Table 1.

Mixed-effect models of the SDR among 1191 species. (Rank denotes the rank fit among 27 candidate models (only 1 of 15 ‘universal’ models is shown). Slope and intercept columns indicate the taxonomic levels at which each parameter varied (P = phylum, C = class, O = order and F = family). Mass denotes the overall mean scaling exponent; weight is the Akaike model weight; and cumWt is the cumulative sum of model weights.)

rank	slope effects				intercept effects				mass	AIC	∂AIC	weight	cumWt
1			O		P	C	O	F	−0.578	5067.12	0	0.454	0.454
2			O		P	C		F	−0.591	5068.33	1.21	0.247	0.701
3		C	O		P	C	O	F	−0.600	5069.67	2.55	0.127	0.828
4			O	F	P	C	O	F	−0.579	5070.65	3.54	0.077	0.905
5	P		O		P	C	O	F	−0.559	5070.78	3.67	0.073	0.978
6			O			C	O	F	−0.589	5075.32	8.20	0.008	0.985
7a					P	C	O	F	−0.545	5075.55	8.43	0.007	0.992
8		C			P	C	O	F	−0.580	5075.90	8.79	0.006	0.997
9	P				P	C	O	F	−0.518	5078.74	11.63	0.001	0.999
10				F	P	C	O	F	−0.549	5079.05	11.93	0.001	1
12			O		P	C	O		−0.594	5103.95	36.83	0	1
18			O		P		O	F	−0.551	5137.73	70.62	0	1

^aBest-fitting ‘universal’ model.