Citation Rankings
Highly Cited Researchers
Highly Cited Researchers 558 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: 26
Conservation Biology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
17,930
6,023
0.336
* Total Citation Counts Rankings
Ranking Based On Selection: 27
carbon cycle
climate change
fossil fuel CO2
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
17,883
7,023
0.393
* Total Citation Counts Rankings
Ranking Based On Selection: 28
Software Engineering
Microbiome Bioinformatics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
17,774
17,411
0.980
* Total Citation Counts Rankings
Ranking Based On Selection: 29
strategic management
corporate governance
boards of directors
research methods
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
15,957
4,609
0.289
* Total Citation Counts Rankings
Ranking Based On Selection: 30
Exercise
Oncology
Physical activity
Nursing
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
15,476
7,054
0.456
* Total Citation Counts Rankings
Ranking Based On Selection: 31
Ecology
global change biology
physiological ecology
biophysics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
15,142
5,928
0.391
* Total Citation Counts Rankings
Ranking Based On Selection: 32
astronomy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
14,855
6,412
0.432
* Total Citation Counts Rankings
Ranking Based On Selection: 33
Tourism Studies
Urban Planning
Regional Geography of E & SE Asia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
14,779
6,930
0.469
* Total Citation Counts Rankings
Ranking Based On Selection: 34
forest ecology
ecological restoration
conservation ecology
natural resource policy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
14,215
1,745
0.123
* Total Citation Counts Rankings
Ranking Based On Selection: 35
applied linguistics
TESL
reading
content-based instruction
disciplinary writing
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
14,152
4,843
0.342
* Total Citation Counts Rankings
Ranking Based On Selection: 36
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
13,295
4,973
0.374
* Total Citation Counts Rankings
Ranking Based On Selection: 37
Plague
Tularemia
Melioidosis
Disease Ecology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
12,568
4,440
0.353
* Total Citation Counts Rankings
Ranking Based On Selection: 38
Muscle physiology
Scaling
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
12,365
3,076
0.249
* Total Citation Counts Rankings
Ranking Based On Selection: 39
Applied linguistics
Corpus linguistics
First and second language writing
Corpus linguistics and teacher training
Materials d
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
12,156
3,667
0.302
* Total Citation Counts Rankings
Ranking Based On Selection: 40
Genetics
Placebos
Pedagogy
Nutrition
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,396
878
0.077
* Total Citation Counts Rankings
Ranking Based On Selection: 41
ecological synthesis & modeling
desert ecology
Bayesian statistics
plant physiological & ecosystem ecology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,270
5,878
0.522
* Total Citation Counts Rankings
Ranking Based On Selection: 42
soil C and N cycling
stable isotopes
metabolic processes
extreme environments
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,076
5,000
0.451
* Total Citation Counts Rankings
Ranking Based On Selection: 43
traditional healing
cross-cultural healthcare
alcoholism and alcohol abuse
social networks
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,687
3,033
0.284
* Total Citation Counts Rankings
Ranking Based On Selection: 44
pragmatics
classroom-based research
second language acquisition
English-medium education
technology-assisted learning
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,347
6,225
0.602
* Total Citation Counts Rankings
Ranking Based On Selection: 45
Terrestrial carbon cycling
land-atmosphere carbon exchange
carbon cycle modeling
carbon sequestration
greenhouse gas account
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,214
6,235
0.610
* Total Citation Counts Rankings
Ranking Based On Selection: 46
Ecosystem Ecology
Ecoinformatics
Tropical Forests
Megafauna
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,195
5,953
0.584
* Total Citation Counts Rankings
Ranking Based On Selection: 47
Software Engineering
CSCW
Software Evolution
Open Source
Computer Science
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,673
5,493
0.568
* Total Citation Counts Rankings
Ranking Based On Selection: 48
Infectious Disease
Pathogen Genomics
Conservation Biology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,355
4,928
0.527
* Total Citation Counts Rankings
Ranking Based On Selection: 49
Astrobiology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,327
1,082
0.116
* Total Citation Counts Rankings
Ranking Based On Selection: 50
Forest and Range Plant Community Ecology
Restoration Ecology
Land-Use Change
Legacy Effects
Plant Population Ecology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,048
1,645
0.182
* Total Citation Counts Rankings
Rankings
48,186
20,910
26
Ranking Based On Selection: 26
Paul Beier
Northern Arizona University
Flagstaff, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
17,930
6,023
0.336
* Total Citation Counts Rankings
Rankings
48,336
20,965
27
Ranking Based On Selection: 27
Kevin Gurney
Northern Arizona University
Flagstaff, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
17,883
7,023
0.393
carbon cycle
climate change
fossil fuel CO2
* Total Citation Counts Rankings
Rankings
48,724
21,119
28
Ranking Based On Selection: 28
Christopher R Keefe
Northern Arizona University
Flagstaff, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
17,774
17,411
0.980
Software Engineering
Microbiome Bioinformatics
* Total Citation Counts Rankings
Rankings
56,301
24,035
29
Ranking Based On Selection: 29
Brian K Boyd
Northern Arizona University
Flagstaff, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
15,957
4,609
0.289
strategic management
