The EuropaBON Stakeholder Dashboard: A dynamic web application to map Europe’s biodiversity community

PLOS One | https://doi.org/10.1371/journal.pone.0329390 August 13, 2025 14 / 16 Supporting information S1 File. Full list of questions from the registration form. (JSON) S2 File. Examples of data cleansing measures for the input “Indicate your position in the biodiversity data flow”. (DOCX) S3 File. SQL Query to group the members according to their institution. The SQL query aggregates detailed infor- mation about the institutions, including their country, events attended, occupational sector, projects, realms, scopes, direc- tives, EU regions, data-sharing interactions, and geographic coordinates. (SQL) S4 File. API endpoints. (DOCX) S5 File. JSON response of ID 1 as name-value pair. (JS) S6 File. JavaScript options for the network graph. (JS) S7 File. Technical specifications and licence. (DOCX) S1 Fig. Cumulative number of new network registrations over the course of the EuropaBON project. (TIF) S2 Fig. Distribution of data providers, -users, and organisations that are both, data providers and users, visu- alised across different occupational sectors. Citizen scientists are excluded from this figure due to the small number of stakeholders that belong to this occupational category. Stakeholders that could not be categorised into either of these groups were classified as “other” and are also excluded from this figure. (TIF) S3 Fig. Marginal effects of the negative binomial model for degree centrality and number of activities. Mar- ginal effects and corresponding 95% confidence intervals calculated for explanatory variables grouped into

categories (i.e., position in the data flow, occupational sector, geographical region, realm, and EU directives). Dependent variables are stakeholder connectedness (degree centrality) and participation in EuropaBON stake- holder events (number of activities). Filled- and open circles indicate significant (p-value 0.05) and non-significant effects on degree centrality and number of activities that stakeholders participated in. Filled red circles indicate reference levels. (TIF) Acknowledgments We gratefully acknowledge the expertise and time of our IT colleagues at iDiv, especially Sebastian Eulau and Christopher Zimmermann, in setting up the IT infrastructure and the Docker environment. The authors would also like to thank Emily Wendt (iDiv, Germany) for her support on this project. The authors would like to express their gratitude to the German Centre for Integrative Biodiversity Research (iDiv) for hosting the project coordination.