publications)
  • Jeremy J. Midgley (9 publications)
  • Bruce Anderson (7 publications)

The scientist's work has appeared regularly in the following publication venues:

  • South African Journal of Botany (9 publications)
  • Botanical Journal of the Linnean Society (8 publications)
  • Plant Biology (7 publications)
  • Annals of Botany (6 publications)
  • American Journal of Botany (4 publications)

Best Publications

  • Generalization versus specialization in plant pollination systems

    Steven D. Johnson;Kim E. Steiner

  • Mechanisms and evolution of deceptive pollination in orchids

    Jana Jersáková;Steven D. Johnson;Pavel Kindlmann

  • Pollinator-mediated evolution of floral signals

    Florian P. Schiestl;Steven D. Johnson

  • A global-scale expert assessment of drivers and risks associated with pollinator decline.

    Lynn V. Dicks;Lynn V. Dicks;Tom D. Breeze;Hien T. Ngo;Deepa Senapathi

  • Darwin's beautiful contrivances: evolutionary and functional evidence for floral adaptation

    Lawrence D. Harder;Steven D. Johnson

  • POLLINATION SUCCESS IN A DECEPTIVE ORCHID IS ENHANCED BY CO-OCCURRING REWARDING MAGNET PLANTS

    Steven D. Johnson;Craig I. Peter;L. Anders Nilsson;Jon Ågren

  • Long-tongued fly pollination and evolution of floral spur length in the Disa draconis complex (Orchidaceae)

    S. D. Johnson;K. E. Steiner

  • Reconnecting plants and pollinators: challenges in the restoration of pollination mutualisms

    Myles H.M. Menz;Ryan D. Phillips;Ryan D. Phillips;Ryan D. Phillips;Rachael Winfree;Claire Kremen

  • Phylogenetic evidence for pollinator-driven diversification of angiosperms.

    Timotheüs van der Niet;Timotheüs van der Niet;Steven D. Johnson

  • Pollinator-driven ecological speciation in plants: new evidence and future perspectives

    Timotheus Van der Niet;Timotheus Van der Niet;Timotheus Van der Niet;Rodney Peakall;Steven D. Johnson

  • Phylogeny and radiation of pollination systems in DISA (Orchidaceae).

    S. D. Johnson;H. P. Linder;K. E. Steiner

  • The pollination niche and its role in the diversification and maintenance of the southern African flora.

    Steven D. Johnson

  • THE GEOGRAPHICAL MOSAIC OF COEVOLUTION IN A PLANT–POLLINATOR MUTUALISM

    Bruce Anderson;Steven D. Johnson

  • Pollinator-mediated selection on flower-tube length in a hawkmoth-pollinated Gladiolus (Iridaceae)

    Ronny Alexandersson;Steven D Johnson

  • Consumptive emasculation: the ecological and evolutionary consequences of pollen theft.

    Anna L. Hargreaves;Lawrence D. Harder;Steven D. Johnson

  • The pollination ecology of an assemblage of grassland asclepiads in South Africa.

    Jeff Ollerton;Steven D. Johnson;Louise Cranmer;Sam Kellie

  • DARK, BITTER‐TASTING NECTAR FUNCTIONS AS A FILTER OF FLOWER VISITORS IN A BIRD‐POLLINATED PLANT

    Steven D. Johnson;Anna L. Hargreaves;Anna L. Hargreaves;Mark Brown

  • Evolutionary associations between nectar properties and specificity in bird pollination systems

    Steven D Johnson;Susan W Nicolson

  • Breeding systems of invasive alien plants in South Africa: does Baker's rule apply?

    Tendani D. Rambuda;Steven D. Johnson

  • POLLEN CARRYOVER, GEITONOGAMY, AND THE EVOLUTION OF DECEPTIVE POLLINATION SYSTEMS IN ORCHIDS

    S. D. Johnson;L. A. Nilsson

  • Function and Evolution of Aggregated Pollen in Angiosperms

    Lawrence D. Harder;Steven D. Johnson

  • Reproductive biology of Australian acacias: Important mediator of invasiveness?

    Michelle R. Gibson;David M. Richardson;Elizabete Marchante;Hélia Marchante;Hélia Marchante

  • The effects of nectar addition on pollen removal and geitonogamy in the non-rewarding orchid Anacamptis morio.

    Steven D. Johnson;Craig I. Peter;Jon Agren

  • Adaptive plasticity of floral display size in animal-pollinated plants.

    Lawrence D Harder;Steven D Johnson

  • Batesian mimicry in the non-rewarding orchid Disa pulchra, and its consequences for pollinator behaviour

    S. D. Johnson

Frequent Co-Authors

Jeremy J. Midgley
Jeremy J. Midgley University of Cape Town
Andreas Jürgens
Andreas Jürgens Technical University of Darmstadt
Lawrence D. Harder
Lawrence D. Harder University of Calgary
Colleen T. Downs
Colleen T. Downs University of KwaZulu-Natal
Allan G. Ellis
Allan G. Ellis Stellenbosch University
Ryan D. Phillips
Ryan D. Phillips La Trobe University
J. Van Staden
J. Van Staden University of KwaZulu-Natal
Florian P. Schiestl
Florian P. Schiestl University of Zurich
Robert A. Raguso
Robert A. Raguso Cornell University
Stefan Dötterl
Stefan Dötterl University of Salzburg

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