corporate governance
boards of directors
research methods
* Total Citation Counts Rankings
Rankings
58,654
24,950
30
Ranking Based On Selection: 30
Anna L Schwartz
Northern Arizona University
Flagstaff, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
15,476
7,054
0.456
Exercise
Oncology
Physical activity
Nursing
* Total Citation Counts Rankings
Rankings
60,376
25,614
31
Ranking Based On Selection: 31
George Koch
Northern Arizona University
Flagstaff, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
15,142
5,928
0.391
Ecology
global change biology
physiological ecology
biophysics
* Total Citation Counts Rankings
Rankings
61,894
26,181
32
Ranking Based On Selection: 32
David Trilling
Northern Arizona University
Flagstaff, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
14,855
6,412
0.432
* Total Citation Counts Rankings
Rankings
62,305
26,327
33
Ranking Based On Selection: 33
Alan A Lew
Northern Arizona University
Flagstaff, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
14,779
6,930
0.469
Tourism Studies
Urban Planning
Regional Geography of E & SE Asia
* Total Citation Counts Rankings
Rankings
65,597
27,560
34
Ranking Based On Selection: 34
William Wallace Covington|William W Covington, W. W. Covington, Wally Covington
Northern Arizona University
Flagstaff, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
14,215
1,745
0.123
forest ecology
ecological restoration
conservation ecology
natural resource policy
* Total Citation Counts Rankings
Rankings
65,997
27,709
35
Ranking Based On Selection: 35
Fredricka L Stoller
Northern Arizona University
Flagstaff, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
14,152
4,843
0.342
applied linguistics
TESL
reading
content-based instruction
disciplinary writing
* Total Citation Counts Rankings
Rankings
71,470
29,711
36
Ranking Based On Selection: 36
Catherine Gehring
Northern Arizona University
Flagstaff, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
13,295
4,973
0.374
* Total Citation Counts Rankings
Rankings
76,620
31,546
37
Ranking Based On Selection: 37
David M Wagner
Northern Arizona University
Flagstaff, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
12,568
4,440
0.353
Plague
Tularemia
Melioidosis
Disease Ecology
* Total Citation Counts Rankings
Rankings
78,140
32,069
38
Ranking Based On Selection: 38
Stan L Lindstedt
Northern Arizona University
Flagstaff, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
12,365
3,076
0.249
* Total Citation Counts Rankings
Rankings
79,818
32,706
39
Ranking Based On Selection: 39
Randi Reppen
Northern Arizona University
Flagstaff, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
12,156
3,667
0.302
Applied linguistics
Corpus linguistics
First and second language writing
Corpus linguistics and teacher training
Materials d
* Total Citation Counts Rankings
Rankings
86,285
35,041
40
Ranking Based On Selection: 40
Alison E Adams
Northern Arizona University
Flagstaff, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,396
878
0.077
Genetics
Placebos
Pedagogy
Nutrition
* Total Citation Counts Rankings
Rankings
87,447
35,455
41
Ranking Based On Selection: 41
Kiona Ogle
Northern Arizona University
Flagstaff, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,270
5,878
0.522
ecological synthesis & modeling
desert ecology
Bayesian statistics
plant physiological & ecosystem ecology
* Total Citation Counts Rankings
Rankings
89,316
36,084
42
Ranking Based On Selection: 42
Paul Dijkstra
Northern Arizona University
Flagstaff, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,076
5,000
0.451
soil C and N cycling
stable isotopes
metabolic processes
extreme environments
* Total Citation Counts Rankings
Rankings
93,163
37,427
43
Ranking Based On Selection: 43
Robert T Trotter II
Northern Arizona University
Flagstaff, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,687
3,033
0.284
traditional healing
cross-cultural healthcare
alcoholism and alcohol abuse
social networks
* Total Citation Counts Rankings
Rankings
96,678
38,638
44
Ranking Based On Selection: 44
Naoko Taguchi
Northern Arizona University
Flagstaff, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,347
6,225
0.602
pragmatics
classroom-based research
second language acquisition
English-medium education
technology-assisted learning
* Total Citation Counts Rankings
Rankings
98,115
39,111
45
Ranking Based On Selection: 45
Deborah Huntzinger
Northern Arizona University
Flagstaff, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,214
6,235
0.610
Terrestrial carbon cycling
land-atmosphere carbon exchange
carbon cycle modeling
carbon sequestration
greenhouse gas account
* Total Citation Counts Rankings
Rankings
98,331
39,192
46
Ranking Based On Selection: 46
Christopher E Doughty
Northern Arizona University
Flagstaff, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,195
5,953
0.584
Ecosystem Ecology
Ecoinformatics
Tropical Forests
Megafauna
* Total Citation Counts Rankings
Rankings
104,390
41,315
47
Ranking Based On Selection: 47
Marco Aurelio Gerosa
Northern Arizona University
Flagstaff, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,673
5,493
0.568
Software Engineering
CSCW
Software Evolution
Open Source
Computer Science
* Total Citation Counts Rankings
Rankings
108,513
42,736
48
Ranking Based On Selection: 48
Jeffrey T Foster
Northern Arizona University
Flagstaff, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,355
4,928
0.527
Infectious Disease
Pathogen Genomics
Conservation Biology
* Total Citation Counts Rankings
Rankings
108,875
42,865
49
Ranking Based On Selection: 49
David Koerner
Northern Arizona University
Flagstaff, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,327
1,082
0.116
* Total Citation Counts Rankings
Rankings
112,684
44,225
50
Ranking Based On Selection: 50
Margaret M Moore
Northern Arizona University
Flagstaff, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,048
1,645
0.182
Forest and Range Plant Community Ecology
Restoration Ecology
Land-Use Change
Legacy Effects
Plant Population Ecology