Citation Rankings
Highly Cited Researchers
Highly Cited Researchers 104 Scientists Citation Rankings - 2025
Discover the world’s highly cited researchers through the AD Scientific Index 2025 Citation Rankings.
These rankings evaluate scientists based on their total and recent citation counts, capturing the breadth and real-time currency of academic recognition. Citation data reveals how widely a scholar’s work is referenced, applied, and extended across diverse disciplines. The rankings are routinely updated to reflect ongoing citation growth, while eliminating distortions from excessive co-authorship and institutional inflation. Premium tools provide access to detailed citation dynamics, unethical citation behavior detection, and field-normalized benchmarking.
* Total Citation Counts Rankings
Ranking Based On Selection: 1
conservation
ecology
climate change adaptation
citizen scienc
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
15,076
7,700
0.511
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* Total Citation Counts Rankings
Ranking Based On Selection: 2
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,992
6,202
0.621
* Total Citation Counts Rankings
Ranking Based On Selection: 3
wetland ecology
wetland elevation
sea level ris
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,941
2,637
0.295
* Total Citation Counts Rankings
Ranking Based On Selection: 4
Forest Ecology
Fire Ecolog
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,217
2,414
0.294
* Total Citation Counts Rankings
Ranking Based On Selection: 5
ecosystem ecology
biogeochemistry
permafros
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,822
4,481
0.573
* Total Citation Counts Rankings
Ranking Based On Selection: 6
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,493
2,187
0.292
* Total Citation Counts Rankings
Ranking Based On Selection: 7
analytical chemistry
atmospheric chemistr
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,826
1,834
0.315
* Total Citation Counts Rankings
Ranking Based On Selection: 8
ecolog
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,952
701
0.177
* Total Citation Counts Rankings
Ranking Based On Selection: 9
Vertebrate Paleontology
Aetosauria
Biostratigraphy
Stratigraphy
Histor
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,844
1,870
0.486
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* Total Citation Counts Rankings
Ranking Based On Selection: 10
glaciers
mass balance
glacier runoff
glacier inventor
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,677
2,132
0.580
* Total Citation Counts Rankings
Ranking Based On Selection: 11
Ecolog
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,607
1,475
0.409
* Total Citation Counts Rankings
Ranking Based On Selection: 12
Sea Turtle Biolog
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,445
1,509
0.438
* Total Citation Counts Rankings
Ranking Based On Selection: 13
Geomorphology
Surface Processes
Geochronology
Natural Hazard
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,359
1,384
0.412
* Total Citation Counts Rankings
Ranking Based On Selection: 14
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,167
920
0.290
* Total Citation Counts Rankings
Ranking Based On Selection: 15
Wildlife Biolog
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,030
1,912
0.631
* Total Citation Counts Rankings
Ranking Based On Selection: 16
plant physiological ecology
biogeochemistr
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,899
944
0.326
* Total Citation Counts Rankings
Ranking Based On Selection: 17
Applied Ecology
Adaptive Managemen
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,779
792
0.285
* Total Citation Counts Rankings
Ranking Based On Selection: 18
Conservation
Social Science
Evaluation
Leave No Trac
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,712
1,350
0.498
* Total Citation Counts Rankings
Ranking Based On Selection: 19
Freshwater Ecology
Conservation Planning
Invasion Biology
Climate Chang
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,454
1,334
0.544
* Total Citation Counts Rankings
Ranking Based On Selection: 20
Ecology
lichens
contaminants
Arcti
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,431
504
0.207
* Total Citation Counts Rankings
Ranking Based On Selection: 21
Geomorphology
Glacial and Quaternary Geolog
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,376
885
0.372
* Total Citation Counts Rankings
Ranking Based On Selection: 22
Population dynamics
entomology
climate chang
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,375
1,546
0.651
* Total Citation Counts Rankings
Ranking Based On Selection: 23
climate change
applied statistics
natural resource management
monitoring
model assessmen
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,182
646
0.296
* Total Citation Counts Rankings
Ranking Based On Selection: 24
Conservation Ecology
Road Ecology
Climate Change
Adaptive Managemen
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,159
648
0.300
* Total Citation Counts Rankings
Ranking Based On Selection: 25
Global change
long-term monitoring
plant communities
ecosystem ecology
nitrogen dynamic
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,139
916
0.428
* Total Citation Counts Rankings
Rankings
63,603
26,700
1
Ranking Based On Selection: 1
Abraham Miller-Rushing
National Park Service
Washington, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
15,076
7,700
0.511
conservation
ecology
climate change adaptation
citizen scienc
* Total Citation Counts Rankings
Rankings
105,131
41,440
2
Ranking Based On Selection: 2
James Comiskey
National Park Service
Washington, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,992
6,202
0.621
* Total Citation Counts Rankings
