Present and past presence of Santolina ligustica

The data frame reports the presence of Santolina ligustica. Distribution is reported as presence in a grid at 0.0003825773 x 0.000266708 degrees centigrade of resolution (extent: 9.480258, 9.637115, 44.15192, 44.26713; crs: +proj=longlat +datum=WGS84 +no_defs). The column "x" and "y" reported the centroids of the cells where specie occur. The column "Distribution_1999" shows the presence of the species as reported in Torricelli et al. 1999. In the file "Distribution_2021.tif" is reported the presence of the species detected by the authors during field surveys carried out in 2020 and 2021.