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Table 2 Summary of different diversity indicators in Hedera according to the five biogeographic regions recognized

From: Phylogenetic and paleobotanical evidence for late Miocene diversification of the Tertiary subtropical lineage of ivies (Hedera L., Araliaceae)

Biogeographic region

Nspp

Ploidy levels

Interior Hps

Tip Hps

Observed PD

Lower PD

Upper PD

W Mediterranean

8

2×, 4×, 6×, 8×

6

7

72.05***

73.51

75.12

E Mediterranean

3

2×, 6×, 8×

0

2

44.95*

38.73

41.77

Europe

2

2×, 4×

2

3

43.53n.s.

31.29

34.64

W Asia

3

2×, 6×, 8×

1

2

44.34***

38.92

41.98

E Asia

2

2×

1

4

32.54***

38.31

41.47

  1. Nspp: Number of species, HPs: Haplotypes, Observed PD: Faith's Phylogenetic Diversity Index [48, 52], Lower PD and Upper PD: Lower and upper bounds of the null distribution of the empirical randomization of PD. Level of significance is indicated as followed: ***P≤0.001, *P≤0.05, n.s. P >0.05. Interior and tip haplotypes are according to Fig. 4