Citation Rankings (Highly Cited Researchers) 2024 and list of influential and most cited researchers in Agriculture and Forestry, Art, Design and Architecture, Business and Management, Economics and Econometrics, Education, Engineering and Technology, History, Philosophy, Theology, Law, Medicine and Health Sciences, Natural Sciences and Social Sciences and their 256 sub-branches is a unique service offered only by “AD Scientific Index”. You can see the most cited and influential researchers in the country and region. See also for more specific citation analyses: "last 6 years citation index" Universities Rankings 2024 (Sort by: Total Citations) and Universities Rankings 2024 (Sort by : Last 6 Years Citations)
* Total Citation Counts Rankings
World Rank
1,494
Country Rank
665
Institution Rank : 2
![](https://cdn.adscientificindex.com/logos/1726.jpg)
![United States](/flags/us.png)
![David Anderson](https://cdn.adscientificindex.com/pictures/85/910179.jpg)
statistical ecology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
143,426
43,889
0.306
* Total Citation Counts Rankings
World Rank
5,821
Country Rank
2,768
Institution Rank : 7
![](https://cdn.adscientificindex.com/logos/1726.jpg)
![United States](/flags/us.png)
![N Leroy Poff](https://cdn.adscientificindex.com/pictures/46/910184.jpg)
riverine conservation
hydro-ecology & Eflows
traits-based ecology
freshwater climate adaptation
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
68,499
23,561
0.344
* Total Citation Counts Rankings
World Rank
7,891
Country Rank
3,769
Institution Rank : 11
![](https://cdn.adscientificindex.com/logos/1726.jpg)
![United States](/flags/us.png)
![William Cormack Black IV](/user/assets/images/profile/no-profile-photo.png)
Entomology
Statistics
Population Genetics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
56,710
22,716
0.401
* Total Citation Counts Rankings
World Rank
14,501
Country Rank
6,883
Institution Rank : 20
![](https://cdn.adscientificindex.com/logos/1726.jpg)
![United States](/flags/us.png)
![Michael G Ryan](https://cdn.adscientificindex.com/pictures/51/910195.jpg)
Ecosystems ecology
plant physiological ecology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
38,825
11,069
0.285
* Total Citation Counts Rankings
World Rank
14,921
Country Rank
7,081
Institution Rank : 21
![](https://cdn.adscientificindex.com/logos/1726.jpg)
![United States](/flags/us.png)
![Dennis Ojima](https://cdn.adscientificindex.com/pictures/f9/910194.jpg)
ecosystem
global change
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
38,153
8,854
0.232
* Total Citation Counts Rankings
World Rank
19,685
Country Rank
9,214
Institution Rank : 28
![](https://cdn.adscientificindex.com/logos/1726.jpg)
![United States](/flags/us.png)
![Melinda D Smith](https://cdn.adscientificindex.com/pictures/f8/910213.jpg)
Plant community ecology
grassland ecosystems
global change
climate extremes
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
31,939
18,205
0.570
* Total Citation Counts Rankings
World Rank
23,200
Country Rank
10,752
Institution Rank : 30
![](https://cdn.adscientificindex.com/logos/1726.jpg)
![United States](/flags/us.png)
![Matthew Wallenstein](https://cdn.adscientificindex.com/pictures/88/910223.jpg)
Ecology
Microbial Ecology
Soil
Biogeochemistry
Global Change
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
28,800
17,511
0.608
* Total Citation Counts Rankings
World Rank
23,876
Country Rank
11,042
Institution Rank : 31
![](https://cdn.adscientificindex.com/logos/1726.jpg)
![United States](/flags/us.png)
![Richard T Conant](/user/assets/images/profile/no-profile-photo.png)
ecosystem ecology
carbon cycling
nitrogen cycling
greenhouse gases
agriculture
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
28,256
15,261
0.540
* Total Citation Counts Rankings
World Rank
26,935
Country Rank
12,384
Institution Rank : 36
![](https://cdn.adscientificindex.com/logos/1726.jpg)
![United States](/flags/us.png)
![Elizabeth Pilon Smits](https://cdn.adscientificindex.com/pictures/ee/910220.jpg)
biology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
26,072
11,620
0.446
* Total Citation Counts Rankings
World Rank
29,331
Country Rank
13,411
Institution Rank : 40
![](https://cdn.adscientificindex.com/logos/1726.jpg)
![United States](/flags/us.png)
![William H Romme](/user/assets/images/profile/no-profile-photo.png)
fire ecology
forest ecology
landscape ecology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
24,621
5,819
0.236
* Total Citation Counts Rankings
World Rank
43,830
Country Rank
19,309
Institution Rank : 60
![](https://cdn.adscientificindex.com/logos/1726.jpg)
![United States](/flags/us.png)
![Cameron K Ghalambor](https://cdn.adscientificindex.com/pictures/c8/910242.jpg)
