Total 2,424,675 scientists, country 221, and institutions 24,468 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
![Brynhildur Davidsdottir](/user/assets/images/profile/no-profile-photo.png)
Ecological economics
industrial ecology
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
122
106
0.869
* Total i10 IndexRankings
Ranking Based On Selection: 2
![Snæbjörn Pálsson](https://cdn.adscientificindex.com/pictures/90/1846595.jpg)
Evolutionary biology
population genetics
molecular ecology
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
81
50
0.617
* Total i10 IndexRankings
Ranking Based On Selection: 3
![Gisli Mar Gislason](https://cdn.adscientificindex.com/pictures/de/1842437.jpg)
Stream communities
ecosystem ecology
population dynamics
dispersal
island biogeography
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
68
27
0.397
* Total i10 IndexRankings
Ranking Based On Selection: 4
![Sigurður Snorrason](https://cdn.adscientificindex.com/pictures/35/1846564.jpg)
Developmental Biology
Evolutionary Ecology
Animal Behaviour
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
65
40
0.615
* Total i10 IndexRankings
Ranking Based On Selection: 5
![Arni Einarsson](/user/assets/images/profile/no-profile-photo.png)
Ecology
archaeology
limnology
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
62
30
0.484
* Total i10 IndexRankings
Ranking Based On Selection: 6
![Tómas Grétar Gunnarsson](https://cdn.adscientificindex.com/pictures/3a/1847440.jpg)
ecology
habitats
conservation
migratory populations
waders/shorebirds
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
51
39
0.765
* Total i10 IndexRankings
Ranking Based On Selection: 7
![Rannveig Olafsdottir](/user/assets/images/profile/no-profile-photo.png)
Environmental management
environmental planning
sustainable tourism
sustainable tourism indicators
tourism and climate chang
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
47
38
0.809
* Total i10 IndexRankings
Ranking Based On Selection: 8
![Arnthor Gardarsson](https://cdn.adscientificindex.com/pictures/14/1839265.jpg)
conservation biology
ecology
seabirds
limnology
ornithology
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
46
8
0.174
* Total i10 IndexRankings
Ranking Based On Selection: 9
![Deanne Bird](https://cdn.adscientificindex.com/pictures/21/1840383.jpg)
Disaster risk reduction
climate change adaptation
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
43
33
0.767
* Total i10 IndexRankings
Ranking Based On Selection: 10
![Filipa Samarra](https://cdn.adscientificindex.com/pictures/4e/1841655.jpg)
Behavioural Ecology
Animal Behaviour
Bioacoustics
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
41
31
0.756
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* Total i10 IndexRankings
Ranking Based On Selection: 11
![Valgerdur Andrésdóttir](/user/assets/images/profile/no-profile-photo.png)
Biology
Virology
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
41
12
0.293
* Total i10 IndexRankings
Ranking Based On Selection: 12
![Asa L Aradottir](/user/assets/images/profile/no-profile-photo.png)
Ecological restoration
birch woodlands
succession
ecosystem services
carbon sequestration
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
37
20
0.541
* Total i10 IndexRankings
Ranking Based On Selection: 13
![Bradley A Thayer](/user/assets/images/profile/no-profile-photo.png)
international politics
international security
conflict
offensive realism
evolution and international politics
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
35
16
0.457
* Total i10 IndexRankings
Ranking Based On Selection: 14
![Egill Erlendsson](https://cdn.adscientificindex.com/pictures/12/1841072.jpg)
Palynology
climate
soil erosion
archaeology
vegetation
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
33
27
0.818
* Total i10 IndexRankings
Ranking Based On Selection: 15
![Jón Einar Jónsson](https://cdn.adscientificindex.com/pictures/ee/1843474.jpg)
Birds
animal behavior
physiology
zoology
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
32
14
0.438
* Total i10 IndexRankings
Ranking Based On Selection: 16
![Einar Árnason](/user/assets/images/profile/no-profile-photo.png)
Population genetics
population genomics
molecular evolution
biometry
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
32
11
0.344
* Total i10 IndexRankings
Ranking Based On Selection: 17
![Gunnsteinn Haraldsson](https://cdn.adscientificindex.com/pictures/e4/1842545.jpg)
General microbiology
molecular microbiology
molecular typing
molecular epidemiology
microbial ecology.
