World's Best Scientists 2026 revealed!
Ioannis Leonardos

Ioannis Leonardos

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Ecology and Evolution 30 8380 8108 29 29 83 2632

Ioannis Leonardos publications per year

The chart shows the history of publications by Ioannis Leonardos between 1997 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Ioannis Leonardos published across 29 years, from 1997 to 2025, averaging 3.4 papers a year. Output peaked at 10 publications in 2012. 9 of the 100 publications appeared in the last two years.

No. of publications
2 4 6 8 10
Bar chart. Horizontal axis: year, 1997 to 2025. Vertical axis: number of publications, 0 to 10. Peak 10 publications in 2012. 1997: 1 publication 1998: 1 publication 1999: 1 publication 2000: 1 publication 2001: 1 publication 2002: 0 publications 2003: 1 publication 2004: 4 publications 2005: 1 publication 2006: 3 publications 2007: 3 publications 2008: 9 publications 2009: 4 publications 2010: 7 publications 2011: 4 publications 2012: 10 publications 2013: 5 publications 2014: 7 publications 2015: 4 publications 2016: 1 publication 2017: 4 publications 2018: 2 publications 2019: 2 publications 2020: 5 publications 2021: 2 publications 2022: 4 publications 2023: 4 publications 2024: 3 publications 2025: 6 publications
1997 2025

100 publications in total across all disciplines

View publications per year as a table
Ioannis Leonardos: publications per year, 1997 to 2025
Year Publications
1997 1
1998 1
1999 1
2000 1
2001 1
2002 0
2003 1
2004 4
2005 1
2006 3
2007 3
2008 9
2009 4
2010 7
2011 4
2012 10
2013 5
2014 7
2015 4
2016 1
2017 4
2018 2
2019 2
2020 5
2021 2
2022 4
2023 4
2024 3
2025 6
Total 100
Download as CSV

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.

No. of scientists
100 200 300
Bar chart with 100 bars. Horizontal axis: publications, 37–41 to 531+. Vertical axis: number of scientists, 0 to 333. Most scientists, 333, have 97–101 publications. The last bar groups every scientist with 531 publications or more. The highlighted bar, 82–86 publications, is where this scientist sits. 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
37–41 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.

View publications distribution as a table
Number of Ecology and Evolution scientists by publication count, Research.com 2026 ranking edition. Based on 8,381 ranked scientists.
Publications Scientists This scientist
37–41 2
42–46 9
47–51 10
52–56 31
57–61 56
62–66 91
67–71 92
72–76 127
77–81 173
82–86 236 83
87–91 227
92–96 240
97–101 333
102–106 280
107–111 300
112–116 285
117–121 305
122–126 287
127–131 278
132–136 289
137–141 273
142–146 262
147–151 246
152–156 235
157–161 205
162–166 199
167–171 174
172–176 164
177–181 173
182–186 189
187–191 170
192–196 139
197–201 128
202–206 117
207–211 115
212–216 107
217–221 124
222–226 81
227–231 82
232–236 85
237–241 75
242–246 66
247–251 81
252–256 69
257–261 70
262–266 55
267–271 64
272–276 49
277–281 48
282–286 44
287–291 45
292–296 36
297–301 39
302–306 38
307–311 30
312–316 34
317–321 25
322–326 22
327–331 28
332–336 30
337–341 22
342–346 30
347–351 26
352–356 22
357–361 29
362–366 21
367–371 12
372–376 18
377–381 17
382–386 13
387–391 21
392–396 13
397–401 10
402–406 15
407–411 8
412–416 9
417–421 8
422–426 4
427–431 10
432–436 10
437–441 5
442–446 4
447–451 10
452–456 2
457–461 4
462–466 7
467–471 7
472–476 6
477–481 6
482–486 3
487–491 3
492–496 4
497–501 4
502–506 8
507–511 5
512–516 4
517–521 5
522–526 4
527–530 5
531+ 100
Download as CSV

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.

No. of scientists
50 100 150 200 250
Bar chart with 92 bars. Horizontal axis: D-Index, 30 to 121+. Vertical axis: number of scientists, 0 to 280. Most scientists, 280, have 40 D-Index. The last bar groups every scientist with 121 D-Index or more. The highlighted bar, 30 D-Index, is where this scientist sits. 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.

View D-Index distribution as a table
Number of Ecology and Evolution scientists by D-index, Research.com 2026 ranking edition. Based on 8,381 ranked scientists.
D-Index Scientists This scientist
30 95 30
31 123
32 191
33 245
34 252
35 244
36 249
37 244
38 254
39 254
40 280
41 274
42 266
43 233
44 248
45 208
46 201
47 213
48 207
49 172
50 209
51 199
52 153
53 169
54 163
55 148
56 120
57 146
58 137
59 140
60 104
61 119
62 118
63 99
64 77
65 100
66 86
67 83
68 75
69 94
70 57
71 68
72 59
73 63
74 66
75 60
76 42
77 49
78 39
79 37
80 43
81 41
82 45
83 34
84 40
85 35
86 55
87 24
88 24
89 30
90 23
91 25
92 27
93 27
94 13
95 23
96 12
97 14
98 19
99 16
100 14
101 5
102 21
103 16
104 10
105 7
106 7
107 7
108 6
109 9
110 11
111 12
112 9
113 7
114 3
115 8
116 5
117 11
118 4
119 2
120 5
121+ 100
Download as CSV

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

If you think any of the details on this page are incorrect, let us know.

Report an issue

We appreciate your kind effort to assist us to improve this page, it would be helpful providing us with as much detail as possible in the text box below:

Related Online Degrees & Career Pathways

Studying Ecology and Evolution opens the door to a range of interdisciplinary careers. Many students and professionals complement their science backgrounds with skills in mental health, counseling, or psychology. For those interested in blending ecological research with human-focused health support, consider the online masters mental health counseling. This program can prepare graduates for roles addressing the mental wellbeing of communities impacted by environmental change.

Another growing field is forensic psychology, where specialists analyze the intersection between human behavior and the law. Exploring highest paying forensic psychology jobs may inspire ecology-minded students to apply their critical thinking skills in legal, government, or policy settings.

Those passionate about supporting youth can benefit from an online child psychology degree, working with children affected by environmental trauma. Additionally, options like affordable masters in counseling programs make it feasible to gain counseling credentials alongside your STEM expertise, broadening your impact across the human and environmental spectrum.

Best Scientists Citing Ioannis Leonardos

Trending Scientists

Recently Published Articles