evolutionary ecology
evolutionary physiology
phenotypic plasticity
global change biology
zoology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
18,503
8,648
0.467
* Total Citation Counts Rankings
World Rank
44,610
Country Rank
19,624
Institution Rank : 62
![](https://cdn.adscientificindex.com/logos/1726.jpg)
![United States](/flags/us.png)
![Anireddy SN Reddy](https://cdn.adscientificindex.com/pictures/8f/910235.jpg)
pre-mRNA splicing
calcium signalling
plant biology
stress signaling
plant biotechnology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
18,270
6,227
0.341
* Total Citation Counts Rankings
World Rank
45,851
Country Rank
20,095
Institution Rank : 65
![](https://cdn.adscientificindex.com/logos/1726.jpg)
![United States](/flags/us.png)
![N Thompson Hobbs](/user/assets/images/profile/no-profile-photo.png)
ecology and ecological modeling
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
17,911
4,697
0.262
* Total Citation Counts Rankings
World Rank
46,925
Country Rank
20,520
Institution Rank : 66
![](https://cdn.adscientificindex.com/logos/1726.jpg)
![United States](/flags/us.png)
![Thomas J Stohlgren](https://cdn.adscientificindex.com/pictures/9a/910232.jpg)
Invasion Ecology
Modeling
Biodiversity
Conservation
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
17,600
4,826
0.274
* Total Citation Counts Rankings
World Rank
48,676
Country Rank
21,210
Institution Rank : 68
![](https://cdn.adscientificindex.com/logos/1726.jpg)
![United States](/flags/us.png)
![Stephen Ogle](https://cdn.adscientificindex.com/pictures/6b/910263.jpg)
Ecosystem Science
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
17,147
8,132
0.474
* Total Citation Counts Rankings
World Rank
48,866
Country Rank
21,286
Institution Rank : 69
![](https://cdn.adscientificindex.com/logos/1726.jpg)
![United States](/flags/us.png)
![Michael Shaffer](https://cdn.adscientificindex.com/pictures/f7/910493.jpg)
Bioinformatics
Computational Biology
Microbial Ecology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
17,097
16,953
0.992
* Total Citation Counts Rankings
World Rank
53,237
Country Rank
22,994
Institution Rank : 75
![](https://cdn.adscientificindex.com/logos/1726.jpg)
![United States](/flags/us.png)
![John C Moore](https://cdn.adscientificindex.com/pictures/dc/910251.jpg)
Ecosystem Ecology
Soil Ecology
Food webs
Environmental Education
Environmental Literacy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
16,034
5,308
0.331
* Total Citation Counts Rankings
World Rank
63,139
Country Rank
26,744
Institution Rank : 95
![](https://cdn.adscientificindex.com/logos/1726.jpg)
![United States](/flags/us.png)
![Terry Nett](/user/assets/images/profile/no-profile-photo.png)
biology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
14,079
1,521
0.108
* Total Citation Counts Rankings
World Rank
69,318
Country Rank
29,047
Institution Rank : 107
![](https://cdn.adscientificindex.com/logos/1726.jpg)
![United States](/flags/us.png)
![Gregory Ebel](https://cdn.adscientificindex.com/pictures/b2/910287.jpg)
Arboviruses
Mosquitoes
Ticks
Evolution
Population Genetics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
13,112
5,984
0.456
* Total Citation Counts Rankings
World Rank
81,666
Country Rank
33,524
Institution Rank : 123
![](https://cdn.adscientificindex.com/logos/1726.jpg)
![United States](/flags/us.png)
![Mark P Simmons](https://cdn.adscientificindex.com/pictures/f8/910290.jpg)
cladistics
plant systematics
systematic botany
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,478
3,582
0.312
* Total Citation Counts Rankings
World Rank
82,637
Country Rank
33,883
Institution Rank : 124
![](https://cdn.adscientificindex.com/logos/1726.jpg)
![United States](/flags/us.png)
![Merrill Kaufmann](https://cdn.adscientificindex.com/pictures/7a/910283.jpg)
fire ecology
landscape ecology
ecosystem management
physiology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,365
1,855
0.163
* Total Citation Counts Rankings
World Rank
87,123
Country Rank
35,465
Institution Rank : 131
![](https://cdn.adscientificindex.com/logos/1726.jpg)
![United States](/flags/us.png)
![William Kendall](https://cdn.adscientificindex.com/pictures/0f/910292.jpg)
Population Ecology
Statistical Ecology
Willdlife Management Science
CRU Program
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,878
3,088
0.284
* Total Citation Counts Rankings
World Rank
103,000
Country Rank
41,037
Institution Rank : 148
![](https://cdn.adscientificindex.com/logos/1726.jpg)
![United States](/flags/us.png)
![Maria E Fernandez Gimenez](https://cdn.adscientificindex.com/pictures/88/910357.jpg)
rangeland ecology & management
social-ecological systems
