Cai Shun-Zhi, Li Da-Peng, Tang Xin-Yu, Li Hao-Ran, Zhu Wei, Huang Yong
College of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215011, China.
Huan Jing Ke Xue. 2017 Nov 8;38(11):4607-4614. doi: 10.13227/j.hjkx.201704166.
The distribution of external phosphorus (P) in the overlying water, pore water, and sediment under different disturbances were investigated and the transformation between internal P forms was analyzed. The results show that physical disturbances can promote the migration of external P from the overlying water to the sediment. In addition, the enhancement was even higher due to the bioturbation of the combined disturbances. Noticeably, the improvement of the P migration in the control was lowest, compared with the three disturbances. This may be attributed to the penetration of dissolved oxygen. Meanwhile, the physical disturbance reduced the average content of (dissolved organic phosphorus) DIP in the pore water by 12.13% (a mean of 6d and 10d), compared with the control. However the reduction was less than that associated with the bioturbation (38.63%) and the combined disturbance (50.79%), respectively. These three disturbances may promote the formation of Fe/Al-P and Ca-P. The formation of Fe/Al-P and Ca-P was largest under the physical disturbance. However, the algal-available phosphorus (AAP) is reduced due to the physical disturbance, suggesting that physical disturbance may promote the transformation of AAP to occluded Fe/Al-P or Ca-P.
研究了不同扰动条件下上覆水、孔隙水和沉积物中外部磷（P）的分布情况，并分析了内部磷形态之间的转化。结果表明，物理扰动可促进外部磷从上覆水向沉积物的迁移。此外，由于联合扰动的生物扰动作用，这种促进作用更为显著。值得注意的是，与三种扰动相比，对照中磷迁移的改善程度最低。这可能归因于溶解氧的渗透。同时，与对照相比，物理扰动使孔隙水中（溶解有机磷）DIP的平均含量降低了12.13%（6天和10天的平均值）。然而，这种降低分别小于与生物扰动（38.63%）和联合扰动（50.79%）相关的降低幅度。这三种扰动可能促进Fe/Al-P和Ca-P的形成。在物理扰动下，Fe/Al-P和Ca-P的形成量最大。然而，由于物理扰动，藻类可利用磷（AAP）减少，这表明物理扰动可能促进AAP向难溶性Fe/Al-P或Ca-P的转化。
