Sixty-one surface sediment samples collected from the Jiangsu Coast (JSC), East China were investigated to explore the influences, provenances and bioavailabilities of P species. Authigenic and detrital P fractions were the dominant species, accounting for 28.53% and 44.04% of the total P content, respectively. Exchangeable, Fe-bound and organic P fractions were biologically available, with an average total of 5.94 μmol/g; this value was governed by grain sizes and the organic matter and carbonate contents. Exchangeable and organic P fractions were transformed between each other, while contributing to the formation of Fe-bound and authigenic P. Phosphorus in the JSC sediments originated mainly from the Yellow River. The unique distribution pattern of P species in the JSC depends on P sources and local environments. These findings improve our understanding of the P cycle and eutrophication in the Jiangsu Coastal Zone.

研究了从华东江苏沿岸收集的61个地表沉积物样本，以探讨P物种的影响，来源和生物利用度。自发性和碎屑性P组分占主导地位，分别占总P含量的28.53％和44.04％。可交换的，铁结合的和有机的P馏分是生物可利用的，平均总量为5.94μmol/ g；该值取决于晶粒大小，有机物和碳酸盐含量。可交换的有机磷和有机磷之间相互转化，同时有助于形成铁结合的和自生的磷。JSC沉积物中的磷主要来自黄河。JSC中P物种的独特分布模式取决于P来源和当地环境。