APPENDIX 2. Explained Variance and Factor Loadings of the PCA Axes Included in SEA Analysis

APPENDIX 1. Descriptive statistics of physical and chemical parameters measured in the characterization of aquatic habitats, of native species from the invaded assemblage. T: water temperature; Oxygen: dissolved oxygen in water; Cond: water conductivity

APPENDIX 2. Explained variance and factor loadings of the PCA axes included in SEA analysis

APPENDIX 1

n / Surface area
(m²) / Depth
(cm) / Slope / T
(ºC) / Oxygen
(mg/L) / pH / Cond
(μS.cm‾¹)
Alytes obstetricans / 30 / Mean
Range / 69
2-705 / 36
3-121 / 11.57
0.77-44.91 / 18
14-28 / 5.26
0.28-15.60 / 8.41
7.20-9.01 / 299
33-1182
Epidalea
calamita / 11 / Mean
Range / 1130
27-10337 / 7
2-16 / 6.70
1.50-16.33 / 21
17-25 / 7.91
3.01-16.10 / 8.14
7.11-9.70 / 359
55-1532
Bufo spinosus / 13 / Mean
Range / 349
2-4032 / 41
6-225 / 8.44
3.00-23.98 / 17
13-21 / 6.32
0.91-8.64 / 8.22
7.50-9.10 / 240
42-568
Hyla
meridionalis / 14 / Mean
Range / 895
3-5765 / 49
12-109 / 8.68
0.84-22.20 / 21
16-35 / 4.99
0.28-10.30 / 8.34
7.50-9.01 / 251
108-419
Pelobates cultripes / 18 / Mean
Range / 2765
24-10337 / 38
12-88 / 2.53
0.79-9.81 / 19
14-29 / 8.16
2.14-18.51 / 7.86
6.60-9.57 / 379
80-1872
Pelodytes
punctatus / 22 / Mean
Range / 1813
8-15410 / 31
4-82 / 5.54
0.81-17.19 / 21
11-26 / 10.60
0.68-19.24 / 8.05
6.00-9.57 / 539
114-1532
Pelophylax
perezi / 12 / Mean
Range / 913
5-5765 / 66
13-225 / 9.68
0.84-13.95 / 25
16-35 / 5.57
0.58-14.60 / 8.37
7.44-9.06 / 262
108-419

APPENDIX 2

Variables / PCA1 / PCA2
Pond variables / % Explained variance
Surface area
Depth
Slope
Temperature
Dissolved Oxygen
pH
Conductivity / 25.84
0.15
-0.34
-0.59
0.52
0.80
0.47
0.44 / 19.95
0.79
0.14
-0.41
-0.04
-0.19
-0.63
0.38
Larval morphology / % Explained variance
Area
Span ratio
Mean gray value / 51.13
0.75
-0.85
-0.49 / 31.51
0.48
-0.06
-0.84