{"refrec":{"BRefID":30450,"RR":"<b>Heijs, S.K.; Azzoni, R.; Girodani, G.; Jonkers, H.M.; Nizzoli, D.; Viaroli, P.; van Gemerden, H.</b> (2000). Sulfide-induced release of phosphate from sediments of coastal lagoons and the possible relation to the disappearance of <i>Ruppia</i> sp. <i>Aquat. Microb. Ecol. 23(1)</i>: 85-95. <a href=\"https://dx.doi.org/10.3354/ame023085\" target=\"_blank\">https://dx.doi.org/10.3354/ame023085</a>","BEntID":30450,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":0,"RefStringPartII":" <i>Aquat. Microb. 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Sediment iron data suggested a moderate chemical buffering capacity towards free sulfide; however, the <i>in situ</i> buffering capacity was fully exploited. Stirring increased the chemical buffer, indicating that, <i>in situ</i>, part of the iron did not contribute to the chemical buffer. The potential rate of biological sulfide oxidation, estimated in sediment slurries amended with oxygen, was high; however, the actual rate was low due to a shortage of oxygen in the sediments and the overlying water. Evidence was obtained for enhanced release of phosphate caused by free sulfide. Under simulated natural conditions the release of phosphate exceeded the initial concentration of Fe-bound phosphate by an order of magnitude, indicating a significant contribution of non-iron-bound phosphate. 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