Comparing the two Greek archipelagos plant species diversity and endemism patterns highlight the importance of isolation and precipitation as biodiversity drivers

Table 4 Results of regressions for S, GE, RE, SIE, TS and TES with A

Data set	Function	R ²	p
Total species richness (S)
Ionian Islands (31 islands)	logS = 1.574 + 0.297 log A	0.888	0.0001
Aegean Islands (210 islands)	logS = 1.304 + 0.365 log A	0.765	0.0001
Greek endemics (GE)
Ionian Islands (10 islands)	GE = 4.137 + 0.0007 A	0.888	0.0001
Aegean Islands (144 islands)	GE = 5.100 + 0.0002 A	0.558	0.0001
Regional endemics (RE)
Ionian Islands (8 islands)	RE = 1.291 + 6.053E-5 A	0.526	0.05
Aegean Islands (65 islands)	RE = 3.393 + 5.606E-5 A	0.650	0.0001
Single Island endemics (SIE)
Ionian Islands (4 islands)	ns
Aegean Islands (18 islands)	SIE = -4.502 + 0.0002 A	0.923	0.0001
Threatened species (TS)
Ionian Islands (20 islands)	TS = 2.097 + 0.000 A	0.919	0.0001
Aegean Islands (116 islands)	TS = 6.804 + 0.000 A	0.591	0.0001
Threatened endemics (TES)
Ionian Islands (6 islands)	ns
Aegean Islands (91 islands)	TES = 3.371 + 0.000 A	0.542	0.0001

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