i10 Productivity
Rankings

US Environmental Protection Agency/ 64 Scientists Natural Sciences / Biological Science i10 Productivity Rankings - 2025

Total 2,449,317 scientists, country 221, and institutions 24,477 are evaluated in the Productivity Rankings, an exclusive service provided by AD Scientific Index. This ranking measures and highlights the scientific productivity of researchers based on the i10 index (number of publications with at least 10 citations). This system identifies highly productive scientists across disciplines, institutions, and regions, contributing to the development of evidence-based academic policies and effective incentive mechanisms. The rankings include global, regional, and institutional analyses, along with specialized rankings such as Scientists' Last 6 Years' i10 Index and Universities' i10 Index Rankings 2025. With Premium Membership, you can:

  • Gain full access to detailed comparisons and advanced analytics,
  • Objectively evaluate your academic productivity,
  • Make strategic, data-driven decisions to enhance performance.

* Total i10 IndexRankings
Ranking Based On Selection: 1
United States
Jorge W Santo Domingo
Molecular Microbial Ecology
drinking water
microbial ecology
environmental microbiology
water
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
131
93
0.710
* Total i10 IndexRankings
Ranking Based On Selection: 2
United States
Thomas B Knudsen
developmental biology
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
130
75
0.577
* Total i10 IndexRankings
Ranking Based On Selection: 3
United States
Jay Garland
environmental microbiology
microbial ecology
regenerative system design
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
125
62
0.496
* Total i10 IndexRankings
Ranking Based On Selection: 5
United States
Stephanie Padilla
neurotoxicology
developmental toxicology
chemical screening
zebrafish
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
108
46
0.426
* Total i10 IndexRankings
Ranking Based On Selection: 6
United States
Philip R Kaufmann|Philip Robert Kaufmann, P.R. Kaufmann
aquatic ecology
fluvial geomorphology
hydrology
physical habitat
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
92
63
0.685
* Total i10 IndexRankings
Ranking Based On Selection: 7
United States
Jana Compton
Nitrogen cycling
Phosphorus cycling
watersheds
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
77
59
0.766
* Total i10 IndexRankings
Ranking Based On Selection: 8
United States
Paul Mayer
ecosystem restoration
urban ecology
nitrogen
animal behavior
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
77
57
0.740
* Total i10 IndexRankings
Ranking Based On Selection: 9
United States
John L Stoddard
freshwater ecology
biogeochemistry
acidification
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
77
43
0.558
* Total i10 IndexRankings
Ranking Based On Selection: 10
United States
Charles R Lane
Wetland Ecology
Systems Ecology
Landscape Ecology
Watershed Management
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
76
61
0.803

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* Total i10 IndexRankings
Ranking Based On Selection: 11
United States
Scott G Leibowitz
landscape ecology
aquatic ecology
watershed modeling
spatial analysis
hydrological connectivity
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
67
53
0.791
* Total i10 IndexRankings
Ranking Based On Selection: 12
United States
Cathleen Wigand
wetland ecology
climate adaptation
eutrophication
salt marshes
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
67
44
0.657
* Total i10 IndexRankings
Ranking Based On Selection: 13
United States
Ken Fritz
non-perennial streams
headwaters
connectivity
invertebrates
disturbance
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
65
53
0.815
* Total i10 IndexRankings
Ranking Based On Selection: 15
United States
Sandy Raimondo
Ecological Risk Assessment
Population Modeling
Aquatic Toxicology
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
54
37
0.685
* Total i10 IndexRankings
Ranking Based On Selection: 16
United States
Glenn Suter
ecological risk assessment
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
53
21
0.396
* Total i10 IndexRankings
Ranking Based On Selection: 17
United States
Nathan Schumaker
Conservation Biology
Landscape Ecology
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
52
34
0.654
* Total i10 IndexRankings
Ranking Based On Selection: 18
United States
Christopher M Clark
Ecology
Nitrogen Deposition
Biofuels
Climate Change
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
48
42
0.875
* Total i10 IndexRankings
Ranking Based On Selection: 19
United States
John Johnston
ecology
watershed modeling
mercury exposure and bioaccumulation
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
44
33
0.750
* Total i10 IndexRankings
Ranking Based On Selection: 22
United States
Christopher Nietch
Systems Ecology
Biogeochemistry
Ecotoxicology
Stream Ecology
Nutrient Management
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
40
31
0.775
* Total i10 IndexRankings
Ranking Based On Selection: 23
United States
Steve Paulsen
fresh water ecology
large scale assessment
monitoring
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
39
26
0.667
* Total i10 IndexRankings
Ranking Based On Selection: 24
United States
Marguerite Pelletier
Estuarine Ecology
Benthic Invertebrates
Environmental Indicators
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
39
14
0.359
* Total i10 IndexRankings
Ranking Based On Selection: 25
United States
Tom Purucker
Ecology
Risk assessment
Computational modeling
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
38
29
0.763
* Total i10 Index Rankings
Rankings
Ranking Based On Selection: 1
Jorge W Santo Domingo
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
131
93
0.710
Molecular Microbial Ecology
drinking water
microbial ecology
environmental microbiology
water
* Total i10 Index Rankings
Rankings
Ranking Based On Selection: 2
Thomas B Knudsen
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
130
75
0.577
* Total i10 Index Rankings
Rankings
Ranking Based On Selection: 3
Jay Garland
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
125
62
0.496
environmental microbiology
microbial ecology
regenerative system design
* Total i10 Index Rankings
Rankings
Ranking Based On Selection: 4
James Lazorchak
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
109
54
0.495
* Total i10 Index Rankings
Rankings
Ranking Based On Selection: 5
Stephanie Padilla
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
108
46
0.426
neurotoxicology
developmental toxicology
chemical screening
zebrafish
* Total i10 Index Rankings
Rankings
Ranking Based On Selection: 6
Philip R Kaufmann|Philip Robert Kaufmann, P.R. Kaufmann
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
92
63
0.685
aquatic ecology
fluvial geomorphology
hydrology
physical habitat
* Total i10 Index Rankings
Rankings
Ranking Based On Selection: 7
Jana Compton
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
77
59
0.766
Nitrogen cycling
Phosphorus cycling
watersheds
* Total i10 Index Rankings
Rankings
Ranking Based On Selection: 8
Paul Mayer
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
77
57
0.740
ecosystem restoration
urban ecology
nitrogen
animal behavior
* Total i10 Index Rankings
Rankings
Ranking Based On Selection: 9
John L Stoddard
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
77
43
0.558
freshwater ecology
biogeochemistry
acidification
* Total i10 Index Rankings
Rankings
Ranking Based On Selection: 10
Charles R Lane
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
76
61
0.803
Wetland Ecology
Systems Ecology
Landscape Ecology
Watershed Management