community-based natural resource management
traditional knowledge
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,406
4,897
0.521
* Total Citation Counts Rankings
World Rank
103,882
Country Rank
41,348
Institution Rank : 151
![](https://cdn.adscientificindex.com/logos/1726.jpg)
![United States](/flags/us.png)
![William Clements](https://cdn.adscientificindex.com/pictures/e1/910312.jpg)
Stream ecology and ecotoxicology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,335
2,647
0.284
* Total Citation Counts Rankings
World Rank
114,200
Country Rank
44,904
Institution Rank : 163
![](https://cdn.adscientificindex.com/logos/1726.jpg)
![United States](/flags/us.png)
![Michael F Antolin](/user/assets/images/profile/no-profile-photo.png)
Evolutionary biology
population genetics
infectious diseases
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,591
2,570
0.299
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
1,494
![United States](/flags/us.png)
665
![](https://cdn.adscientificindex.com/logos/1726.jpg)
2
David Anderson
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
143,426
43,889
0.306
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
5,821
![United States](/flags/us.png)
2,768
![](https://cdn.adscientificindex.com/logos/1726.jpg)
7
N Leroy Poff
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
68,499
23,561
0.344
![](https://cdn.adscientificindex.com/logos/1726.jpg)
riverine conservation
hydro-ecology & Eflows
traits-based ecology
freshwater climate adaptation
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
7,891
![United States](/flags/us.png)
3,769
![](https://cdn.adscientificindex.com/logos/1726.jpg)
11
William Cormack Black IV
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
56,710
22,716
0.401
![](https://cdn.adscientificindex.com/logos/1726.jpg)
Entomology
Statistics
Population Genetics
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
14,501
![United States](/flags/us.png)
6,883
![](https://cdn.adscientificindex.com/logos/1726.jpg)
20
Michael G Ryan
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
38,825
11,069
0.285
![](https://cdn.adscientificindex.com/logos/1726.jpg)
Ecosystems ecology
plant physiological ecology
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
14,921
![United States](/flags/us.png)
7,081
![](https://cdn.adscientificindex.com/logos/1726.jpg)
21
Dennis Ojima
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
38,153
8,854
0.232
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
19,685
![United States](/flags/us.png)
9,214
![](https://cdn.adscientificindex.com/logos/1726.jpg)
28
Melinda D Smith
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
31,939
18,205
0.570
![](https://cdn.adscientificindex.com/logos/1726.jpg)
Plant community ecology
grassland ecosystems
global change
climate extremes
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
23,200
![United States](/flags/us.png)
10,752
![](https://cdn.adscientificindex.com/logos/1726.jpg)
30
Matthew Wallenstein
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
28,800
17,511
0.608
![](https://cdn.adscientificindex.com/logos/1726.jpg)
Ecology
Microbial Ecology
Soil
Biogeochemistry
Global Change
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
23,876
![United States](/flags/us.png)
11,042
![](https://cdn.adscientificindex.com/logos/1726.jpg)
31
Richard T Conant
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
28,256
15,261
0.540
![](https://cdn.adscientificindex.com/logos/1726.jpg)
ecosystem ecology
carbon cycling
nitrogen cycling
greenhouse gases
agriculture
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
26,935
![United States](/flags/us.png)
12,384
![](https://cdn.adscientificindex.com/logos/1726.jpg)
36
Elizabeth Pilon Smits
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
26,072
11,620
0.446
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
29,331
![United States](/flags/us.png)
13,411
![](https://cdn.adscientificindex.com/logos/1726.jpg)
40
William H Romme
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
24,621
5,819
0.236
![](https://cdn.adscientificindex.com/logos/1726.jpg)
fire ecology
forest ecology
landscape ecology
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* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
43,830
![United States](/flags/us.png)
19,309
![](https://cdn.adscientificindex.com/logos/1726.jpg)
60
Cameron K Ghalambor
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
18,503
8,648
0.467
![](https://cdn.adscientificindex.com/logos/1726.jpg)
evolutionary ecology
evolutionary physiology
phenotypic plasticity
global change biology
zoology
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
44,610
