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

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

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

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: 4

biology
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
109
54
0.495
* Total i10 IndexRankings
Ranking Based On Selection: 5

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

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

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

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

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

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

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

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

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: 14

Aquatic ecology
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
64
26
0.406
* Total i10 IndexRankings
Ranking Based On Selection: 15

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

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

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

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

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: 20

i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
43
29
0.674
* Total i10 IndexRankings
Ranking Based On Selection: 21

Estuarine Ecology
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
41
30
0.732
* Total i10 IndexRankings
Ranking Based On Selection: 22

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

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

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

Ecology
Risk assessment
Computational modeling
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
38
29
0.763
Jorge W Santo Domingo
US Environmental Protection Agency
Washington, United States
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
Thomas B Knudsen
US Environmental Protection Agency
Washington, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
130
75
0.577
Jay Garland
US Environmental Protection Agency
Washington, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
125
62
0.496
environmental microbiology
microbial ecology
regenerative system design
James Lazorchak
US Environmental Protection Agency
Washington, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
109
54
0.495
Stephanie Padilla
US Environmental Protection Agency
Washington, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
108
46
0.426
neurotoxicology
developmental toxicology
chemical screening
zebrafish
Philip R Kaufmann|Philip Robert Kaufmann, P.R. Kaufmann
US Environmental Protection Agency
Washington, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
92
63
0.685
aquatic ecology
fluvial geomorphology
hydrology
physical habitat
Jana Compton
US Environmental Protection Agency
Washington, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
77
59
0.766
Nitrogen cycling
Phosphorus cycling
watersheds
Paul Mayer
US Environmental Protection Agency
Washington, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
77
57
0.740
ecosystem restoration
urban ecology
nitrogen
animal behavior
John L Stoddard
US Environmental Protection Agency
Washington, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
77
43
0.558
freshwater ecology
biogeochemistry
acidification
Charles R Lane
US Environmental Protection Agency
Washington, United States
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!
Scott G Leibowitz
US Environmental Protection Agency
Washington, United States
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
Cathleen Wigand
US Environmental Protection Agency
Washington, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
67
44
0.657
wetland ecology
climate adaptation
eutrophication
salt marshes
Ken Fritz
US Environmental Protection Agency
Washington, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
65
53
0.815
non-perennial streams
headwaters
connectivity
invertebrates
disturbance
Theodore R Angradi
US Environmental Protection Agency
Washington, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
64
26
0.406
Sandy Raimondo
US Environmental Protection Agency
Washington, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
54
37
0.685
Ecological Risk Assessment
Population Modeling
Aquatic Toxicology
Glenn Suter
US Environmental Protection Agency
Washington, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
53
21
0.396
Nathan Schumaker
US Environmental Protection Agency
Washington, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
52
34
0.654
Conservation Biology
Landscape Ecology
Christopher M Clark
US Environmental Protection Agency
Washington, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
48
42
0.875
Ecology
Nitrogen Deposition
Biofuels
Climate Change
John Johnston
US Environmental Protection Agency
Washington, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
44
33
0.750
ecology
watershed modeling
mercury exposure and bioaccumulation
Matthew Etterson
US Environmental Protection Agency
Washington, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
43
29
0.674
James D. Hagy III
US Environmental Protection Agency
Washington, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
41
30
0.732
Christopher Nietch
US Environmental Protection Agency
Washington, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
40
31
0.775
Systems Ecology
Biogeochemistry
Ecotoxicology
Stream Ecology
Nutrient Management
Steve Paulsen
US Environmental Protection Agency
Washington, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
39
26
0.667
fresh water ecology
large scale assessment
monitoring
Marguerite Pelletier
US Environmental Protection Agency
Washington, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
39
14
0.359
Estuarine Ecology
Benthic Invertebrates
Environmental Indicators
Tom Purucker
US Environmental Protection Agency
Washington, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
38
29
0.763
Ecology
Risk assessment
Computational modeling