Table 5.

Summary of among-species GLMMs explaining differences in log-transformed Cd and Hg concentrations (µg/g dw) in tissues of 6 species from east Hudson Bay. Liver was used for vertebrate species. Tissue concentrations were lipid normalized. The explanatory variables included in the models were δ¹⁵N, δ¹³C, and δ³⁴S. Location of sample collection was included as a random effect. Significant results are in bold

Model		Estimate (β coef)	SE	df	t-value	P-value	Variance	SD
A) logCd ~ δ15N + δ13C + δ34S + (1 | location), n = 255
Fixed effects	(Intercept)	− 1.125	0.387	243.797	− 2.910	0.004
	δ15N	0.027	0.010	250.985	2.746	0.006
	δ13C	− 0.150	0.017	250.994	− 9.038	< 0.001
	δ34S	− 0.089	0.013	250.660	− 6.601	< 0.001
Random effects	Location						0.008	0.087
	Residual						0.224	0.474
B) logHg ~ δ15N + δ13C + δ34S + (1 | location), n = 240
Fixed effects	(Intercept)	− 1.511	0.507	125.951	− 2.980	0.003
	δ15N	0.171	0.013	234.460	13.668	< 0.001
	δ13C	− 0.117	0.021	234.119	− 5.539	< 0.001
	δ34S	− 0.189	0.017	234.857	− 11.398	< 0.001
Random effects	Location						0.113	0.335
	Residual						0.336	0.579