Citation Rankings
Highly Cited Researchers
Highly Cited Researchers 315 Scientists Citation Rankings - 2025
The Citation Rankings (Highly Cited Researchers) list highlight the most cited and influential researchers across a vast range of scientific fields, covering 197 main and sub-disciplines, including the Art and Humanities Citation Rankings and Social Sciences and Humanities Citation Rankings. This service, offered exclusively by AD Scientific Index, aims to provide a balanced perspective by excluding data from CERN and other statistical sources that disproportionately favor certain researchers, particularly in the social sciences and humanities. This unique approach addresses the advantages researchers with multi-author publications and CERN involvement hold over others. Furthermore, citation rankings help uncover rule violations and unethical practices within the research community. For more detailed citation analyses, explore the Scientists Last 6 Years Citation Index, Universities Total Citations Rankings 2025, and Universities Last 6 Years Citations Rankings 2025.
* Total Citation Counts Rankings
Ranking Based On Selection: 1
Plant diversity and evolution
palaeovegetation science
conservation science
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
46,133
10,380
0.225
* Total Citation Counts Rankings
Ranking Based On Selection: 2
Conservation biology
megaherbivore ecology
predator prey interactions
ecological history
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
16,700
6,493
0.389
* Total Citation Counts Rankings
Ranking Based On Selection: 3
Mantle Geochemistry
Cosmochemistry
Geology of southern Africa and western North America
Natural philosophy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,736
1,996
0.228
* Total Citation Counts Rankings
Ranking Based On Selection: 4
nonwoven
textiles
fibre reinforced compoistes
technical textiles
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,691
3,391
0.441
* Total Citation Counts Rankings
Ranking Based On Selection: 5
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,761
2,096
0.440
* Total Citation Counts Rankings
Ranking Based On Selection: 6
Literary & Cultural Studies
feminisms
postcolonial theory
slave memory
Female Fear Factory
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,450
1,972
0.443
* Total Citation Counts Rankings
Ranking Based On Selection: 7
marine top predators - behavioural ecology - population ecology - conservation biology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,166
2,393
0.574
* Total Citation Counts Rankings
Ranking Based On Selection: 8
Semiconductor Physics
Photovoltaics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,050
1,090
0.357
* Total Citation Counts Rankings
Ranking Based On Selection: 9
Ecotoxicology
Cyanotoxinology and Cyanotoxicology
Fresh water quality
Phytoremediation
Bio-fertilizers
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,724
820
0.301
* Total Citation Counts Rankings
Ranking Based On Selection: 10
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,679
686
0.256
* Total Citation Counts Rankings
Ranking Based On Selection: 11
Manufacturing
Hydrogen
Renewable Energy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,516
1,060
0.421
* Total Citation Counts Rankings
Ranking Based On Selection: 12
Fatigue and solid state welding
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,456
943
0.384
* Total Citation Counts Rankings
Ranking Based On Selection: 13
Vegetation ecology
Fire ecology
Invasive plant biology
Conservation management
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,271
1,281
0.564
* Total Citation Counts Rankings
Ranking Based On Selection: 14
Machine Learning and Computational Intelligence
Image Processing
Telecommunications
Signal Processing
Engineering Education
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,178
674
0.309
* Total Citation Counts Rankings
Ranking Based On Selection: 15
compound semiconductors
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,160
663
0.307
* Total Citation Counts Rankings
Ranking Based On Selection: 16
Family Businesses
SMEs
Entrepreneurship
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,062
738
0.358
* Total Citation Counts Rankings
Ranking Based On Selection: 17
IT
CS
IS
