Citation Rankings
Highly Cited Researchers
International Union for Conservation of Nature Highly Cited Researchers Citation Rankings 2025
Citation Rankings (Highly Cited Researchers) and the list of the most cited and influential researchers cover a wide range of scientific fields, spanning 197 main and sub-disciplines, as well as the Art and Humanities Citation Rankings and Social Sciences and Humanities Citation Rankings, offering a unique service. Additionally, the list without CERN, Statistical Data, etc., provided exclusively by “AD Scientific Index”, is part of our effort to balance the situation created by CERN and researchers with statistical data, who have an advantage over others, especially those in the social and humanities fields. There should be new regulations for multi-author and CERN papers. Citation lists also reveal many rule violations and unethical practices. See also for more specific citation analyses: 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
Conservation Biology
Biodiversity
Extinction
Ecology
Ornithology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
58,673
26,232
0.447
* Total Citation Counts Rankings
Ranking Based On Selection :2
ecology
protected areas
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,034
4,563
0.649
* Total Citation Counts Rankings
Ranking Based On Selection :3
environmental and resource economics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,273
4,797
0.765
* Total Citation Counts Rankings
Ranking Based On Selection :4
Conservation Biology
Key Biodiversity Areas
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,754
2,310
0.486
* Total Citation Counts Rankings
Ranking Based On Selection :5
Conservation Biology
Invasion biology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,443
2,287
0.515
* Total Citation Counts Rankings
Ranking Based On Selection :6
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,270
1,251
0.551
* Total Citation Counts Rankings
Ranking Based On Selection :7
Freshwater Biology
Biological Invasions
Evolutionary Ecology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,502
1,048
0.698
* Total Citation Counts Rankings
Ranking Based On Selection :8
Conservation
Wildlife Trade
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,376
1,273
0.925
* Total Citation Counts Rankings
Ranking Based On Selection :9
Environment
Ecosystem based Risk Reduction
Climate Change and Participatory Approaches in Development
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
620
313
0.505
* Total Citation Counts Rankings
Ranking Based On Selection :10
Environmental and Resource Economics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
577
463
0.802
* Total Citation Counts Rankings
Ranking Based On Selection :11
Microbial Ecology
Biostatistics
Spatial Ecology
Amphibians
Conservation
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
573
427
0.745
* Total Citation Counts Rankings
Ranking Based On Selection :12
Agroforestry
Soil science
General Agronomy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
547
520
0.951
* Total Citation Counts Rankings
Ranking Based On Selection :13
Ecology
Protected Areas
Conservation
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
479
383
0.800
* Total Citation Counts Rankings
Ranking Based On Selection :14
environment
sustainability
coral reefs
tropical fisheries
climate change
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
317
110
0.347
* Total Citation Counts Rankings
Ranking Based On Selection :15
Ocean
biodiversity
seamounts
plankton
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
280
185
0.661
* Total Citation Counts Rankings
Ranking Based On Selection :16
forest and land policy
sustainability
climate science
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
279
214
0.767
* Total Citation Counts Rankings
Ranking Based On Selection :17
Environmental Management
Forest Landscape Restoration
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
153
101
0.660
* Total Citation Counts Rankings
Ranking Based On Selection :18
Environment
water
wetlands
coastal ecosystems
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
122
73
0.598
* Total Citation Counts Rankings
Ranking Based On Selection :19
Biodiversity
diversity
conservation
regeneration
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
75
51
0.680
* Total Citation Counts Rankings
Ranking Based On Selection :20
sharks
marine plastic pollution
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
43
43
1.000
* Total Citation Counts Rankings
Ranking Based On Selection :21
impact assessment
ecosystem restoration
nature-based solutions
ecology economy
water management
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
16
16
1.000
* Total Citation Counts Rankings
Ranking Based On Selection :22
Raptor Research
Zoonotic Disease
GIS
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8
7
0.875
* Total Citation Counts Rankings
Ranking Based On Selection :23
biodiversity
conservation
epigenetics
evolutionary theory
