World's Best Scientists 2026 revealed!
Ioannis Leonardos

Ioannis Leonardos

D-Index & Metrics

Ecology and Evolution

D-Index
30
Citations
2632
World Ranking
8380
National Ranking
29

Ioannis Leonardos publication distribution in Ecology and Evolution in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Ecology and Evolution in 2026. The highlighted bar marks where Ioannis Leonardos sits on this spectrum.

37–41 publications: 2 scientists 42–46 publications: 9 scientists 47–51 publications: 10 scientists 52–56 publications: 31 scientists 57–61 publications: 56 scientists 62–66 publications: 91 scientists 67–71 publications: 92 scientists 72–76 publications: 127 scientists 77–81 publications: 173 scientists 82–86 publications: 236 scientists 87–91 publications: 227 scientists 92–96 publications: 240 scientists 97–101 publications: 333 scientists 102–106 publications: 280 scientists 107–111 publications: 300 scientists 112–116 publications: 285 scientists 117–121 publications: 305 scientists 122–126 publications: 287 scientists 127–131 publications: 278 scientists 132–136 publications: 289 scientists 137–141 publications: 273 scientists 142–146 publications: 262 scientists 147–151 publications: 246 scientists 152–156 publications: 235 scientists 157–161 publications: 205 scientists 162–166 publications: 199 scientists 167–171 publications: 174 scientists 172–176 publications: 164 scientists 177–181 publications: 173 scientists 182–186 publications: 189 scientists 187–191 publications: 170 scientists 192–196 publications: 139 scientists 197–201 publications: 128 scientists 202–206 publications: 117 scientists 207–211 publications: 115 scientists 212–216 publications: 107 scientists 217–221 publications: 124 scientists 222–226 publications: 81 scientists 227–231 publications: 82 scientists 232–236 publications: 85 scientists 237–241 publications: 75 scientists 242–246 publications: 66 scientists 247–251 publications: 81 scientists 252–256 publications: 69 scientists 257–261 publications: 70 scientists 262–266 publications: 55 scientists 267–271 publications: 64 scientists 272–276 publications: 49 scientists 277–281 publications: 48 scientists 282–286 publications: 44 scientists 287–291 publications: 45 scientists 292–296 publications: 36 scientists 297–301 publications: 39 scientists 302–306 publications: 38 scientists 307–311 publications: 30 scientists 312–316 publications: 34 scientists 317–321 publications: 25 scientists 322–326 publications: 22 scientists 327–331 publications: 28 scientists 332–336 publications: 30 scientists 337–341 publications: 22 scientists 342–346 publications: 30 scientists 347–351 publications: 26 scientists 352–356 publications: 22 scientists 357–361 publications: 29 scientists 362–366 publications: 21 scientists 367–371 publications: 12 scientists 372–376 publications: 18 scientists 377–381 publications: 17 scientists 382–386 publications: 13 scientists 387–391 publications: 21 scientists 392–396 publications: 13 scientists 397–401 publications: 10 scientists 402–406 publications: 15 scientists 407–411 publications: 8 scientists 412–416 publications: 9 scientists 417–421 publications: 8 scientists 422–426 publications: 4 scientists 427–431 publications: 10 scientists 432–436 publications: 10 scientists 437–441 publications: 5 scientists 442–446 publications: 4 scientists 447–451 publications: 10 scientists 452–456 publications: 2 scientists 457–461 publications: 4 scientists 462–466 publications: 7 scientists 467–471 publications: 7 scientists 472–476 publications: 6 scientists 477–481 publications: 6 scientists 482–486 publications: 3 scientists 487–491 publications: 3 scientists 492–496 publications: 4 scientists 497–501 publications: 4 scientists 502–506 publications: 8 scientists 507–511 publications: 5 scientists 512–516 publications: 4 scientists 517–521 publications: 5 scientists 522–526 publications: 4 scientists 527–530 publications: 5 scientists 531+ publications: 100 scientists
37 publications 531+

This scientist: 83 publications — 8th percentile

8% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 531 publications or more.

Ioannis Leonardos D-index placement in Ecology and Evolution in 2026

The chart shows the D-index (discipline H-index) distribution of Ecology and Evolution scientists ranked by Research.com in 2026. The highlighted bar marks where Ioannis Leonardos sits on this spectrum.

