Changes in the composition of phosphorus (P) compound groups in sediment and P in sediment pore water in a shallow eutrophic lake: a 31P NMR study-猫眼课题宝

DOI：

10.1007/s10201-016-0497-4

发表时间：

2016

期刊：

Limnology

影响因子：

1.6

通讯作者：

中科院分区：

环境科学与生态学4区

文献类型：

作者：

R. Shinohara;A. Imai;N. Kawasaki;Kazuhiro Komatsu;A. Kohzu;S. Miura;T. Sano;Takayuki Satou;N. Tomioka;Koichi Shimotori

我们观察磷（P）化合物组在霞浦湖沉积物在冬季（2月和3月）和夏季（7月和8月），以确定其组成如何在季节之间的差异。沉积物孔隙水中可溶性非反应性磷浓度（SUPpore）冬季显著高于夏季，而可溶性反应性磷浓度（SRPpore）夏季显著高于冬季。在夏季，当SRPs孔浓度较高时，磷化合物组中正磷酸盐浓度最高（约80%）.正磷酸二酯的浓度与SUPpore浓度呈显著负相关，冬季（高SUPpore浓度）显著低于夏季。沉积物中磷化合物的相对丰度可能是由于夏季正磷酸盐的吸附和冬季正磷酸二酯的降解造成的;这些季节性过程可能对SRPpore和SUPpore浓度的变化有重要贡献，可能影响霞浦湖水体中的磷浓度。

We observed phosphorus (P) compound groups in sediment in Lake Kasumigaura in winter (February and March) and summer (July and August) to identify how their composition differs between the seasons. The concentration of soluble unreactive P in sediment pore water (SUPpore) was significantly higher in winter than in summer, whereas the concentration of soluble reactive P (SRPpore) was significantly higher in summer than in winter. In summer, when the concentration of SRPporewas high, the concentration of orthophosphate was greatest (~80 %) among the P compound groups. The concentration of orthophosphate diesters had a significant negative correlation with SUPporeconcentration and was significantly lower in winter (high SUPporeconcentration) than in summer. Such relative abundance of P compound groups in sediment could have resulted from adsorption of orthophosphate in summer and degradation of orthophosphate diesters in winter; these seasonal processes could contribute significantly to the changes in the concentrations of SRPporeand SUPpore, possibly influencing the P concentrations in the water column in Lake Kasumigaura.

Changes in the composition of phosphorus (P) compound groups in sediment and P in sediment pore water in a shallow eutrophic lake: a 31P NMR study

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