Enroll all your faculty members with discounted institutional membership to showcase your institution's academic strength to the world in the best way possible – join now and achieve results fast! 

* Total i10 Index Rankings
Rankings
Ranking Based On Selection: 11
Scott G Leibowitz
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
67
53
0.791
landscape ecology
aquatic ecology
watershed modeling
spatial analysis
hydrological connectivity
* Total i10 Index Rankings
Rankings
Ranking Based On Selection: 12
Cathleen Wigand
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
67
44
0.657
wetland ecology
climate adaptation
eutrophication
salt marshes
* Total i10 Index Rankings
Rankings
Ranking Based On Selection: 13
Ken Fritz
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
65
53
0.815
non-perennial streams
headwaters
connectivity
invertebrates
disturbance
* Total i10 Index Rankings
Rankings
Ranking Based On Selection: 14
Theodore R Angradi
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
64
26
0.406
* Total i10 Index Rankings
Rankings
Ranking Based On Selection: 15
Sandy Raimondo
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
54
37
0.685
Ecological Risk Assessment
Population Modeling
Aquatic Toxicology
* Total i10 Index Rankings
Rankings
Ranking Based On Selection: 16
Glenn Suter
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
53
21
0.396
* Total i10 Index Rankings
Rankings
Ranking Based On Selection: 17
Nathan Schumaker
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
52
34
0.654
* Total i10 Index Rankings
Rankings
Ranking Based On Selection: 18
Christopher M Clark
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
48
42
0.875
Ecology
Nitrogen Deposition
Biofuels
Climate Change
* Total i10 Index Rankings
Rankings
Ranking Based On Selection: 19
John Johnston
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
44
33
0.750
ecology
watershed modeling
mercury exposure and bioaccumulation
* Total i10 Index Rankings
Rankings
Ranking Based On Selection: 20
Matthew Etterson
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
43
29
0.674
* Total i10 Index Rankings
Rankings
Ranking Based On Selection: 21
James D. Hagy III
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
41
30
0.732
* Total i10 Index Rankings
Rankings
Ranking Based On Selection: 22
Christopher Nietch
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
40
31
0.775
Systems Ecology
Biogeochemistry
Ecotoxicology
Stream Ecology
Nutrient Management
* Total i10 Index Rankings
Rankings
Ranking Based On Selection: 23
Steve Paulsen
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
39
26
0.667
fresh water ecology
large scale assessment
monitoring
* Total i10 Index Rankings
Rankings
Ranking Based On Selection: 24
Marguerite Pelletier
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
39
14
0.359
Estuarine Ecology
Benthic Invertebrates
Environmental Indicators
* Total i10 Index Rankings
Rankings
Ranking Based On Selection: 25
Tom Purucker
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
38
29
0.763
Ecology
Risk assessment
Computational modeling
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