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
28
21
0.750
* Total i10 IndexRankings
Ranking Based On Selection: 18
![Valborg Gudmundsdottir](https://cdn.adscientificindex.com/pictures/60/1847531.jpg)
proteomics
genomics
systems biology
data integration
type 2 diabetes
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
25
24
0.960
* Total i10 IndexRankings
Ranking Based On Selection: 19
![Arnar Palsson](https://cdn.adscientificindex.com/pictures/e2/1839257.jpg)
Population genetics
quantitative genetics
transcriptional evolution
transcriptional cooption
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
25
18
0.720
* Total i10 IndexRankings
Ranking Based On Selection: 20
![Petur Henry Petersen](/user/assets/images/profile/no-profile-photo.png)
Neurobiology
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
23
18
0.783
* Total i10 IndexRankings
Ranking Based On Selection: 21
![Gunnar Thor Hallgrimsson](https://cdn.adscientificindex.com/pictures/da/1842542.jpg)
zoology
ornithology
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
23
18
0.783
* Total i10 IndexRankings
Ranking Based On Selection: 22
![Guðbjörg Ásta Ólafsdóttir](https://cdn.adscientificindex.com/pictures/56/1842516.jpg)
Behavioral ecology
evolutionary ecology
fish biology
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
16
12
0.750
* Total i10 IndexRankings
Ranking Based On Selection: 23
![Reynir Smari Atlason](https://cdn.adscientificindex.com/pictures/d5/4484476.jpg)
Industrial Ecology
Sustainable Finance
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
13
8
0.615
* Total i10 IndexRankings
Ranking Based On Selection: 24
![Ellen Gunnarsdottir](https://cdn.adscientificindex.com/pictures/2a/1841248.jpg)
Molecular Anthropology
Evolutionary Genetics
Ancient DNA
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
10
10
1.000
* Total i10 IndexRankings
Ranking Based On Selection: 25
![Kevin Dillman](https://cdn.adscientificindex.com/pictures/ce/5083098.jpg)
Sustainability
Ecological Economics
Industrial Ecology
Sustainable Consumption
Life Cycle Assessment
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
8
8
1.000
Brynhildur Davidsdottir
University of Iceland
Reykjavík, Iceland
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
122
106
0.869
Ecological economics
industrial ecology
Snæbjörn Pálsson
University of Iceland
Reykjavík, Iceland
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
81
50
0.617
Evolutionary biology
population genetics
molecular ecology
Gisli Mar Gislason
University of Iceland
Reykjavík, Iceland
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
68
27
0.397
Stream communities
ecosystem ecology
population dynamics
dispersal
island biogeography
Sigurður Snorrason
University of Iceland
Reykjavík, Iceland
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
65
40
0.615
Developmental Biology
Evolutionary Ecology
Animal Behaviour
Arni Einarsson
University of Iceland
Reykjavík, Iceland
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
62
30
0.484
Tómas Grétar Gunnarsson
University of Iceland
Reykjavík, Iceland
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
51
39
0.765
ecology
habitats
conservation
migratory populations
waders/shorebirds
Rannveig Olafsdottir
University of Iceland
Reykjavík, Iceland
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
47
38
0.809
Environmental management
environmental planning
sustainable tourism
sustainable tourism indicators
tourism and climate chang
Arnthor Gardarsson
University of Iceland
Reykjavík, Iceland
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
46
8
0.174
conservation biology
ecology
seabirds
limnology
ornithology
Deanne Bird
University of Iceland
Reykjavík, Iceland
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
43
33
0.767
Disaster risk reduction
climate change adaptation
Filipa Samarra
University of Iceland
Reykjavík, Iceland
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
41
31
0.756
Behavioural Ecology
Animal Behaviour
Bioacoustics
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Valgerdur Andrésdóttir
University of Iceland
Reykjavík, Iceland
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
41
12
0.293
Asa L Aradottir
Agricultural University of Iceland
Hvanneyri, Iceland
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
37
20
0.541
Ecological restoration
birch woodlands
succession
ecosystem services
carbon sequestration
Bradley A Thayer
University of Iceland
Reykjavík, Iceland
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
35
16
0.457
international politics
international security
conflict
offensive realism
evolution and international politics
Egill Erlendsson
University of Iceland
Reykjavík, Iceland
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
33
27
0.818
Palynology
climate
soil erosion
archaeology
vegetation
Jón Einar Jónsson
University of Iceland
Reykjavík, Iceland
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
32
14
0.438
Birds
animal behavior
physiology
zoology
Einar Árnason
University of Iceland
Reykjavík, Iceland
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
32
11
0.344
Population genetics
population genomics
molecular evolution
biometry
Gunnsteinn Haraldsson
University of Iceland
Reykjavík, Iceland
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
28
21
0.750
General microbiology
molecular microbiology
molecular typing
molecular epidemiology
microbial ecology.
Valborg Gudmundsdottir
University of Iceland
Reykjavík, Iceland
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
25
24
0.960
proteomics
genomics
systems biology
data integration
type 2 diabetes
Arnar Palsson
University of Iceland
Reykjavík, Iceland
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
25
18
0.720
Population genetics
quantitative genetics
transcriptional evolution
transcriptional cooption
Petur Henry Petersen
University of Iceland
Reykjavík, Iceland
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
23
18
0.783
Gunnar Thor Hallgrimsson
University of Iceland
Reykjavík, Iceland
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
23
18
0.783
Guðbjörg Ásta Ólafsdóttir
University of Iceland
Reykjavík, Iceland
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
16
12
0.750
Behavioral ecology
evolutionary ecology
fish biology
Reynir Smari Atlason
University of Iceland
Reykjavík, Iceland
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
13
8
0.615
Industrial Ecology
Sustainable Finance
Ellen Gunnarsdottir
University of Iceland
Reykjavík, Iceland
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
10
10
1.000
Molecular Anthropology
Evolutionary Genetics
Ancient DNA
Kevin Dillman
University of Iceland
Reykjavík, Iceland
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
8
8
1.000
Sustainability
Ecological Economics
Industrial Ecology
Sustainable Consumption
Life Cycle Assessment