Table 3. Results of 2-way ANOVA (fixed factors) for the population growth rates (lambda) variable.

Growth rate	lambda (λ)
Groups of populations compared	d.f.	F	p
a. Comparison between Northern and Southern species (central locations only)
Temperature	4	4.89	0.010
Species	1	0.30	0.591
Temperature * Species	4	6.19	0.004
b. Southern species: comparison between marginal and central locations
Temperature	4	17.40	<0.001
Marginality	1	1.89	0.190
Temperature * Marginality	4	0.70	0.601
c. Northern species: comparison among locations
Location	2	1.43	0.294
Temperature	4	0.56	0.698

Significant p-values are indicated in bold.