Bibliometric data utilized to devise the citation-based metrics underpinning this ranking were collected on January 12, 2026. A scientist’s position in the ranking is determined by their D-index (Discipline H-index), a refined metric that focuses exclusively on papers and citations pertaining to the specific discipline under examination. This approach allows for a precise and discipline-specific evaluation of scholarly impact, distinguishing it from the traditional global H-index.
Scope of Research and Inclusion Criteria
The ranking draws from an extensive pool of 279,971 scientist profiles identified across diverse bibliometric databases spanning all academic disciplines. Within this broad dataset, 521 scientist profiles were specifically recognized as experts in the field of Ecology and Evolution.
To qualify for inclusion in this ranking, a scientist’s D-index had to meet a minimum threshold of 30, ensuring that only highly impactful researchers are considered. Furthermore, the majority of a qualifying scientist’s tier publications needed to be in the domain of Ecology and Evolution, thereby affirming their substantive engagement with the discipline. Additionally, notable awards and accomplishments within Ecology and Evolution were factored into consideration to complement quantitative measures.
The threshold for the D-index is dynamically calibrated in increments of 10, relative to the estimated total number of scholars in each discipline. This methodology guarantees that the top 1% of leading researchers are included in the list. Moreover, to maintain consistency and relevance, a scientist’s general H-index and their discipline-specific D-index must demonstrate a proximity difference of no more than 30%.
Verification and Validation Practices
The team behind this ranking acknowledges that raw bibliometric data alone is insufficient to comprehensively assess scholarly output or quality. Therefore, all scientist profiles included in the ranking underwent meticulous manual verification. Each profile was carefully cross-referenced against publications documented in a broad spectrum of trusted academic sources to ensure authenticity and accuracy.
While the ranking’s position is established solely through the D-index informed by OpenAlex and CrossRef, the number of publications in high-impact journals and conference proceedings remains a valuable secondary indicator of a scientist’s contributions within their research area. This additional dimension offers further insight into a researcher’s influence and engagement with the wider scientific community.
OpenAlex and CrossRef stand as the most prominent and trusted bibliometric databases accessible to researchers globally, lending credibility and transparency to the ranking process. For a detailed outline of the methodological framework underpinning this ranking, we invite readers to visit our methodology page.
Research.com’s Mission and Vision
Research.com is committed to fostering a data-driven understanding of scientific leadership worldwide. Our mission is to motivate researchers, corporate entities, and policymakers to monitor the trajectories of leading experts and to provide a transparent means for the global scientific community to identify top specialists in specific fields, across different nations, and even within individual research institutions.
Through rigorous and methodical aggregation and validation of bibliometric data, Research.com aims to empower informed decision-making and collaboration, enhancing the recognition of scientific excellence and promoting the advancement of knowledge internationally.
