Top 100 Scientists

World Top 100 Scientists 2025

Top 100 scientists can be ranked globally or specific to the following regions including Africa, Asia, Europe, North America, Latin America, Oceania, Arab League, ASEAN, EECA, and BRICS based on total H-index scores without any breakdown by subject areas. Top 100 rankings in the world, in a continent, or a region include standardized subjects areas of Agriculture & Forestry, Arts, Design and Architecture, Business & Management, Economics & Econometrics, Education, Engineering & Technology, History, Philosophy, Theology, Law/Law and Legal Studies, Medical and Health Sciences, Natural Sciences, Social Sciences, Art and Humanities Rankings and Social Sciences and Humanities Rankings BETA VERSION. Subject field ranking in world, region, country and university is beta version since subject field "others" (873,690 scientists profile whose branch cannot be determined, not yet edited or determined) is excluded, so the ranking will change as the others fields are edited. Please note that. Subjects indicated as “ * others ” will not be included in the ranking by regions and subjects.

* Rankings
Ranking Based On Selection: 1
Rohit Ghai
Aquatic Microbial Ecology
Metagenomics
Comparative Genomics
Virus-host interactions
Bacteriophages
Metrics
H-Index
i10 Index
Citation
49
83
9,337
* Rankings
Ranking Based On Selection: 2
Josef Hejzlar
water chemistry
nutrient cycling
eutrophication
Metrics
H-Index
i10 Index
Citation
48
131
6,809
* Rankings
Ranking Based On Selection: 4
Martin Čech
fish ecology
fish behavior
diet of fish-eating birds and mammals
Metrics
H-Index
i10 Index
Citation
34
84
3,246
* Rankings
Ranking Based On Selection: 5
Michaela M Salcher
aquatic microbial ecology
microbial genomics
microbial evolution
Metrics
H-Index
i10 Index
Citation
33
54
3,452
* Rankings
Ranking Based On Selection: 9
Marek Šmejkal
conservation ecology
invasion biology
fish behaviour
reproduction
predator-prey interactions
Metrics
H-Index
i10 Index
Citation
20
35
1,075

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* Rankings
Ranking Based On Selection: 12
Tanja Shabarova
cave microbiology
microbial ecology
groundwater microbiology
Metrics
H-Index
i10 Index
Citation
16
16
879
* Rankings
Ranking Based On Selection: 13
Amin Golpour Dehsari
Fish reproduction
Reproductive Physiology
Environmental DNA
Ecology
Sustainable Fisheries
Metrics
H-Index
i10 Index
Citation
15
23
684
* Rankings
Ranking Based On Selection: 15
Million Tesfaye
Aquatic Ecology
Fish Biology
Ornithology
Metrics
H-Index
i10 Index
Citation
6
4
247
* Rankings
Ranking Based On Selection: 16
Paweł Markwitz
Biology
Microbiology
Genetics
Biotechnology
Bacteriophages
Metrics
H-Index
i10 Index
Citation
5
4
173
Rankings
Ranking Based On Selection: 1
Rohit Ghai
Metrics
H-Index
i10 Index
Citation Counts
49
83
9,337
Aquatic Microbial Ecology
Metagenomics
Comparative Genomics
Virus-host interactions
Bacteriophages
Rankings
Ranking Based On Selection: 2
Josef Hejzlar
Metrics
H-Index
i10 Index
Citation Counts
48
131
6,809
water chemistry
nutrient cycling
eutrophication
Rankings
Ranking Based On Selection: 3
Jan Kubečka
Metrics
H-Index
i10 Index
Citation Counts
44
138
6,081
Rankings
Ranking Based On Selection: 4
Martin Čech
Metrics
H-Index
i10 Index
Citation Counts
34
84
3,246
fish ecology
fish behavior
diet of fish-eating birds and mammals
Rankings
Ranking Based On Selection: 5
Michaela M Salcher
Metrics
H-Index
i10 Index
Citation Counts
33
54
3,452
aquatic microbial ecology
microbial genomics
microbial evolution
Rankings
Ranking Based On Selection: 6
Prchalova Marie
Metrics
H-Index
i10 Index
Citation Counts
27
52
2,255
Rankings
Ranking Based On Selection: 7
Milan Riha
Metrics
H-Index
i10 Index
Citation Counts
26
59
2,483
Rankings
Ranking Based On Selection: 8
Petr Znachor
Metrics
H-Index
i10 Index
Citation Counts
25
43
1,993
Rankings
Ranking Based On Selection: 9
Marek Šmejkal
Metrics
H-Index
i10 Index
Citation Counts
20
35
1,075
conservation ecology
invasion biology
fish behaviour
reproduction
predator-prey interactions

Enroll all your faculty members with discounted institutional membership to showcase your institution's academic strength to the world in the best way possible – join now and achieve results fast! 

Rankings
Ranking Based On Selection: 11
Radka Symonova
Metrics
H-Index
i10 Index
Citation Counts
19
25
1,156
Rankings
Ranking Based On Selection: 12
Tanja Shabarova
Metrics
H-Index
i10 Index
Citation Counts
16
16
879
cave microbiology
microbial ecology
groundwater microbiology
Rankings
Ranking Based On Selection: 13
Amin Golpour Dehsari
Metrics
H-Index
i10 Index
Citation Counts
15
23
684
Fish reproduction
Reproductive Physiology
Environmental DNA
Ecology
Sustainable Fisheries
Rankings
Ranking Based On Selection: 14
Hongjae Park
Metrics
H-Index
i10 Index
Citation Counts
12
13
392
Rankings
Ranking Based On Selection: 15
Million Tesfaye
Metrics
H-Index
i10 Index
Citation Counts
6
4
247
Aquatic Ecology
Fish Biology
Ornithology
Rankings
Ranking Based On Selection: 16
Paweł Markwitz
Metrics
H-Index
i10 Index
Citation Counts
5
4
173
Biology
Microbiology
Genetics
Biotechnology
Bacteriophages