Figure shows the significant environmental variables of the fitted GLM models, on count data of R. alpina in PA during 2015. In figures A), B) and D) LOESS (locally weighted scatter plot smoothing) function has been used. A larger number of individuals was observed on trees with DBH greater than 80 cm, dying, belonging to the middle-advanced decay status and distance less than 300 m from other colonised trees.

  Part of: Campanaro A, Redolfi De Zan L, Hardersen S, Antonini G, Chiari S, Cini A, Mancini E, Mosconi F, Rossi de Gasperis S, Solano E, Bologna MA, Sabbatini Peverieri G (2017) Guidelines for the monitoring of Rosalia alpina. In: Carpaneto GM, Audisio P, Bologna MA, Roversi PF, Mason F (Eds) Guidelines for the Monitoring of the Saproxylic Beetles protected in Europe. Nature Conservation 20: 165-203.