Fig 1.
Map of the study area showing the geographic location of the Socotra Archipelago, (a, b) and the type of protection in the Zoning Plan designations over an elevation map (c). Geographic Coordinate System, Datum WGS84, Units in decimal Degrees.
Table 1.
Total number of presence data of endemic reptiles of Socotra Island used in the species distribution models (SDMs), including the training (train) and test datasets, average and standard deviation (SD) of AUC for SDM replicates, and average percent contribution of each landscape variable (LV) to SDMs. LVs contributing >20% to SDMs are highlighted in bold.
Table 2.
Correlation values (ρ) of richness of total, wide-range and restricted-range species/lineages, and of the differences between species and lineage richness, with latitude (lat), longitude (lon) and 14 landscape variables (described in S3 Table). Absolute ρ>0.20 are highlighted in bold. All correlations were significant (P<0.05).
Table 3.
The number (nr) of grid cells of species (sp) and lineages (ln), in total, in comparison with the island area (range), and within each category of the Zoning Plan, as well as species conservation status (status), representation targets and target achievement (≥100% if above target) of the 57 biodiversity features and the fourth quantile of richnesses is showed. Species codes follow Table 1 and lineages are identified by a number. Restricted-range species and their lineages (restr.) are shaded in grey.
Fig 2.
Patterns of biodiversity features.
Spatial patterns of reptile diversity on Socotra Island, including maps of relative percent of species and lineage richness for the total number of biodiversity features (maximum per grid cell = 18 and 30, respectively), wide-range (maximum per grid cell = 13 and 26, respectively) and restricted-range taxa (maximum per grid cell = 5 and 6, respectively), as well as the percent differences between the species and lineage richness outputs. Geographic Coordinate System, Datum WGS84, Units in decimal Degrees.
Fig 3.
Protection of different biodiversity features comparison.
Box-plots depicting the percent richness of the different biodiversity features falling within the different categories of Socotra’s Zoning Plan (rectangular colors match zoning plan category colors in Fig 1), including mean (thick line), first and third quartile (box), 1.5 interquartile range (whiskers) and outliers (dots). Categories include species richness (sp, in red) and lineage richness (ln, in blue) for total (black thick lines) and restricted-range biodiversity features (restr., grey thick lines).
Fig 4.
Design of new protected areas.
Outputs of the reserve design analysis using either all species (red) or all lineages (blue) as targets. The areas where the two outputs coincide are marked in green. The locations of the different categories of the existing Zoning Plan are presented to highlight extent of overlap. Geographic Coordinate System, Datum WGS84, Units in decimal Degrees.