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Bioavailability of sediment-associated mercury to Hexagenia mayflies in a contaminated floodplain river

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Figure

Fig. 1. Map of the Sudbury River basin showing the areas from which test sediments were taken.
Table 1. Mean (±1 SE) values for selected characteristics of test sediment and test water to which Hexagenia mayflieswere exposed in four bioaccumulation tests.
Table 2. Mean growth of Hexagenia mayflies and mean (±1 SE) �Hg in test sediment and mayflies, MeHg in test water and mayflies, percentage of �Hg present as MeHg, andnet MeHg accumulation in mayflies exposed to sediments from the Sudbury River basin in 21-day bioaccumulation tests.
Fig. 2. Relationship between �Hg concentration in Hexageniamayflies and that in test sediments from all study sites in theSudbury River basin (combined data from all four bio-accumulation tests).
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