The high Andes, gene flow and a stable hybrid zone shape the genetic structure of a wide-ranging South American parrot

Table 5 Results of the multivariate multiple regressions

Predictor Variable	Proportion of the explained genetic variation
	Marginal	Conditional	Sequential
Phenotype (sub-species definition)	0.2204	0.0156	0.0010
Ecoregions	0.0081	0.0075	0.0010
Climate (all variables)	0.8529	0.4812	0.4812
Climate (per variable)
Temperature Seasonality (SD * 100)	0.4856	0.2797	0.2797
Precipitation Seasonality (CV)	0.4118	0.1427	0.1100
Mean Monthly Temperature Range	0.1216	0.0472	0.0207
Precipitation of Wettest Quarter (mm)	0.0379	0.0249	0.0197
Minimum Temperature of Coldest Month	0.0195	0.0012	0.0154
Temperature Annual Range	0.3210	0.1919	0.0130
Isothermality (2/7) (* 100)	0.4364	0.2165	0.0106
Precipitation of Driest Quarter (mm)	0.2885	0.0685	0.0079
Mean Temperature of Wettest Quarter	0.1566	0.0846	0.0028
Precipitation of Coldest Quarter (mm)	0.0463	0.0080	0.0012
Precipitation of Warmest Quarter (mm)	0.0786	0.0552	--
Mean monthly minimum Temperature	0.0734	0.0605	--
Mean Temperature of Coldest Quarter	0.0510	0.0089	--
Mean Temperature of Warmest Quarter	0.2424	0.1662	--
Mean Temperature of Driest Quarter	0.0634	0.0461	--
Annual Mean Temperature	0.1296	0.0894	--
Precipitation of Wettest Month (mm)	0.0312	0.0207	--
Annual Precipitation	0.0830	0.0480	--
Mean monthly maximum Temperature	0.1615	0.0988	--
Precipitation of Driest Month (mm)	0.2880	0.0743	--
Maximum Temperature of Warmest Month	0.2987	0.1965	--

Analyses were carried out for 150 individual mitochondrial sequences of burrowing parrots, 21 bio-climatic parameters, morphological subspecies identity, and Chilean and Argentinean eco-regions.
--, added < 0.000001 to the regression sum of squares; CV: coefficient of variation; SD: standard deviation. No. of permutations = 9999. Temperature Seasonality: the standard deviation of the weekly mean temperatures expressed as a percentage of the mean of those temperatures (i.e. the annual mean). Precipitation Seasonality: the standard deviation of the weekly precipitation estimates expressed as a percentage of the mean of those estimates (i.e. the annual mean). See also Additional file 1 Table S1.

ISSN: 1742-9994