30 D-Index: 95 scientists 31 D-Index: 123 scientists 32 D-Index: 191 scientists 33 D-Index: 245 scientists 34 D-Index: 252 scientists 35 D-Index: 244 scientists 36 D-Index: 249 scientists 37 D-Index: 244 scientists 38 D-Index: 254 scientists 39 D-Index: 254 scientists 40 D-Index: 280 scientists 41 D-Index: 274 scientists 42 D-Index: 266 scientists 43 D-Index: 233 scientists 44 D-Index: 248 scientists 45 D-Index: 208 scientists 46 D-Index: 201 scientists 47 D-Index: 213 scientists 48 D-Index: 207 scientists 49 D-Index: 172 scientists 50 D-Index: 209 scientists 51 D-Index: 199 scientists 52 D-Index: 153 scientists 53 D-Index: 169 scientists 54 D-Index: 163 scientists 55 D-Index: 148 scientists 56 D-Index: 120 scientists 57 D-Index: 146 scientists 58 D-Index: 137 scientists 59 D-Index: 140 scientists 60 D-Index: 104 scientists 61 D-Index: 119 scientists 62 D-Index: 118 scientists 63 D-Index: 99 scientists 64 D-Index: 77 scientists 65 D-Index: 100 scientists 66 D-Index: 86 scientists 67 D-Index: 83 scientists 68 D-Index: 75 scientists 69 D-Index: 94 scientists 70 D-Index: 57 scientists 71 D-Index: 68 scientists 72 D-Index: 59 scientists 73 D-Index: 63 scientists 74 D-Index: 66 scientists 75 D-Index: 60 scientists 76 D-Index: 42 scientists 77 D-Index: 49 scientists 78 D-Index: 39 scientists 79 D-Index: 37 scientists 80 D-Index: 43 scientists 81 D-Index: 41 scientists 82 D-Index: 45 scientists 83 D-Index: 34 scientists 84 D-Index: 40 scientists 85 D-Index: 35 scientists 86 D-Index: 55 scientists 87 D-Index: 24 scientists 88 D-Index: 24 scientists 89 D-Index: 30 scientists 90 D-Index: 23 scientists 91 D-Index: 25 scientists 92 D-Index: 27 scientists 93 D-Index: 27 scientists 94 D-Index: 13 scientists 95 D-Index: 23 scientists 96 D-Index: 12 scientists 97 D-Index: 14 scientists 98 D-Index: 19 scientists 99 D-Index: 16 scientists 100 D-Index: 14 scientists 101 D-Index: 5 scientists 102 D-Index: 21 scientists 103 D-Index: 16 scientists 104 D-Index: 10 scientists 105 D-Index: 7 scientists 106 D-Index: 7 scientists 107 D-Index: 7 scientists 108 D-Index: 6 scientists 109 D-Index: 9 scientists 110 D-Index: 11 scientists 111 D-Index: 12 scientists 112 D-Index: 9 scientists 113 D-Index: 7 scientists 114 D-Index: 3 scientists 115 D-Index: 8 scientists 116 D-Index: 5 scientists 117 D-Index: 11 scientists 118 D-Index: 4 scientists 119 D-Index: 2 scientists 120 D-Index: 5 scientists 121+ D-Index: 100 scientists
30 D-Index 121+

This scientist: 30 D-Index — 1st percentile

1% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 121 D-Index or more.

Overview

Ioannis Leonardos is affiliated with the University of Ioannina in Greece and has a multidisciplinary research portfolio spanning Environmental Science, Biochemistry, Genetics and Molecular Biology, and Medicine. Their work draws on multiple fields with a particular focus on Molecular Biology, Genetics, Ecology, Radiology, Nuclear Medicine and Imaging, and Cell Biology.

The scientist's research covers several main topics, including Zebrafish Biomedical Research Applications, Glioma Diagnosis and Treatment, Fish Biology and Ecology Studies, Radiopharmaceutical Chemistry and Applications, Medical Imaging Techniques and Applications, and Identification and Quantification in Food.

Leonardos's recent publications illustrate this breadth with works such as:

  • "Glioblastoma research on zebrafish xenograft models: a systematic review," 2023, published in Clinical & Translational Oncology
  • "Curcumin and Radiotherapy Exert Synergistic Anti-Glioma Effect In Vitro," 2021, published in Biomedicines
  • "DNA barcoding identification of Greek freshwater fishes," 2022, published in PLoS ONE
  • "Cannabinol in the spotlight: Toxicometabolomic study and behavioral analysis of zebrafish embryos exposed to the unknown cannabinoid," 2020, published in Chemosphere
  • "Constrained by aliens, shifting landscape, or poor water quality? Factors affecting the persistence of amphibians in an urban pond network," 2020, published in Aquatic Conservation Marine and Freshwater Ecosystems

Frequent coauthors in Leonardos's research include:

  • Ieremias Chousidis
  • Theodoros Chatzimitakos
  • Constantine D. Stalikas
  • Vasiliki Zoi
  • Andreas G. Tzakos

Leonardos has contributed multiple papers to a variety of publication venues, with repeated contributions to:

  • Fishes
  • Journal of Applied Ichthyology
  • Journal of Mathematics and Science Teacher
  • Preprints.org
  • Clinical & Translational Oncology

The scientist's work notably intersects biomedical research and ecology, with particular emphasis on studying zebrafish models for disease application, glioma treatment approaches, and freshwater fish ecology and identification. This mix of applied and basic research topics supports a cross-disciplinary approach to both environmental and medical scientific challenges.

Best Publications

  • Length–weight relationships of an invasive cyprinid fish (Carassius gibelio) from 12 Greek lakes in relation to their trophic states

    M. Tsoumani;R. Liasko;P. Moutsaki;I. Kagalou

  • Long term changes in the eutrophication process in a shallow Mediterranean lake ecosystem of W. Greece: response after the reduction of external load.

