Table 1.
Summary of traits used as explanatory variables in the analyses for identifying potential drivers of invasiveness in Araceae. The number of species for which data were available is shown (out of a total of 3494 species). The range and median values for integer variables are shown in parentheses.
| Trait | Levels | Number of species | Type of variable |
|---|---|---|---|
| Introduction dynamics | Food source; medicine; fibre production; horticulture; agroforestry; phytoremediation | 546 | Categorical |
| Total number of uses | 546 | Integer (1–5; 1) | |
| Number of introduced regions (proxy for propagule pressure) | 514 | Integer (1–50; 1) | |
| Native range | 34 floristic native regions classified according to Good (1974) | 3490 | Categorical, binary |
| Total number of native regions (proxy for range size) | 3490 | Integer (1–31; 1) | |
| Habitat (desert and xeric shrubland; Mediterranean forests, woodland and scrub; temperate mixed forest; tropical dry forest; tropical moist forest) | 3494 | Categorical | |
| Biological traits | Pollinator type (bees; beetles; flies; combination) | 3250 | Categorical |
| Flower sexuality (bisexual; unisexual) | 3470 | Categorical, binary | |
| Regeneration mechanism (seed; vegetative; both) | 444 | Categorical | |
| Life form chamaephyte; epiphyte; geophyte; helophyte; hemicryptophyte; hemiepiphyte; hyrdophyte; lithophyte; phanerophyte | 3426 | Categorical |