Rankings
119,264
46,220
3
Ranking Based On Selection: 3
James Lynch
National Park Service
Washington, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,941
2,637
0.295
wetland ecology
wetland elevation
sea level ris
* Total Citation Counts Rankings
Rankings
130,971
50,079
4
Ranking Based On Selection: 4
Jan Van Wagtendonk
National Park Service
Washington, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,217
2,414
0.294
* Total Citation Counts Rankings
Rankings
138,239
52,435
5
Ranking Based On Selection: 5
Jonathan O'Donnell
National Park Service
Washington, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,822
4,481
0.573
ecosystem ecology
biogeochemistry
permafros
* Total Citation Counts Rankings
Rankings
144,760
54,534
6
Ranking Based On Selection: 6
John Gross
National Park Service
Washington, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,493
2,187
0.292
* Total Citation Counts Rankings
Rankings
187,581
67,921
7
Ranking Based On Selection: 7
Barkley C Sive
National Park Service
Washington, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,826
1,834
0.315
analytical chemistry
atmospheric chemistr
* Total Citation Counts Rankings
Rankings
270,316
92,230
8
Ranking Based On Selection: 8
Tom Philippi
National Park Service
Washington, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,952
701
0.177
* Total Citation Counts Rankings
Rankings
276,869
94,122
9
Ranking Based On Selection: 9
William Parker
National Park Service
Washington, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,844
1,870
0.486
Vertebrate Paleontology
Aetosauria
Biostratigraphy
Stratigraphy
Histor
* Total Citation Counts Rankings
Rankings
287,741
97,171
10
Ranking Based On Selection: 10
Andrew Bliss
National Park Service
Washington, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,677
2,132
0.580
Smart Institutional Plan
Powerful Insights + Smart Membership = Institutional Success
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* Total Citation Counts Rankings
Rankings
292,413
98,539
11
Ranking Based On Selection: 11
John Paul Schmit
National Park Service
Washington, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,607
1,475
0.409
* Total Citation Counts Rankings
Rankings
304,208
101,936
12
Ranking Based On Selection: 12
Donna J Shaver
National Park Service
Washington, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,445
1,509
0.438
* Total Citation Counts Rankings
Rankings
310,748
103,761
13
Ranking Based On Selection: 13
Greg M Stock
National Park Service
Washington, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,359
1,384
0.412
Geomorphology
Surface Processes
Geochronology
Natural Hazard
* Total Citation Counts Rankings
Rankings
326,449
108,082
14
Ranking Based On Selection: 14
Grant Hilderbrand
National Park Service
Washington, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,167
920
0.290
* Total Citation Counts Rankings
Rankings
338,361
111,469
15
Ranking Based On Selection: 15
Kyle Joly
National Park Service
Washington, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,030
1,912
0.631
* Total Citation Counts Rankings
Rankings
350,799
114,917
16
Ranking Based On Selection: 16
Amy Miller
National Park Service
Washington, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,899
944
0.326
plant physiological ecology
biogeochemistr
* Total Citation Counts Rankings
Rankings
362,883
118,258
17
Ranking Based On Selection: 17
Mark E Miller
National Park Service
Washington, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,779
792
0.285
Applied Ecology
Adaptive Managemen
* Total Citation Counts Rankings
Rankings
369,908
120,199
18
Ranking Based On Selection: 18
Wade M Vagias
National Park Service
Washington, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,712
1,350
0.498
Conservation
Social Science
Evaluation
Leave No Trac
* Total Citation Counts Rankings
Rankings
399,488
128,249
19
Ranking Based On Selection: 19
David J Lawrence
National Park Service
Washington, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,454
1,334
0.544
Freshwater Ecology
Conservation Planning
Invasion Biology
Climate Chang
* Total Citation Counts Rankings
Rankings
402,423
129,036
20
Ranking Based On Selection: 20
Peter Neitlich
National Park Service
Washington, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,431
504
0.207
Ecology
lichens
contaminants
Arcti
* Total Citation Counts Rankings
Rankings
409,168
130,885
21
Ranking Based On Selection: 21
Michael G Loso
National Park Service
Washington, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,376
885
0.372
Geomorphology
Glacial and Quaternary Geolog
* Total Citation Counts Rankings
Rankings
409,241
130,900
22
Ranking Based On Selection: 22
Aaron Weed
National Park Service
Washington, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,375
1,546
0.651
Population dynamics
entomology
climate chang
* Total Citation Counts Rankings
Rankings
435,618
138,171
23
Ranking Based On Selection: 23
Joel Howard Reynolds
National Park Service
Washington, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,182
646
0.296
climate change
applied statistics
natural resource management
monitoring
model assessmen
* Total Citation Counts Rankings
Rankings
438,977
139,025
24
Ranking Based On Selection: 24
Amanda Hardy
National Park Service
Washington, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,159
648
0.300
Conservation Ecology
Road Ecology
Climate Change
Adaptive Managemen
* Total Citation Counts Rankings
Rankings
441,941
139,791
25
Ranking Based On Selection: 25
Isabel Ashton
National Park Service
Washington, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,139
916
0.428
Global change
long-term monitoring
plant communities
ecosystem ecology
nitrogen dynamic