Research Article
Sources and Toxicity of Mercury in the San Francisco Bay Area, Spanning California and Beyond
Table 3
Methylmercury concentrations in representative trophic level II organisms.
| Trophic level II | Methylmercury (MeHg) concentration | Comments | Literature citation |
| Primary Consumers: these are primarily herbivores, filter feeders, small prey fish, etc. | Range: 0.009 to 4.83 ppm | Methylmercury is sequestered in adipose and visceral tissue, and concentrations continue to accumulate in higher trophic levels | [41, 47] | Zooplankton | 0.009 ppm | | [47] | Clams | 0.009 ppm | | [48] | Sardines | 0.013 ppm | | [33] | Cod | 0.111 ppm | | [49] | Small-prey fish | Range: 1.22–4.83 ppm | | [4] |
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