Table 1 Percentage contribution of predictors used in Maxent niche modelling in diploids and tetraploids of Festuca amethystina. Models with two sets of predictors were used and compared in the analysis: only climatic and climatic + geology (parent material of soil) variables.

From: Tetraploids expanded beyond the mountain niche of their diploid ancestors in the mixed-ploidy grass Festuca amethystina L.

Predictors

Diploids

Tetraploids

Clim

Clim + Geo

Clim

Clim + Geo

Temperature

Bio1 —Annual Mean Temperature

16.8

18.6

7.2

1.0

Bio7 —Annual Temperature Range

10.2

6.5

23.1

7.4

Bio9 —Mean Temperature of the Driest Quarter

3.0

2.3

52.9

36.6

Precipitation

Bio12—Annual Precipitation

53.4

31.6

1.7

0.0

Bio18—Precipitation of the Warmest Quarter

16.5

15.2

7.5

0.8

Bio19—Precipitation of the Coldest Quarter

0.0

0.0

7.6

7.0

Geology (parent material of soil)

n.a.

25.7

n.a.

47.1