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7
7
1.000
* Total Citation Counts Rankings
Rankings
7,435
118
1
Ranking Based On Selection: 1
Thomas Brooks
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
58,673
26,232
0.447
Conservation Biology
Biodiversity
Extinction
Ecology
Ornithology
* Total Citation Counts Rankings
Rankings
141,650
2,262
2
Ranking Based On Selection: 2
Stephen Woodley
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,034
4,563
0.649
* Total Citation Counts Rankings
Rankings
159,569
2,477
3
Ranking Based On Selection: 3
Juha Siikamäki
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,273
4,797
0.765
environmental and resource economics
* Total Citation Counts Rankings
Rankings
209,463
3,104
4
Ranking Based On Selection: 4
Annabelle Cuttelod
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,754
2,310
0.486
Conservation Biology
Key Biodiversity Areas
* Total Citation Counts Rankings
Rankings
223,112
3,254
5
Ranking Based On Selection: 5
Kevin Smith
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,443
2,287
0.515
Conservation Biology
Invasion biology
* Total Citation Counts Rankings
Rankings
392,353
5,156
6
Ranking Based On Selection: 6
Catherine Numa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,270
1,251
0.551
* Total Citation Counts Rankings
Rankings
523,957
6,529
7
Ranking Based On Selection: 7
Ana Luisa Nunes
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,502
1,048
0.698
Freshwater Biology
Biological Invasions
Evolutionary Ecology
* Total Citation Counts Rankings
Rankings
553,447
6,836
8
Ranking Based On Selection: 8
Oliver Tallowin
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,376
1,273
0.925
* Total Citation Counts Rankings
Rankings
833,442
9,331
9
Ranking Based On Selection: 9
Ananda Mallawatantri
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
620
313
0.505
Environment
Ecosystem based Risk Reduction
Climate Change and Participatory Approaches in Development
* Total Citation Counts Rankings
Rankings
856,328
9,504
10
Ranking Based On Selection: 10
Matias Piaggio
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
577
463
0.802
Environmental and Resource Economics
* Total Citation Counts Rankings
Rankings
858,574
9,518
11
Ranking Based On Selection: 11
Randall R. Jiménez
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
573
427
0.745
Microbial Ecology
Biostatistics
Spatial Ecology
Amphibians
Conservation
* Total Citation Counts Rankings
Rankings
873,048
9,651
12
Ranking Based On Selection: 12
Alain Ndoli
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
547
520
0.951
Agroforestry
Soil science
General Agronomy
* Total Citation Counts Rankings
Rankings
918,698
10,124
13
Ranking Based On Selection: 13
Bruno Leles
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
479
383
0.800
Ecology
Protected Areas
Conservation
* Total Citation Counts Rankings
Rankings
1,082,949
12,166
14
Ranking Based On Selection: 14
Ken Kassem
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
317
110
0.347
environment
sustainability
coral reefs
tropical fisheries
climate change
* Total Citation Counts Rankings
Rankings
1,132,685
12,783
15
Ranking Based On Selection: 15
Aurélie Spadone
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
280
185
0.661
Ocean
biodiversity
seamounts
plankton
* Total Citation Counts Rankings
Rankings
1,133,976
12,800
16
Ranking Based On Selection: 16
Satrio A Wicaksono
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
279
214
0.767
* Total Citation Counts Rankings
Rankings
1,385,293
15,466
17
Ranking Based On Selection: 17
Sheeladitya Chakma (He/His)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
153
101
0.660
Environmental Management
Forest Landscape Restoration
* Total Citation Counts Rankings
Rankings
1,480,744
16,348
18
Ranking Based On Selection: 18
Peter Hanington
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
122
73
0.598
Environment
water
wetlands
coastal ecosystems
* Total Citation Counts Rankings
Rankings
1,671,251
17,819
19
Ranking Based On Selection: 19
Md Anisur Rahman
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
75
51
0.680
Biodiversity
diversity
conservation
regeneration
* Total Citation Counts Rankings
Rankings
1,852,815
18,890
20
Ranking Based On Selection: 20
Lynn Sorrentino
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
43
43
1.000
* Total Citation Counts Rankings
Rankings
2,101,002
19,995
21
Ranking Based On Selection: 21
Rio Doce Panel
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
16
16
1.000
impact assessment
ecosystem restoration
nature-based solutions
ecology economy
water management
* Total Citation Counts Rankings
Rankings
2,223,346
20,338
22
Ranking Based On Selection: 22
Md Mohsin Kabir
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8
7
0.875
* Total Citation Counts Rankings
Rankings
2,235,732
20,369
23
Ranking Based On Selection: 23
Daisy Hessenberger
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7
7
1.000
biodiversity
conservation
epigenetics
evolutionary theory