Resurveying Mediterranean coastal dunes: insights from the ReSarDu database

The vegetation resurvey is considered a valid approach for assessing how species composition, abundance, and distribution have evolved in response to anthropogenic pressures, climate change, and habitat alterations over recent decades. ReSarDu – Resurvey Sardinian Dunes – is the first regional database compiled from resurveys of coastal dune systems across Sardinia (Italy). It includes 418 resurveys ranging in size from 1 to 400 m2, collected between 2023 and 2025, based on 188 historical phytosociological relevés dating back to the 1970s. ReSarDu has been created to understand long-term vegetation changes in Sardinian coastal dune systems. By integrating historical and newly collected phytosociological data, we provide a comprehensive tool for assessing biodiversity trends and supporting effective conservation and restoration strategies.