Table 1.

Results of phylogenetically adjusted (phylogenetic) or conventional PGLS analyses. (Frequency is always treated as the dependent variable. Type, classification for gas exchange pattern (CGE or DGE). λ, a measure of phylogenetic correlation. Type and mass×type columns present coefficients from the regression analyses (where significant). The coefficient for type quantifies the extent to which the intercept for DGE species differs from that for CGE species. AIC, Akaike information criterion; w_i, Akaike weight. Cycle frequency in mHz; mass (M_b) in g. ^*p<0.05; ^**p<0.01; ^***p<0.001; n.s., not significant.)

model variables	group	model	λ	AIC	wi	slope±s.e.	type	mass×type
fC versus Mb	all	conventional	0	97.32	0.002	−0.366±0.050***
	all	phylogenetic	0.82	90.80	0.047	−0.342±0.062***
fC versus Mb + type	all	conventional	0	96.17	0.003	−0.338±0.052***	n.s.
	all	phylogenetic	0.84	85.47	0.679	−0.280±0.064***	−0.335±0.123**
fC versus Mb + type + Mb×type	all	conventional	0	97.11	0.002	−0.280±0.077***	n.s.	n.s.
	all	phylogenetic	0.84	87.34	0.267	−0.261±0.083***	−0.364±0.147*	n.s.
fC versus Mb	CGE	phylogenetic	0.79	48.58		−0.297±0.092**
	DGE	phylogenetic	1	41.15		−0.195±0.085*