College of Chemistry and Environmental Science, Guangdong Ocean University, Guangdong, Zhanjiang 524088, China.
College of Chemistry and Environmental Science, Guangdong Ocean University, Guangdong, Zhanjiang 524088, China.
Mar Pollut Bull. 2024 Sep;206:116773. doi: 10.1016/j.marpolbul.2024.116773. Epub 2024 Jul 30.
Phosphorus (P) is a vital nutrient for the growth of marine organisms. Tidal cycle had major influence on various biogeochemical parameters of the bay and changed nutrients input with the ebb and flow of the tide. Seawater was collected by synchronous continuous observation during summer in 2021, to investigate tide drives total phosphorus (TP) variation on the concentration, speciation and exchange flux between Shuidong Bay (SDB) and South China Sea (SCS). Results indicated that there was significant tidal variation in exchange flux of TP between SDB and SCS. DIP and DOP were the main speciation of TDP in different tidal periods, accounting for 53.9 % and 46.1 %TP flowed from SCS to SDB, and monthly exchange flux was about 21.26 t. This study provides new insights in P tidal cycling across the semi-enclosed bay-coastal water continuum, which was implications for understanding P biogeochemical process and primary production dynamics in coastal water.
磷（P）是海洋生物生长的重要营养物质。潮周期对海湾的各种生物地球化学参数有重大影响，并随着潮汐的涨落改变营养物质的输入。2021 年夏季，通过同步连续观测采集海水，研究了潮流对水东湾（SDB）和南海（SCS）总磷（TP）浓度、形态和交换通量变化的驱动作用。结果表明，SDB 和 SCS 之间 TP 的交换通量存在显著的潮汐变化。在不同的潮汐时期，DIP 和 DOP 是 TDP 的主要形态，占从 SCS 流向 SDB 的 TP 的 53.9%和 46.1%，每月交换通量约为 21.26 吨。本研究为了解半封闭湾-沿海水连续体的磷潮汐循环提供了新的见解，这对于理解沿海水的磷生物地球化学过程和初级生产力动态具有重要意义。