![United States](/flags/us.png)
19,624
![](https://cdn.adscientificindex.com/logos/1726.jpg)
62
Anireddy SN Reddy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
18,270
6,227
0.341
![](https://cdn.adscientificindex.com/logos/1726.jpg)
pre-mRNA splicing
calcium signalling
plant biology
stress signaling
plant biotechnology
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
45,851
![United States](/flags/us.png)
20,095
![](https://cdn.adscientificindex.com/logos/1726.jpg)
65
N Thompson Hobbs
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
17,911
4,697
0.262
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
46,925
![United States](/flags/us.png)
20,520
![](https://cdn.adscientificindex.com/logos/1726.jpg)
66
Thomas J Stohlgren
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
17,600
4,826
0.274
![](https://cdn.adscientificindex.com/logos/1726.jpg)
Invasion Ecology
Modeling
Biodiversity
Conservation
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
48,676
![United States](/flags/us.png)
21,210
![](https://cdn.adscientificindex.com/logos/1726.jpg)
68
Stephen Ogle
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
17,147
8,132
0.474
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
48,866
![United States](/flags/us.png)
21,286
![](https://cdn.adscientificindex.com/logos/1726.jpg)
69
Michael Shaffer
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
17,097
16,953
0.992
![](https://cdn.adscientificindex.com/logos/1726.jpg)
Bioinformatics
Computational Biology
Microbial Ecology
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
53,237
![United States](/flags/us.png)
22,994
![](https://cdn.adscientificindex.com/logos/1726.jpg)
75
John C Moore
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
16,034
5,308
0.331
![](https://cdn.adscientificindex.com/logos/1726.jpg)
Ecosystem Ecology
Soil Ecology
Food webs
Environmental Education
Environmental Literacy
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
63,139
![United States](/flags/us.png)
26,744
![](https://cdn.adscientificindex.com/logos/1726.jpg)
95
Terry Nett
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
14,079
1,521
0.108
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
69,318
![United States](/flags/us.png)
29,047
![](https://cdn.adscientificindex.com/logos/1726.jpg)
107
Gregory Ebel
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
13,112
5,984
0.456
![](https://cdn.adscientificindex.com/logos/1726.jpg)
Arboviruses
Mosquitoes
Ticks
Evolution
Population Genetics
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
81,666
![United States](/flags/us.png)
33,524
![](https://cdn.adscientificindex.com/logos/1726.jpg)
123
Mark P Simmons
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,478
3,582
0.312
![](https://cdn.adscientificindex.com/logos/1726.jpg)
cladistics
plant systematics
systematic botany
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
82,637
![United States](/flags/us.png)
33,883
![](https://cdn.adscientificindex.com/logos/1726.jpg)
124
Merrill Kaufmann
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,365
1,855
0.163
![](https://cdn.adscientificindex.com/logos/1726.jpg)
fire ecology
landscape ecology
ecosystem management
physiology
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
87,123
![United States](/flags/us.png)
35,465
![](https://cdn.adscientificindex.com/logos/1726.jpg)
131
William Kendall
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,878
3,088
0.284
![](https://cdn.adscientificindex.com/logos/1726.jpg)
Population Ecology
Statistical Ecology
Willdlife Management Science
CRU Program
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
103,000
![United States](/flags/us.png)
41,037
![](https://cdn.adscientificindex.com/logos/1726.jpg)
148
Maria E Fernandez Gimenez
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,406
4,897
0.521
![](https://cdn.adscientificindex.com/logos/1726.jpg)
rangeland ecology & management
social-ecological systems
community-based natural resource management
traditional knowledge
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
103,882
![United States](/flags/us.png)
41,348
![](https://cdn.adscientificindex.com/logos/1726.jpg)
151
William Clements
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,335
2,647
0.284
![](https://cdn.adscientificindex.com/logos/1726.jpg)
Stream ecology and ecotoxicology
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
114,200
![United States](/flags/us.png)
44,904
![](https://cdn.adscientificindex.com/logos/1726.jpg)
163
Michael F Antolin
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,591
2,570
0.299
![](https://cdn.adscientificindex.com/logos/1726.jpg)
Evolutionary biology
population genetics
infectious diseases