Distribution of eight forest habitats of European Interest in mainland Spain, and R code for Korcak fragmentation analysis
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1. Vector coverages (shapefiles, 1:50,000, EPSG 25830) of the distribution of eight zonal forest types in mainland Spain. The dominant species and Habitat Type code (European Habitats Directive 92/43 EEC) are: • Fagus sylvatica (9120, 9130 and 9150) • Quercus robur and Q. pyrenaica (9230) • Q. suber (9330) • Pinus uncinata (9430) • P. nigra ssp. salzmannii (9530) • P. pinea (subset of 9540) 2. R scripts to determine patchiness using the Korcak exponent B. This is computed both for the entire range of patch sizes and for size intervals using a segmented regression approach. Such intervals are automatically detected.
1. 西班牙本土八种地带性森林类型分布的矢量覆盖数据(Shapefile格式,比例尺1:50000,坐标参考系EPSG 25830)。其优势树种及栖息地类型编码依据《欧盟生境指令92/43/EEC》,具体如下: • 欧洲水青冈(Fagus sylvatica),对应编码9120、9130及9150 • 夏栎(Quercus robur)与比利牛斯栎(Quercus pyrenaica),对应编码9230 • 栓皮栎(Quercus suber),对应编码9330 • 瑞士山松(Pinus uncinata),对应编码9430 • 黑松萨尔茨曼亚种(Pinus nigra subsp. salzmannii),对应编码9530 • 意大利石松(Pinus pinea),为9540类别的子集 2. 用于基于科尔恰克指数(Korcak exponent)B计算斑块性的R脚本。该计算同时覆盖斑块尺寸的全范围与细分尺寸区间,采用分段回归方法完成,且尺寸区间将自动识别。




