Citation Rankings (Highly Cited Researchers) and the list of the most cited and influential researchers cover a wide range of scientific fields, spanning 197 main and sub-disciplines, as well as the Art and Humanities Citation Rankings and Social Sciences and Humanities Citation Rankings, offering a unique service. Additionally, the list without CERN, Statistical Data, etc., provided exclusively by “AD Scientific Index”, is part of our effort to balance the situation created by CERN and researchers with statistical data, who have an advantage over others, especially those in the social and humanities fields. There should be new regulations for multi-author and CERN papers. Citation lists also reveal many rule violations and unethical practices. See also for more specific citation analyses: 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
aquatic ecology
freshwater ecology
marine ecology
invasive species
biological invasions
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
24,132
6,721
0.279
* Total Citation Counts Rankings
Ranking Based On Selection :2
aquatic ecology
biogeochemistry
limnology
wetland ecology
freshwater ecology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
12,328
6,180
0.501
* Total Citation Counts Rankings
Ranking Based On Selection :3
aquatic ecology
estuarine & river ecology
environmental sciences
water & nature management
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,920
986
0.167
* Total Citation Counts Rankings
Ranking Based On Selection :4
Aquatic ecology
Biogeochemistry
Limnology
Microbiology
Wetlands
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,872
1,882
0.655
* Total Citation Counts Rankings
Ranking Based On Selection :5
Aquatic ecology
River ecology
Biological invasions
Freshwater molluscs
Freshwater fish
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
744
556
0.747
Gerard Van Der Velde
Radboud University
Nijmegen, Netherlands
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
24,132
6,721
0.279
aquatic ecology
freshwater ecology
marine ecology
invasive species
biological invasions
Leon Pm Lamers
Radboud University
Nijmegen, Netherlands
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
12,328
6,180
0.501
aquatic ecology
biogeochemistry
limnology
wetland ecology
freshwater ecology
Piet H Nienhuis
Radboud University
Nijmegen, Netherlands
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,920
986
0.167
aquatic ecology
estuarine & river ecology
environmental sciences
water & nature management
Annelies J Veraart
Radboud University
Nijmegen, Netherlands
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,872
1,882
0.655
Aquatic ecology
Biogeochemistry
Limnology
Microbiology
Wetlands
Frank Collas
Radboud University
Nijmegen, Netherlands
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
744
556
0.747
Aquatic ecology
River ecology
Biological invasions
Freshwater molluscs
Freshwater fish