Format: ORAL

Rosina Magaa Ugarte, Alba Gutirrez-Girn, Daniel Snchez-Mata Rosario G. Gaviln

Botany Unit, Pharmacology, Pharmacognosy and Botany Dept., Complutense University, Madrid, Spain

The environmental particularities of the Mediterranean a dry season during the vegetative period and a cold season during the rest of the year make the plausible climate change impacts on the unique Mediterranean summits more severe. A significant number of endemic species, primarily orophytes, are found in this region as a result of the particular conditions that have worked as a selective pressure on plant species. Nevertheless, the biodiversity found in these areas may be in jeopardy as a result of climate change. Dry spells have become more common in central Spain over the last decade, and experts predict that these high elevations will experience even more dry spells as a result of global warming. Our research is centred on identifying the most significant changes in plant diversity that have occurred or are occurring in the summits of the Sistema Central (Sierra de Guadarrama, Sierra de Gredos and Sierra de Bjar) a 300 km mountain range in the centre of the Iberian Peninsula that separates the southern and northern plateaus. This has been accomplished by utilising climatic data derived from GLORIA soil temperature dataloggers and supplementary records from the AEMET (National Meteorological Institute), as well as vegetation data gathered from permanent plots of three surveys of two GLORIA study regions over a span of 17 years (20062023). We used multivariate approaches and GLMMs to examine the relationships between diversity patterns and climatic conditions. Here, we will go over the main findings concerning species richness, species cover (especially for endemic species and shrubs), colonisation or loss events and how they relate to trends in temperature and precipitation.