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,021
1,129
0.559
* Total Citation Counts Rankings
Ranking Based On Selection: 18
Greater Cape Evoscapes: phylogeography
molecular ecology
distribution modelling
subtropical thicket ecology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,932
1,246
0.645
* Total Citation Counts Rankings
Ranking Based On Selection: 19
Experience Marketing
Service Quality
Consumer Behavior
Tourism. Marketing
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,918
794
0.414
* Total Citation Counts Rankings
Ranking Based On Selection: 20
Forest Silviculture
Vegetation Management
Coppice Management
Plantation Regeneration
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,798
576
0.320
* Total Citation Counts Rankings
Ranking Based On Selection: 21
higher education internationalization
decolonization of knowledge
peace building
social justice
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,785
1,378
0.772
* Total Citation Counts Rankings
Ranking Based On Selection: 22
Inorganic chemistry
materials
catalysis
hydrometallurgy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,663
781
0.470
* Total Citation Counts Rankings
Ranking Based On Selection: 23
Construction Management
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,617
978
0.605
* Total Citation Counts Rankings
Ranking Based On Selection: 24
family business
entrepreneurship
small business
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,594
691
0.434
* Total Citation Counts Rankings
Ranking Based On Selection: 25
Analytical Chemistry/Environmental modelling
Ecotoxicology
Persistent organic pollutants
phytoremediation
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,563
1,553
0.994
* Total Citation Counts Rankings
Rankings
11,636
36
1
Ranking Based On Selection: 1
Richard M. Cowling
Nelson Mandela University
Port Elizabeth, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
46,133
10,380
0.225
Plant diversity and evolution
palaeovegetation science
conservation science
* Total Citation Counts Rankings
Rankings
52,969
174
2
Ranking Based On Selection: 2
Graham Ih Kerley
Nelson Mandela University
Port Elizabeth, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
16,700
6,493
0.389
Conservation biology
megaherbivore ecology
predator prey interactions
ecological history
* Total Citation Counts Rankings
Rankings
117,255
440
3
Ranking Based On Selection: 3
David Bell
Nelson Mandela University
Port Elizabeth, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,736
1,996
0.228
Mantle Geochemistry
Cosmochemistry
Geology of southern Africa and western North America
Natural philosophy
* Total Citation Counts Rankings
Rankings
134,964
533
4
Ranking Based On Selection: 4
Rajesh Anandjiwala
Nelson Mandela University
Port Elizabeth, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,691
3,391
0.441
nonwoven
textiles
fibre reinforced compoistes
technical textiles
* Total Citation Counts Rankings
Rankings
218,911
914
5
Ranking Based On Selection: 5
Maryna Van De Venter
Nelson Mandela University
Port Elizabeth, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,761
2,096
0.440
* Total Citation Counts Rankings
Rankings
233,140
977
6
Ranking Based On Selection: 6
Pumla Dineo Gqola
Nelson Mandela University
Port Elizabeth, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,450
1,972
0.443
Literary & Cultural Studies
feminisms
postcolonial theory
slave memory
Female Fear Factory
* Total Citation Counts Rankings
Rankings
247,773
1,051
7
Ranking Based On Selection: 7
Pierre Pistorius
Nelson Mandela University
Port Elizabeth, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,166
2,393
0.574
marine top predators - behavioural ecology - population ecology - conservation biology
* Total Citation Counts Rankings
Rankings
324,175
1,453
8
Ranking Based On Selection: 8
EE Van Dyk
Nelson Mandela University
Port Elizabeth, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,050
1,090
0.357
* Total Citation Counts Rankings
Rankings
355,299
1,612
9
Ranking Based On Selection: 9
Tim Downing
Nelson Mandela University
Port Elizabeth, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,724
820
0.301
Ecotoxicology
Cyanotoxinology and Cyanotoxicology
Fresh water quality
Phytoremediation
Bio-fertilizers
* Total Citation Counts Rankings
