Table 2. Mean ± standard deviation values of δ¹³C and δ¹⁵N of algal genus considered in the mixing model analysis taken from Mahahual, Xahuayxol and Xcalak, the asterisks represent the sources under Sargassum effect.

Mahahual			Xahuayxol			Xcalak
Genus	δ13C	δ15N	Genus	δ13C	δ15N	Genus	δ13C	δ15N
Caulerpa	−9.89± 0.15	2.22± 0.01	Caulerpa	−8.86± 0.19	5.68± 0.01	Caulerpa	−12.60± 0.04	1.00± 0.10
Caulerpa*	−16.22± 0.55	0.93±0.08	Dictyota	−15.71± 0.90	2.29± 0.41	Caulerpa*	−9.63± 0.02	2.02± 0.08
Dictyota	−16.38± 1.23	1.56±1.37	Dictyota*	−16.31± 0.95	0.71± 0.02	Codium	−12.17 ± 0.07	1.25 ± 0.07
Dictyota*	−15.95 ± 0.04	0.82 ± 0.04	Halimeda*	−12.61 ± 1.70	0.88 ± 0.01	Dictyota	−15.47 ± 0.68	0.67 ± 0.03
Halimeda	−7.01 ± 1.25	0.29 ± 0.43	Laurencia	−14.81 ± 0.23	1.36 ± 0.71	Dictyota*	−15.69 ± 0.20	0.04 ± 0.06
Halimeda*	−8.39 ± 0.69	0.68 ± 0.12	Lobophora*	−10.49 ± 1.35	0.33 ± 0.64	Lobophora	−14.15 ± 0.53	0.77 ± 0.33
Laurencia	−16.16 ± 0.90	2.61 ± 1.41	Penicillus	−11.51 ± 8.28	1.84 ± 0.30	Padina	−10.18 ± 0.18	0.25 ± 0.19
Stypopodium	−11.33 ± 0.52	0.67 ± 0.05	Sargassum	−14.65 ± 1.82	3.21 ± 0.23	Penicillus	−14.50 ± 0.08	0.06 ± 0.08
Turf	−13.44 ± 0.00	3.03 ± 0.02	Stypopodium	−16.80 ± 1.40	1.47 ± 0.56	Penicillus*	−9.75 ± 0.14	1.98 ± 0.04
Turf*	−16.54 ± 0.22	−0.51 ± 0.02	Turf	−16.43 ± 1.32	1.84 ± 0.30	Sargassum*	−14.76 ± 0.87	0.37 ± 0.08
Udotea	−12.86 ± 0.42	2.19 ± 0.03	Turf*	−18.56 ± 0.04	−0.89 ± 0.11	Turf	−17.44 ± 0.48	4.59 ± 0.64
			Udotea	−11.62 ± 1.34	2.42 ± 1.12	Turf*	−21.98 ± 0.10	0.41 ± 0.01
			Udotea *	−12.65 ± 0.20	2.65 ± 0.77
S. fluitans	−16.03 ± 0.99	−0.53 ± 0.26	S. fluitans	−16.36 ± 0.15	−1.74 ± 0.38	S. fluitans	−16.26 ± 0.17	−2.51 ± 0.52
S. natans	−17.44 ± 0.71	−1.59 ± 0.70	S. natans	−16.82 ± 0.73	−1.49 ± 0.42	S. natans	−17.28 ± 0.81	−1.62 ± 0.55
Sargassum’s associated turf	−18.29 ± 0.51	−1.13 ± 0.05	Sargassum’s associated turf	−15.93 ± 0.79	−0.47 ± 0.07	Sargassum’s associated turf	−16.27 ± 0.63	−0.96 ± 0.01