    I. Kagalou;E. Papastergiadou;I. Leonardos

  • Assessment of microcystin distribution and biomagnification in tissues of aquatic food web compartments from a shallow lake and evaluation of potential risks to public health

    Theodoti Papadimitriou;Ifigenia Kagalou;Constantinos Stalikas;Georgios Pilidis

  • Speciation of phosphorus fractionation in river sediments by explanatory data analysis.

    Christos Z. Katsaounos;Dimosthenis L. Giokas;Ioannis D. Leonardos;Miltiades I. Karayannis

  • Anthropogenic and climate-induced change favors toxic cyanobacteria blooms: Evidence from monitoring a highly eutrophic, urban Mediterranean lake

    Spyros Gkelis;Theodoti Papadimitriou;Nikos Zaoutsos;Ioannis Leonardos

  • Accumulation of microcystins in water and fish tissues: an estimation of risks associated with microcystins in most of the Greek Lakes.

    Theodoti Papadimitriou;Ifigenia Kagalou;Vasilios Bacopoulos;Ioannis D. Leonardos

  • Biogeography of freshwater fishes of the Balkan Peninsula

    Anthi Oikonomou;Fabien Leprieur;Ioannis D. Leonardos

  • The effect of sea bream (Sparus aurata) broodstock and larval vaccination on the susceptibility by Photobacterium damsela subsp. piscicida and on the humoral immune parameters

    A Hanif;V Bakopoulos;I Leonardos;G J Dimitriadis

  • Reproductive strategy of Aphanius fasciatus Nardo, 1827 (Pisces: Cyprinodontidae) in the Mesolongi and Etolikon lagoons (W. Greece)

    Ioannis Leonardos;Apostolos Sinis

  • The DPSIR Approach for an Integrated River Management Framework. A Preliminary Application on a Mediterranean Site (Kalamas River -NW Greece)

    Ifigenia Kagalou;Ioannis Leonardos;Chryssa Anastasiadou;Christos Neofytou

  • Age, growth and mortality of Atherina boyeri Risso, 1810 (Pisces: Atherinidae) in the Mesolongi and Etolikon lagoons (W. Greece)

    Ioannis Leonardos;Apostolos Sinis

  • Fish fauna in a Protected Greek lake: biodiversity, introduced fish species over a 80-year period and their impacts on the ecosystem

    I. D. Leonardos;I. Kagalou;M. Tsoumani;P. S. Economidis

  • Population age and sex structure of Aphanius fasciatus Nardo, 1827 (Pisces: Cyprinodontidae) in the Mesolongi and Etolikon Lagoons (W. Greece)

    Ioannis Leonardos;Apostolos Sinis

  • Host-parasite relationships: occurrence and effect of the parasitic isopod Mothocya epimerica on sand smelt Atherina boyeri in the Mesolongi and Etolikon Lagoons (W. Greece).

    Ioannis Leonardos;Jean-Paul Trilles

  • Effects of Anthropogenic Influences on the Trophic State, Land Uses and Aquatic Vegetation in a Shallow Mediterranean Lake: Implications for Restoration

    E. Papastergiadou;I. Kagalou;K. Stefanidis;A. Retalis

  • Human fingernails as an intriguing precursor for the synthesis of nitrogen and sulfur-doped carbon dots with strong fluorescent properties: Analytical and bioimaging applications

    Theodoros Chatzimitakos;Athanasia Kasouni;Lamprini Sygellou;Ioannis Leonardos

  • Ecology and exploitation pattern of a landlocked population of sand smelt, Atherina boyeri (Risso 1810), in Trichonis Lake (western Greece)

    I. D. Leonardos

  • Life history characteristics of an invasive cyprinid fish (Carassius gibelio) in Chimaditis Lake (northern Greece)

    I. D. Leonardos;A. C. Tsikliras;V. Eleftheriou;Y. Cladas

  • Assessment of microcystins in lake water and the omnivorous fish ( Carassius gibelio , Bloch) in Lake Pamvotis (Greece) containing dense cyanobacterial bloom

    Ifigenia Kagalou;Theodoti Papadimitriou;Vasilios Bacopoulos;Ioannis Leonardos

  • Assessment of a Mediterranean shallow lentic ecosystem (Lake Pamvotis, Greece) using benthic community diversity: Response to environmental parameters

    Ifigenia Kagalou;Georgios Economidis;Ioannis Leonardos;Constantinos Papaloukas

  • Biometric analysis of lacustrine and riverine populations of Palemonetes antennarius (H. Milne-Edwards, 1837) (Crustacea, Decapoda, Palaemonidae) from north-western Greece

    Chryssa Anastasiadou;Roman Liasko;Ioannis D. Leonardos

  • Life history pattern and feeding habits of the invasive mosquitofish, Gambusia holbrooki, in Lake Pamvotis (NW Greece)

    Christos Gkenas;Anthi Oikonomou;Andreas Economou;Fane Kiosse

Frequent Co-Authors

Constantine D. Stalikas
Constantine D. Stalikas University of Ioannina
Fabien Leprieur
Fabien Leprieur University of Montpellier
Francisco Amat
Francisco Amat Spanish National Research Council

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