2007
DOI: 10.4319/lo.2007.52.4.1614
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Radium‐226 accumulation in Florida freshwater mussels

Abstract: Selected lakes in Hillsborough County, Florida have been hydrologically augmented with groundwater to offset stage declines caused by excessive pumping of the Floridan Aquifer. Augmentation water can be relatively rich in 226 Ra (.5 decays per minute [dpm] L 21 ). We measured 226 Ra activities in shells and soft tissues of adult bivalve molluscs (Elliptio cf. buckleyi) from groundwater-augmented and nonaugmented lakes to assess bioaccumulation of 226 Ra by mussels. Mussels from augmented lakes displayed higher… Show more

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Cited by 17 publications
(21 citation statements)
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“…Previous studies have noted the long biological half-life of Ra (no soft tissue Ra loss after 286 days) within mussel soft tissue, with one study observing accumulation of 226 Ra positively associated with freshwater mussel age. 25,71 This indicates that Ra bioaccumulates in mussel soft tissue over time with isotopic signatures retained within soft tissue. Thus, Ra requires adequate characterization of baseline conditions to serve as a reliable forensic tool of anthropogenic accumulation if adult mussels are moved from one location to another.…”
Section: ■ Results and Discussionmentioning
confidence: 99%
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“…Previous studies have noted the long biological half-life of Ra (no soft tissue Ra loss after 286 days) within mussel soft tissue, with one study observing accumulation of 226 Ra positively associated with freshwater mussel age. 25,71 This indicates that Ra bioaccumulates in mussel soft tissue over time with isotopic signatures retained within soft tissue. Thus, Ra requires adequate characterization of baseline conditions to serve as a reliable forensic tool of anthropogenic accumulation if adult mussels are moved from one location to another.…”
Section: ■ Results and Discussionmentioning
confidence: 99%
“…76 The Ra incorporated into the phosphate granules accumulates with time and is not expelled from the mussel even if the mussel is moved from higher-Ra activity water to relatively lower-Ra activity water for a period of months and/or years. 25,82,83 Isotopic Signatures ( 226 Ra/ 228 Ra and 87 Sr/ 86 Sr) in Soft Tissue. Like total Ra and 226 Ra soft tissue accumulation, soft tissue 226 Ra/ 228 Ra reflected no statistical differences (p > 0.05) between doses (Figure 4 and Table 1).…”
Section: ■ Results and Discussionmentioning
confidence: 99%
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“…Sampling freshwater mussels, which are sessile, benthic filter-feeders, may be useful to assess water quality and bioaccumulation of environmental pollutants [38][39][40][41] . Environmental contamination is proposed as a factor in the recent decline of many freshwater species [42][43][44] and the concentrations of trace metals (i.e., Cu, Fe, Mn) in mussel tissue are generally correlated to the concentrations in the water that they inhabit [45][46][47] . Importantly, studies on freshwater mussels indicate that the metal to calcium ratio in the water and the solubility of the divalent metal hydrogen phosphate mineral controls the accumulation potential of divalent metals in the soft tissue [48][49][50] .…”
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confidence: 99%
“…Freshwater bivalve shells have been successfully used as temporally resolved archives of water chemistry 14 15 16 17 . Freshwater mussels are common in many streams, and although they have declined due to anthropogenic pressures in the past decades, there are still some cosmopolitan species, such as Elliptio complanata 9 18 , which could be sacrificed as archives of stream chemistry.…”
mentioning
confidence: 99%