Table 3. AICc model ranking for feather Hg concentrations within the Kerguelen seabird community (see text for details).

Models	AICc	ΔAICca	wi b	R2adj	gdf
species+δ15N	78.79	0.00	0.999	0.96	1.00
species+δ13C+species* δ13C	97.08	18.29	<0.001	0.96	1.00
species+δ15N+species* δ15N	99.36	20.57	<0.001	0.96	1.00
species+CRP+ species* CRP	110.12	31.33	<0.001	0.96	1.00
species+CRP	110.12	31.33	<0.001	0.96	1.00
species	110.12	31.33	<0.001	0.96	1.00
species+δ13C	110.20	31.41	<0.001	0.96	1.00
δ15N	841.16	762.37	<0.001	0.37	0.03
CRP	930.02	851.23	<0.001	0.14	<0.001
null	971.35	892.56	<0.001	0.00	<0.001
δ13C	972.11	893.32	<0.001	<0.01	<0.001

Abbreviations: AICc, bias-adjusted Akaike’s Information Criteria values;

w_i, AICc weights; R²adj, R-squared adjusted; gdf, goodness-of-fit; CRP, duration of the chick rearing period.

^aScaled ΔAICc; ΔAICc = 0.00 is interpreted as the best fit to the data among the models.

^bWeight of evidence interpreted as a proportion. Weights across all models sum to 1.00.