Ground Truth: insights from the first nationally coordinated Annex I habitat monitoring project in Italian National Parks.

Habitats are essential components of biodiversity, shaped by complex interactions of biotic and abiotic factors. They play a key role in assessing nature conservation status. Under the Habitats Directive (92/43/EEC), EU Member States must monitor Annex I habitats (Art. 11) to evaluate conservation trends and the effectiveness of biodiversity conservation policies. Despite efforts, standardized monitoring protocols remain a work in progress, whilst biodiversity loss continues to escalate globally. With funding from the National Recovery and Resilience Plan (NRRP), national-scale monitoring programs in Protected Areas are being implemented in Italy to provide a coherent conservation outlook in the frame of the DigitAP project, promoted by the Italian Ministry of the Environment and Energy Security (MASE) and coordinated by the Italian Institute for Environmental Protection and Research (ISPRA). One of the main objectives of the DigitAP project is to monitor Annex I habitats in Italian National Parks through vegetation surveys, aiming to establish a permanent network to support mediumand long-term monitoring (1). A team of vegetation operators, coordinated by a Temporary Grouping of Companies and supervised by the Italian Botanical Society (SBI), was hired to conduct annual vegetation surveys over two years. The project targets 98 Annex I habitats across 1,857 stratified-randomly located 100×100 m2 cells. Data collection follows national guidelines (2), with rigorous validation processes involving habitat- and territory-specific experts to ensure high-quality, accurate, and comparable data. Photos and videos further support data assessment. The sampling design is based on Annex I habitat maps for each National Park: sampling cells are assigned proportionally to habitat surface, and activities are scheduled according to habitat types (3) and vegetation phenology. Standard habitat-specific sampling areas have been defined. Ground validation, a critical phase, involves close collaboration between surveyors, validators, and coordinators. Custom GIS-based applications facilitate data collection and management. A server-based system enables real-time data storage, visualization, periodic backups, and interactive dashboards for quality control. The platform also archives photographic and video material to support remote validation. As the first survey year concludes, initial efforts focused on defining permanent monitoring plots and recording key structural species. The 2025 campaign will gather comprehensive floristic-vegetation data, establishing a baseline for long-term monitoring. Monitoring data will be integrated into the Italian National Biodiversity Network (NNB). This represents the first nationally coordinated habitat monitoring effort focused on Annex I habitats in protected areas. It marks a significant step toward building an effective conservation monitoring system, harmonizing national data, and enhancing territorial knowledge. The initiative contributes to implementing the 92/43/EEC "Habitats" Directive in Italy and Europe, fostering long-term biodiversity preservation. While addressing longstanding challenges in Annex I habitat monitoring, the initiative underscores the continued importance of classical field methods. 1) www.nnb.isprambiente.it/it/digitap/le-attivita/intervento-6 2) P. Angelini, L. Casella, A. Grignetti, P. Genovesi (Eds., 2016) ISPRA, Serie Manuali e Linee Guida, 142/2016: 12-14. ISBN 978-88- 448-0789-4 3) E. Biondi, et al. (2009) Manuale Italiano di Interpretazione degli Habitat della Direttiva 92/43/CEE. Società Botanica Italiana onlus - Ministero dell’Ambiente. http://vnr.unipg.it/habitat/