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Death by dissolution : sediment saturation state as a mortality factor for juvenile bivalves

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  • We show that death by dissolution is an important size-dependent mortality Utilizing a new experimental design, we were able to replicate saturation states frequently encountered by Mercenaria mercenaria in coastal deposits mercenaria were reared in sediments at Ωaragonite = 0.4 and 0.6, significant occurred (14.0% and 14.4% d⁻¹, respectively), relative to supersaturated-control mm M. mercenaria, significant mortality occurred under the most mortality = 9.6% d⁻¹), although mortality at Ωaragonite = 0.6 was not significant (mortality = 2.7% d⁻¹; control-saturated mortality = 0.2% d⁻¹). For the largest size- clams under the most undersaturated sediments (Ωaragonite = 0.4, 2.8% d⁻¹). To increase survivorship of juvenile bivalves during periods of recruitment, we saturation state by adding crushed Mya arenaria shell to a mud flat in West Bath, increased the average sediment saturation state within retrieved cores from Ω = numbers of live M. arenaria in buffered sediment increased almost three-fold in the metabolic acids that cause lowered saturation states may represent a strategy to decrease dissolution mortality.
  • Keywords: Sediment saturation state, Dissolution, Mortality factors, Juvenile bivalves
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  • Green, M. A., Waldbusser, G. G., Reilly, S. L., Emerson, K., & O'Donnell, S. (2009). Death by dissolution: Sediment saturation state as a mortality factor for juvenile bivalves. Limnology and Oceanography, 54(4), 1037-1047. Retrieved November 30, 2010, from http://www.aslo.org/lo/toc/vol_54/issue_4/1037.pdf
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  • 54
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  • 4
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