Table A2.

δ¹⁵N, δ¹³C, C:N and TP in intra-population level (OPT, DEF) grouping by stage (PRE, POST, TOTAL) and years (GOM17,GOM18). ANCOVA analysis result (F, p) using AGE as covariate and ANOVA results. NS = Non-significant; * p < 0.05; ** p < 0.01.

			OPT(+)				DEF(−)				ANCOVA		ANOVA
	GOM17		n	Min	Max	Mean ± SD	n	Min	Max	Mean ± SD	F1,52	p	F1,52	p
TOTAL		δ15N	27	3.43	4.67	4.15 ± 0.33	28	3.79	5.86	4.75 ± 0.56	19.83	**
		δ13C		−19.4	−18.7	−19.1 ± 0.20		−20.3	−18.1	−19.2 ± 0.46	2.626	NS
		CN		3.76	4.30	4.05 ± 0.13		3.62	4.96	4.33 ± 0.31	18.31	**
	GOM18		n	Min	Max	Mean ± SD	n	Min	Max	Mean ± SD	F1,59	p	F1,59	p
		δ15N	36	5.46	7.69	6.26 ± 0.46	26	5.69	9.04	6.95 ± 0.93	19.68	**
		δ13C		−19.9	−18.2	−18.7 ± 0.40		−19.9	−18.3	−18.8 ± 0.31			0.23	NS
		CN		3.86	5.01	4.26 ± 0.28		3.92	5.79	4.44 ± 0.39	5.324	*
	GOM17		n	Min	Max	Mean ± SD	n	Min	Max	Mean ± SD	F1,27	p	F1,27	p
PRE		δ15N	15	3.82	5.55	4.33 ± 0.44	15	3.96	5.86	4.94 ± 0.59			10.09	**
		δ13C		−19.4	−18.8	−19.1 ± 0.18		−20.3	−18.8	−19.4 ± 0.47			3.985	NS
		CN		4.04	4.66	4.20 ± 0.17		4.06	4.82	4.43 ± 0.25			8.317	**
	GOM18		n	Min	Max	Mean ± SD	n	Min	Max	Mean ± SD	F1,23	p	F1,23	p
		δ15N	11	5.72	7.69	6.50 ± 0.56	14	6.06	9.04	7.53 ± 0.84	24.81	**
		δ13C		−19.4	−18.4	−18.7 ± 0.29		−19.0	−18.4	−18.7 ± 0.18			0.148	NS
		CN		3.95	5.01	4.36 ± 0.21		4.07	4.97	4.51 ± 0.29			1.71	NS
	GOM17		n	Min	Max	Mean ± SD	n	Min	Max	Mean ± SD	F1,26	p	F1,26	p
POST		δ15N	14	3.27	4.67	4.04 ± 0.44	11	3.79	4.95	4.33 ± 0.34			3.32	NS
		δ13C		−19.3	−18.7	−19.1 ± 0.22		−19.7	−18.9	−19.2 ± 0.21			2.37	NS
		CN		3.74	4.30	3.98 ± 0.15		3.62	4.20	4.03 ± 0.16	4.74	*
		TP(1.46)		3.77	4.72	4.29 ± 0.30		4.13	4.92	4.49 ± 0.23			3.32	NS
	GOM18		n	Min	Max	Mean ± SD	n	Min	Max	Mean ± SD	F1,26	p	F1,26	p
		δ15N	15	5.46	6.63	6.10 ± 0.39	14	5.69	6.52	6.07 ± 0.26			0.078	NS
		δ13C		−19.7	−18.2	−18.6 ± 0.41		−20.5	−18.4	−19.1 ± 0.61	9.72	**
		CN		3.86	4.94	4.14 ± 0.26		3.92	7.97	4.73 ± 1.06			4.76	*
		TP(1.46)		3.17	3.97	3.61 ± 0.27		3.33	3.90	3.59 ± 0.18			0.078	NS