Pearson correlation coefficient between the independent variables used in this study for each Operational Geographical Unit (OGU), and dependent variables: Chondrichthyes species Richness (CSR), Chondrichthyes species Richness without Lessepsian invasive species (LCSR); Chondrichthyes species Richness without vagrant and visitors (VCSR); Chondrichthyes species Richness without highly migratory species (HCSR); Chondrichthyes species Richness without Lessepsian invasive species, highly migratory species, vagrant and visitors together (ALLCSR).

Pearson correlation coefficient is shown (significance in brackets). Key: LAT, latitude (degrees); LON, longitude (degrees); OAR, the OGU area (km2); DISTG, distance from the centroid of each OGU to the Strait of Gibraltar (km); DISTS, distance from the centroid of each OGU to the Suez Canal (km); SST, sea surface temperature (°C); SD, salinity in depth (PSU); FAM, number of taxonomic families of bony fishes per OGU. ** Significant correlation.

此处展示皮尔逊相关系数，其显著性水平标注于括号内。变量说明如下：LAT：纬度（单位：度）；LON：经度（单位：度）；OAR：OGU区域面积（单位：km²）；DISTG：各OGU的质心至直布罗陀海峡的距离（单位：km）；DISTS：各OGU的质心至苏伊士运河的距离（单位：km）；SST：海表温度（单位：°C）；SD：深度盐度（PSU）；FAM：各OGU内硬骨鱼的分类科数量。** 代表显著相关。