i10 Productivity
Rankings

US Environmental Protection Agency ScientistsNatural Sciences / Biological Science i10 Productivity Rankings 2025

Productivity Rankings is an exclusive service provided by AD Scientific Index. This ranking system, derived from the i10 index, highlights the productivity of scientists in publishing impactful scientific articles. Productivity Rankings serves as a tool to identify highly productive scientists across specific areas, disciplines, universities, and countries, and supports the creation of effective incentives and academic policies. The global, regional, and institutional rankings of scientists in this table are calculated based on their total i10 index. Moreover, you can explore special rankings derived from Productivity Rankings, such as Scientists Last 6 Years' i10 Index, Universities Total i10 Index Rankings 2025, Universities Last 6 Years' i10 Index Rankings 2025, Art and Humanities i10 Productivity Rankings, and Social Sciences and Humanities i10 Productivity Rankings.

* Total i10 IndexRankings
Ranking Based On Selection :1
United States
Thomas B Knudsen
developmental biology
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
130
79
0.608
* Total i10 IndexRankings
Ranking Based On Selection :2
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
129
103
0.798
* 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
70
0.560
* 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
51
0.472
* Total i10 IndexRankings
Ranking Based On Selection :6
United States
Philip R Kaufmann|Philip Robert Kaufmann, P.R. Kaufmann
aquatic ecology
geomorphology
hydrology
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
91
65
0.714
* Total i10 IndexRankings
Ranking Based On Selection :7
United States
Paul Mayer
ecosystem restoration
urban ecology
nitrogen
animal behavior
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
77
58
0.753
* Total i10 IndexRankings
Ranking Based On Selection :8
United States
John L Stoddard
freshwater ecology
biogeochemistry
acidification
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
77
44
0.571
* Total i10 IndexRankings
Ranking Based On Selection :9
United States
Jana Compton
Nitrogen cycling
Phosphorus cycling
watersheds
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
76
63
0.829
* 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
63
0.829
* 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
56
0.836
* 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
51
0.761
* 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
56
0.862
* Total i10 IndexRankings
Ranking Based On Selection :14
United States
Theodore R Angradi
Aquatic ecology
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
63
27
0.429
* 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
39
0.722
* 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
23
0.434
* 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
51
36
0.706
* 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
47
42
0.894
* 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
43
36
0.837
* Total i10 IndexRankings
Ranking Based On Selection :21
United States
James D. Hagy III
Estuarine Ecology
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
41
32
0.780
* 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
33
0.825
* 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
28
0.718
* 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
Thomas B Knudsen
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
130
79
0.608
* Total i10 Index Rankings
Rankings
Ranking Based On Selection: 2
Jorge W Santo Domingo
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
129
103
0.798
Molecular Microbial Ecology
drinking water
microbial ecology
environmental microbiology
water
* Total i10 Index Rankings
Rankings
Ranking Based On Selection: 3
Jay Garland
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
125
70
0.560
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
108
56
0.519
* Total i10 Index Rankings
Rankings
Ranking Based On Selection: 5
Stephanie Padilla
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
108
51
0.472
neurotoxicology
developmental toxicology
chemical screening
zebrafish
* Total i10 Index Rankings
Rankings
Ranking Based On Selection: 6
* Total i10 Index Rankings
Rankings
Ranking Based On Selection: 7
Paul Mayer
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
77
58
0.753
ecosystem restoration
urban ecology
nitrogen
animal behavior
* Total i10 Index Rankings
Rankings
Ranking Based On Selection: 8
John L Stoddard
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
77
44
0.571
freshwater ecology
biogeochemistry
acidification
* Total i10 Index Rankings
Rankings
Ranking Based On Selection: 9
Jana Compton
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
76
63
0.829
Nitrogen cycling
Phosphorus cycling
watersheds
* 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
63
0.829
Wetland Ecology
Systems Ecology
Landscape Ecology
Watershed Management
* 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
56
0.836
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
51
0.761
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
56
0.862
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
63
27
0.429
* Total i10 Index Rankings
Rankings
Ranking Based On Selection: 15
Sandy Raimondo
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
54
39
0.722
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
23
0.434
* Total i10 Index Rankings
Rankings
Ranking Based On Selection: 17
Nathan Schumaker
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
51
36
0.706
* Total i10 Index Rankings
Rankings
Ranking Based On Selection: 18
Christopher M Clark
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
47
42
0.894
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
43
36
0.837
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
32
0.780
* Total i10 Index Rankings
Rankings
Ranking Based On Selection: 22
Christopher Nietch
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
40
33
0.825
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
28
0.718
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