Forest Fragmentation in South East Asia

Forest Fragmentation indices for South East Asia: A spatial raster representation of forest fragmentation indices. The entire study area is divided into rectangular grid cells with an edge length of 5 arc minutes (approximately 9 × 9 km). The forest cover data is obtained from the Global Forest Change data base (Hansen et al., 2013). Combining the initial forest cover raster maps and the yearly forest loss raster maps serve to derive yearly measures of fragmentation for each grid cell with the landscapemetrics package (Hesselbarth et al., 2019) in R 3.6 (R Core Team, 2020), which implements the calculation of landscape metrics from the widely employed FRAGSTATS software (McGarigal et al., 2002). The fragmentation metrics calculated are the perimeter-area fractal dimension (PAFRAC), the mean of the core area index (CAI_MN), the area-weighted mean of the core area index (CAI_AM), the coefficient of variation of the core area index (CAI_CV), clumpiness index (CLUMPY), and the normalized landscape shape index (nLSI).