Rankings
360,050
1,642
10
Ranking Based On Selection: 10
Joanne R Naidoo
Nelson Mandela University
Port Elizabeth, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,679
686
0.256
* Total Citation Counts Rankings
Rankings
378,030
1,745
11
Ranking Based On Selection: 11
K. Abou-El-Hossein
Nelson Mandela University
Port Elizabeth, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,516
1,060
0.421
Manufacturing
Hydrogen
Renewable Energy
* Total Citation Counts Rankings
Rankings
385,167
1,781
12
Ranking Based On Selection: 12
DG Hattingh
Nelson Mandela University
Port Elizabeth, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,456
943
0.384
* Total Citation Counts Rankings
Rankings
408,281
1,913
13
Ranking Based On Selection: 13
Tineke Kraaij
Nelson Mandela University
Port Elizabeth, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,271
1,281
0.564
Vegetation ecology
Fire ecology
Invasive plant biology
Conservation management
* Total Citation Counts Rankings
Rankings
421,189
1,986
14
Ranking Based On Selection: 14
Barend Van Wyk
Nelson Mandela University
Port Elizabeth, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,178
674
0.309
Machine Learning and Computational Intelligence
Image Processing
Telecommunications
Signal Processing
Engineering Education
* Total Citation Counts Rankings
Rankings
423,787
2,008
15
Ranking Based On Selection: 15
Johannes Reinhardt Botha
Nelson Mandela University
Port Elizabeth, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,160
663
0.307
* Total Citation Counts Rankings
Rankings
438,297
2,087
16
Ranking Based On Selection: 16
Elmarie Venter
Nelson Mandela University
Port Elizabeth, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,062
738
0.358
Family Businesses
SMEs
Entrepreneurship
* Total Citation Counts Rankings
Rankings
444,566
2,115
17
Ranking Based On Selection: 17
Andre Calitz
Nelson Mandela University
Port Elizabeth, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,021
1,129
0.559
* Total Citation Counts Rankings
Rankings
458,988
2,180
18
Ranking Based On Selection: 18
Alastair Potts
Nelson Mandela University
Port Elizabeth, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,932
1,246
0.645
Greater Cape Evoscapes: phylogeography
molecular ecology
distribution modelling
subtropical thicket ecology
* Total Citation Counts Rankings
Rankings
461,416
2,194
19
Ranking Based On Selection: 19
Laetitia Radder
Nelson Mandela University
Port Elizabeth, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,918
794
0.414
Experience Marketing
Service Quality
Consumer Behavior
Tourism. Marketing
* Total Citation Counts Rankings
Rankings
482,355
2,299
20
Ranking Based On Selection: 20
Little KM
Nelson Mandela University
Port Elizabeth, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,798
576
0.320
Forest Silviculture
Vegetation Management
Coppice Management
Plantation Regeneration
* Total Citation Counts Rankings
Rankings
484,672
2,311
21
Ranking Based On Selection: 21
Savo Heleta
Nelson Mandela University
Port Elizabeth, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,785
1,378
0.772
higher education internationalization
decolonization of knowledge
peace building
social justice
* Total Citation Counts Rankings
Rankings
508,489
2,462
22
Ranking Based On Selection: 22
Zenixole Tshentu
Nelson Mandela University
Port Elizabeth, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,663
781
0.470
Inorganic chemistry
materials
catalysis
hydrometallurgy
* Total Citation Counts Rankings
Rankings
518,105
2,523
23
Ranking Based On Selection: 23
Winston Shakantu
Nelson Mandela University
Port Elizabeth, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,617
978
0.605
* Total Citation Counts Rankings
Rankings
522,828
2,547
24
Ranking Based On Selection: 24
Shelley M Farrington
Nelson Mandela University
Port Elizabeth, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,594
691
0.434
family business
entrepreneurship
small business
* Total Citation Counts Rankings
Rankings
529,323
2,582
25
Ranking Based On Selection: 25
Chijioke Olisah
Nelson Mandela University
Port Elizabeth, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,563
1,553
0.994
Analytical Chemistry/Environmental modelling
Ecotoxicology
Persistent organic pollutants
phytoremediation