Table 1.
Result of regressions of Ambrosia artemisiifolia traits on latitude in the invasive (European) and native (North American) ranges
| Flowering time | Height | Total branches |
Male fitness |
Female fitness |
|
|---|---|---|---|---|---|
| EUROPE | |||||
| Estimate | −1.545*** | −0.672 | −0.120 | −9.523 | −0.578 |
| Std. error | (0.319) | (0.578) | (0.180) | (7.236) | (0.387) |
| Degrees of freedom | 231 | 228 | 227 | 228 | 194 |
| NORTH AMERICA | |||||
| Estimate | −4.694*** | −5.570*** | −0.333*** | −10.557 | −2.243*** |
| Std. error | (0.262) | (0.495) | (0.129) | (6.776) | (0.339) |
| Degrees of freedom | 287 | 285 | 284 | 285 | 262 |
Regressions were performed on maternal family means.
***
indicates p < .01