Supporting Information

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Fig. 3. DFA comparing shell chemistry of M. californianus larvae raised in situ at sites in San Diego County. DFA was conducted using only M. californianus larvae and only element ratios that met the F-to-Remove criterion. (A and B) Individual scores of mussel shell chemistry; sites are shown using the same icon, and regions are shown using a color family. Northern coastal region (blues): AL, Agua Hedionda Lagoon; AH, Agua Hedionda; CR, Cardiff Reef; LJDR, La Jolla Dike Rock. Southern coastal region (reds and oranges): SIO, Scripps Institution of Oceanography Pier; PB, Pacific Beach (Crystal) Pier; OB, Ocean Beach Pier; IB, Imperial Beach Pier; SHI, Shelter Island. Outer bay region (green): HI = Harbor Island (San Diego Bay). Inner bay region (pinks): CV, Chula Vista (San Diego Bay); CPMS, Crown Point Mitigation Site (Mission Bay). (C and D) Canonical discriminant functions (standardized by within variances) of used element ratios. The first two DFA scores account for 80.4%, and the third and fourth scores account for 15.7% of the total dispersion in the data. Corresponding DFA classification successes are shown in Table 1.

Fig. 4. DFA comparing shell chemistry of Mytilus spp. larvae raised in situ at sites in San Diego County. DFA was conducted using both M. californianus and M. galloprovincialis larvae and only element ratios that met the F-to-Remove criterion were used, excluding Co/Ca. (A and B) Individual scores of mussel shell chemistry; sites are shown using the same icon, and regions are shown using a color family. Northern coastal region (blues): AL, Agua Hedionda Lagoon; AH, Agua Hedionda; CR, Cardiff Reef; LJDR, La Jolla Dike Rock. Southern coastal region (reds and oranges): SIO, Scripps Institution of Oceanography Pier; PB, Pacific Beach (Crystal) Pier; OB, Ocean Beach Pier; IB, Imperial Beach Pier; SHI, Shelter Island. Outer bay region (green): HI, Harbor Island (San Diego Bay). Inner bay region (pinks): CV, Chula Vista (San Diego Bay); CPMS, Crown Point Mitigation Site (Mission Bay). (C and D) Canonical discriminant functions (standardized by within variances) of used element ratios. The first two DFA scores account for 73.8%, and the third and fourth scores account for 19.1% of the total dispersion in the data. Corresponding DFA classification successes are shown in Table 2.