Data Sources and Citation Metrics
The 5th edition of the Research.com Best Ecology and Evolution Scientists in United States Ranking is primarily derived from a comprehensive compilation of bibliometric data sourced from OpenAlex and CrossRef, supplemented by multiple other reputable data repositories. The citation-based metrics utilized to formulate this ranking were collected as of January 12, 2026. A scientist’s position within the ranking is determined by their D-index (Discipline H-index), a refined bibliometric indicator that includes only those publications and citation counts directly relevant to the specified discipline of Ecology and Evolution. This targeted approach ensures that each researcher’s impact is evaluated strictly within the context of their core area of expertise.
Scope of Research and Qualification Criteria
In developing this ranking, a total of 279,971 scientist profiles were assessed across all scientific disciplines, with a focused subset of 2,769 scientists identified specifically within Ecology and Evolution. To qualify for inclusion in this ranking, a scientist must have a D-index of at least 30, and a majority of their tier publications must be concentrated in Ecology and Evolution. Additionally, notable awards and achievements relevant to this field were considered as supplementary indicators of scholarly excellence.
The D-index threshold is calibrated as an increment of 10 relative to the total estimated number of scholars in each discipline, carefully formulated to ensure that the top 1% of leading researchers are represented. Furthermore, there is a requirement that the difference between a scholar’s general H-index and their D-index should not exceed 30%, thereby ensuring a robust alignment between general impact and disciplinary-specific contributions.
Verification and Validation Practices
Recognizing that raw bibliometric data alone cannot serve as an absolute evaluation tool, all scientist profiles included in this ranking underwent rigorous manual verification. Profiles were cross-validated against publications indexed in a wide range of trusted sources to ensure accuracy and legitimacy. While the number of papers published in prominent journals and conference proceedings does not directly influence the computed ranking position, these metrics provide a meaningful secondary signal highlighting a researcher’s contribution to the field.
The ranking methodology prioritizes the D-index calculated from data amassed primarily through OpenAlex and CrossRef, two of the most prominent and respected bibliometric databases accessible to the research community. For a detailed description of our robust methodology, readers are encouraged to visit our methodology page.
Research.com’s Mission and Vision
At Research.com, our mission is to inspire researchers, industry leaders, and policymakers worldwide to closely monitor and understand the trajectories of leading experts in diverse scientific domains. By revealing who the foremost experts are within specific fields, countries, and research institutions, we aim to foster greater knowledge exchange and collaboration across the global scientific community. This ranking, a product of meticulous and careful work, embodies our commitment to delivering reliable, transparent, and credible evaluations of scientific excellence to support informed decision-making and academic advancement.
