Biodiversity mediates relationships between anthropogenic drivers and ecosystem services across global mountain, island and delta systems

•Biodiversity mediates many anthropogenic-ecosystem service relations.•Species richness weakens more associations, whereas intactness amplifies more.•Climate change had most weakened associations, population the most amplified.•Abiotic, biotic and anthropogenic drivers are important to ecosystem service level.•Biodiversity interactions are strongest in mountains and weakest in deltas.