0004 0.00125 0.0025 4.62 Total species richness 1 16 53 275 Maximum elevation (m) 2 6 8 27 Distance from island
(km) 0.04 0.04 0.04 5.4 Distance from mainland (km) 0.108 0.108 0.108 0.108 Number of islands 201 64 35 19 The value presented is the minimum value observed for any www.selleckchem.com/products/kpt-330.html island supporting at least Akt inhibitor one species from each category Table 2 presents the correlation coefficient between species richness (both total and endemic) and each of the geographical variables examined. Total species richness and regional endemic species richness were most strongly (positively) correlated to island area, to maximum elevation, and to the index of human presence, and less strongly but also significantly to geological diversity. Regional endemic species richness was also strongly positively
correlated to total species richness. The richness of species endemic to an island group was most strongly correlated to island maximum elevation and to island area, then to total species richness and to the degree of human impact; all correlations were positive. Finally, single-island endemic species richness was most strongly correlated to island maximum elevation, then to total species richness and to island area; again all correlations were positive. Regional endemic species richness was positively correlated to the distance from the nearest inhabited island but negatively correlated to the distance from the mainland, while richness Entospletinib of single-island Rho endemics and island
group endemics was not correlated with distance from either the mainland or the nearest inhabited islands. Table 2 Spearman rank correlation coefficients of all pairwise correlations between biodiversity and geographical variables All species Aegean regional endemics Island group endemics Single-island endemics Number of islands 201 64 35 19 Maximum elevation 0.753** 0.660** 0.685** 0.803** Island area 0.885** 0.658** 0.639** 0.671** Index of human impact 0.731** 0.609** 0.563* 0.451 Number of geological substrata 0.485** 0.313* 0.351* 0.520* Latitude −0.027 0.005 −0.159 −0.043 Longitude −0.077 0.026 0.310 0.044 Distance to inhabited island 0.388** 0.328* 0.161 0.059 Distance to mainland −0.112 −0.175* −0.279 −0.161 Total species richness 0.683** 0.612** 0.728** Statistically significant correlations are indicated by asterisk. * P < 0.05, ** P < 0.001 Figure 2 shows the species–area relationship for total species richness (circles) and for single-island endemics (squares). The small island effect was not observed for total species richness (species–area relationship), but for single-island endemics (endemics–area relationship) the effect was apparent (Fig. 2).