Citation Rankings
Highly Cited Researchers
NASA Ames Research Center Highly Cited Researchers CitationNatural Sciences / Biological Science Rankings 2025
The Citation Rankings (Highly Cited Researchers) 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
carbon cycle
remote sensing
electromagnetic theory
forest ecology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
35,995
20,714
0.575
* Total Citation Counts Rankings
Ranking Based On Selection :2
Ecology
tropical forest
Amazon
biogeochemistry
land use change
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
28,122
9,768
0.347
* Total Citation Counts Rankings
Ranking Based On Selection :3
Microbial Ecology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,899
1,949
0.283
* Total Citation Counts Rankings
Ranking Based On Selection :4
Earth System Science
Terrestrial Ecology
Carbon Cycle
Biodiversity
Remote Sensing
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,353
3,084
0.708
* Total Citation Counts Rankings
Ranking Based On Selection :5
AGN
galaxy evolution
black hole physics
large scale structure
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,960
2,984
0.754
* Total Citation Counts Rankings
Ranking Based On Selection :6
Space Biology
Cell and Developmental Biology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,647
761
0.209
* Total Citation Counts Rankings
Ranking Based On Selection :7
Airborne Science
Forest Ecology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,912
1,121
0.385
* Total Citation Counts Rankings
Ranking Based On Selection :8
biodiversity
laser scanning
imaging spectroscopy
process-based modeling
functional ecology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,841
2,482
0.874
* Total Citation Counts Rankings
Ranking Based On Selection :9
Ecology and evolution
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,417
438
0.181
* Total Citation Counts Rankings
Ranking Based On Selection :10
High-redshift galaxies
Galaxy Evolution
Reionization
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,272
1,947
0.857
* Total Citation Counts Rankings
Ranking Based On Selection :11
Remote Sensing
Landscape Ecology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,193
1,280
0.584
* Total Citation Counts Rankings
Ranking Based On Selection :12
interdisciplinary collaboration
emergence
research data management
qualitative research
astrobiology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,125
1,185
0.558
* Total Citation Counts Rankings
Ranking Based On Selection :13
Plant Ecology
Fire Ecology
Florida scrub
rare plants
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,047
331
0.162
* Total Citation Counts Rankings
Ranking Based On Selection :14
Space Biology
Biotechnology
Human Spaceflight
Astronaut Health and Performance
Astrobiology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,974
1,463
0.741
* Total Citation Counts Rankings
Ranking Based On Selection :15
Microbiology
Evolution
Astrobiology
Space Biology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,756
1,014
0.577
* Total Citation Counts Rankings
Ranking Based On Selection :16
ecology
agriculture
remote sensing
climate change
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,646
611
0.371
* Total Citation Counts Rankings
Ranking Based On Selection :17
Landscape Biogeochemistry
Ecosystem Ecology
Remote Sensing
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,458
1,043
0.715
* Total Citation Counts Rankings
Ranking Based On Selection :18
Space Biology
Ecology
LASSO Contract
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,427
340
0.238
* Total Citation Counts Rankings
Ranking Based On Selection :19
microbial ecology and evolution
complex systems science
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,065
445
0.418
* Total Citation Counts Rankings
Ranking Based On Selection :20
Remote sensing
forest ecology
ecosystem modeling
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,022
983
0.962
* Total Citation Counts Rankings
Ranking Based On Selection :21
Wildllife Ecology
quantitative ecology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,009
490
0.486
* Total Citation Counts Rankings
Ranking Based On Selection :22
Systems biology
microbial energy metabolism
astrobiology
bioengineering
biogeochemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
835
714
0.855
* Total Citation Counts Rankings
Ranking Based On Selection :23
ecology
forests
land cover change
remote sensing
earth system science
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
790
573
0.725
* Total Citation Counts Rankings
Ranking Based On Selection :24
Remote sensing
Hyperspectral
Terrestrial ecology
Agriculture
Geodesy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
595
574
0.965
* Total Citation Counts Rankings
Ranking Based On Selection :25
Ecology
Evolution
Landscape genetics
Remote sensing
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
522
468
0.897
* Total Citation Counts Rankings
Rankings
16,867
7,933
25
Ranking Based On Selection: 1
Sassan Saatchi
NASA Ames Research Center
California, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
35,995
20,714
0.575
carbon cycle
remote sensing
electromagnetic theory
forest ecology
* Total Citation Counts Rankings
Rankings
24,752
11,399
45
Ranking Based On Selection: 2
Michael Keller
NASA Ames Research Center
California, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
28,122
9,768
0.347
Ecology
tropical forest
Amazon
biogeochemistry
land use change
* Total Citation Counts Rankings
Rankings
148,524
56,042
348
Ranking Based On Selection: 3
Brad Bebout
NASA Ames Research Center
California, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,899
1,949
0.283
* Total Citation Counts Rankings
Rankings
233,451
81,910
491
Ranking Based On Selection: 4
Ryan Pavlick
NASA Ames Research Center
California, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,353
3,084
0.708
Earth System Science
Terrestrial Ecology
Carbon Cycle
Biodiversity
Remote Sensing
* Total Citation Counts Rankings
Rankings
254,660
88,139
537
Ranking Based On Selection: 5
Chien-Ting Chen
NASA Ames Research Center
California, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,960
2,984
0.754
AGN
galaxy evolution
black hole physics
large scale structure
* Total Citation Counts Rankings
Rankings
273,617
93,538
567
Ranking Based On Selection: 6
Sigrid Reinsch
NASA Ames Research Center
California, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,647
761
0.209
Space Biology
Cell and Developmental Biology
* Total Citation Counts Rankings
Rankings
330,748
109,857
663
Ranking Based On Selection: 7
Matthew Fladeland
NASA Ames Research Center
California, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,912
1,121
0.385
* Total Citation Counts Rankings
Rankings
337,315
111,691
675
Ranking Based On Selection: 8
Fabian D Schneider
NASA Ames Research Center
California, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,841
2,482
0.874
biodiversity
laser scanning
imaging spectroscopy
process-based modeling
functional ecology
* Total Citation Counts Rankings
Rankings
383,162
124,386
721
Ranking Based On Selection: 9
Ken Cullings
NASA Ames Research Center
California, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,417
438
0.181
* Total Citation Counts Rankings
Rankings
401,257
129,261
745
Ranking Based On Selection: 10
Ramesh Mainali
NASA Ames Research Center
California, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,272
1,947
0.857
High-redshift galaxies
Galaxy Evolution
Reionization
* Total Citation Counts Rankings
Rankings
411,977
132,205
766
Ranking Based On Selection: 11
Naiara Pinto
NASA Ames Research Center
California, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,193
1,280
0.584
Remote Sensing
Landscape Ecology
* Total Citation Counts Rankings
Rankings
421,677
134,891
781
Ranking Based On Selection: 12
Arsev Umur Aydinoğlu
NASA Ames Research Center
California, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,125
1,185
0.558
interdisciplinary collaboration
emergence
research data management
qualitative research
astrobiology
* Total Citation Counts Rankings
Rankings
433,493
138,176
798
Ranking Based On Selection: 13
Paul Schmalzer
NASA Ames Research Center
California, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,047
331
0.162
Plant Ecology
Fire Ecology
Florida scrub
rare plants
* Total Citation Counts Rankings
Rankings
444,759
141,126
811
Ranking Based On Selection: 14
Fathi Karouia
NASA Ames Research Center
California, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,974
1,463
0.741
Space Biology
Biotechnology
Human Spaceflight
Astronaut Health and Performance
Astrobiology
* Total Citation Counts Rankings
Rankings
482,400
151,262
859
Ranking Based On Selection: 15
Craig Everroad
NASA Ames Research Center
California, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,756
1,014
0.577
Microbiology
Evolution
Astrobiology
Space Biology
* Total Citation Counts Rankings
Rankings
504,156
157,025
889
Ranking Based On Selection: 16
Yen-Ben Cheng
NASA Ames Research Center
California, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,646
611
0.371
ecology
agriculture
remote sensing
climate change
* Total Citation Counts Rankings
Rankings
545,006
167,770
945
Ranking Based On Selection: 17
K Dana Chadwick
NASA Ames Research Center
California, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,458
1,043
0.715
Landscape Biogeochemistry
Ecosystem Ecology
Remote Sensing
* Total Citation Counts Rankings
Rankings
552,568
169,737
961
Ranking Based On Selection: 18
Thomas Dreschel
NASA Ames Research Center
California, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,427
340
0.238
Space Biology
Ecology
LASSO Contract
* Total Citation Counts Rankings
Rankings
655,862
196,247
1,066
Ranking Based On Selection: 19
Jessica Audrey Lee
NASA Ames Research Center
California, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,065
445
0.418
microbial ecology and evolution
complex systems science
* Total Citation Counts Rankings
Rankings
670,419
199,915
1,096
Ranking Based On Selection: 20
Alexey Shiklomanov
NASA Ames Research Center
California, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,022
983
0.962
Remote sensing
forest ecology
ecosystem modeling
* Total Citation Counts Rankings
Rankings
675,360
201,098
1,105
Ranking Based On Selection: 21
Eric Stolen
NASA Ames Research Center
California, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,009
490
0.486
Wildllife Ecology
quantitative ecology
* Total Citation Counts Rankings
Rankings
743,092
217,348
1,189
Ranking Based On Selection: 22
Jared T Broddrick
NASA Ames Research Center
California, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
835
714
0.855
Systems biology
microbial energy metabolism
astrobiology
bioengineering
biogeochemistry
* Total Citation Counts Rankings
Rankings
762,722
221,867
1,209
Ranking Based On Selection: 23
Emil A Cherrington
NASA Ames Research Center
California, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
790
573
0.725
ecology
forests
land cover change
remote sensing
earth system science
* Total Citation Counts Rankings
Rankings
858,259
242,778
1,323
Ranking Based On Selection: 24
Yoseline Angel Lopez
NASA Ames Research Center
California, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
595
574
0.965
Remote sensing
Hyperspectral
Terrestrial ecology
Agriculture
Geodesy
* Total Citation Counts Rankings
Rankings
900,998
251,575
1,363
Ranking Based On Selection: 25
Keith Gaddis
NASA Ames Research Center
California, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
522
468
0.897
Ecology
Evolution
Landscape genetics
Remote sensing