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Table 5 Stepwise multiple regression models explaining range size

From: Geographic location and phylogeny are the main determinants of the size of the geographical range in aquatic beetles

Lineage

R 2

F

P

Variables

β

t

P

Ilybius

75.5

23.66

0.000

maxLat

0.38

3.16

0.004

    

PVR24

-0.50

-4.39

0.000

    

PVR20

0.35

3.09

0.005

Deronectes

63.2

18.03

0.000

maxLat

0.70

5.26

0.000

    

PVR19

0.31

2.34

0.030

Enicocerus

98.6

121.15

0.000

maxLat

0.52

6.89

0.001

    

maxLon

0.47

7.83

0.001

    

PVR4

-0.18

-2.83

0.036

Limnebius

75.9

11.01

0.007

maxLat

0.55

2.96

0.021

    

PVR5

-0.60

-3.18

0.016

H. gracilis

69.2

12.35

0.002

maxLat

0.58

3.33

0.007

    

PVR1

-0.45

-2.56

0.027

H. dentipes

72.3

46.96

0.000

maxLat

0.85

6.85

0.000

Phothydraena

81.8

13.49

0.006

minLat

-0.51

-2.89

0.028

    

Habitat1

0.69

3.94

0.008

Graptodytes

88.8

36.89

0.000

maxLat

0.68

7.06

0.000

    

PVR8

-0.32

-3.36

0.005

    

Habitat0

-0.26

-2.75

0.016

Hydroporus

91.7

69.29

0.000

maxLat

0.70

10.93

0.000

    

PVR4

-0.36

-5.77

0.000

    

PVR7

-0.17

-2.91

0.008

    

PVR21

0.19

3.15

0.004

Hydrochus

78.6

18.31

0.000

maxLat

0.59

3.72

0.004

    

PVR8

0.46

2.90

0.016

  1. Summary table for the stepwise multiple regression models explaining range size in the different lineages. We show for each model the explained variance (R2 in percentage) and its significance (F and P values). For each variable included in the model, the fitted standardized regression coefficient (β) and its corresponding significance (t and P values) are shown. Variable codes as in Table 2. PVR# refers to phylogenetic vectors used in PVR approach.