平面光极的制备及水母消亡对沉积物-海水界面溶解氧影响的模拟观测  

Development of the Planar Optode for Dissolved Oxygen Measurement for Simulated Jellyfish Decomposition Around Sediment-Water Interface

作　　者：姜子可 于新生[1,2] 李栋[1] 阎子衿 张宇[1] 

机构地区：[1]中国海洋大学海洋地球科学学院,山东青岛266100 [2]中国海洋大学海底科学与探测技术教育部重点实验室,山东青岛266100

出　　处：《中国海洋大学学报（自然科学版）》2015年第2期80-87,共8页Periodical of Ocean University of China

基　　金：国家自然科学基金项目(41176089;41176078);国家重点基础研究发展计划项目(2013CB429704)资助

摘　　要：制备了基于八乙基卟啉铂和香豆素的光强比率测量传感膜,结合3CCD相机构建了基于比率测量法的两维溶解氧观测系统,通过实验验证了该系统在沉积物-水界面微结构的溶解氧的时空动态变化监测的可行性.基于实验室模拟观测装置对海蜇消亡过程中沉积物-海水溶解氧的变化特征进行了观测.观测结果表明在置入水母组织的第16h后,水母分解使得沉积物-水界面的溶解氧开始下降,在2～3 d内会导致沉积物-水界面空间的海水溶解氧发生剧烈变化,在沉积物-海水界面附近海水形成严重缺氧区.第1天内,沉积物-海水界面的溶解氧消耗速率为0.2 mg·L^-1·h^-1,第2天溶解氧的消耗速率为0.04 mg·L^-1·h^-1.在近海底的水体空间内,第1天的溶解氧消耗速率为0.28 mg·L^-1·h^-1,第2天为0.14mg·L^-1·h^-1,第3天为0.13 mg·Lv-1·h^-1,表明水母消亡过程中的溶解氧消耗呈动态分布.实验证明水母在消亡过程中的3～4 d内可在沉积物-海水界面附近形成一个贫氧区,水母消亡过程改变了海底区域的溶解氧分布体系,将对海底生态环境产生较大影响.The method of preparation of membrane based on platinum octaethylporphyrin and coumarin intensity ratio measurement is presented and a ratio observing spatial systems with resolution of up to 0. 52 mm by use of 3CCD camera is bulled. The experiments verity the teasibility of monitoring the spa- tial dynamic changes of discolved oxygen in the microstructure of sediment-water interface. Observations using laboratory simulation methods is carried out to study the variation of dissolved oxygen in the sediment - seawater system in the process of jellyfish decomposition. The results show that the decomposition of jellyfish can cause significant reduction in the concentration of dissolved oxygen of the water after 16-hours by placeing the jellyfish tissue in the tank. It will cause dramatic changes of dissolved oxygen in seawater around the sediment-water interface space in 2-3 days, forming severe hypoxia zone in seawater around the sediment-water interface. In the first day, the consumption rate of dissolved oxygen in the sedi- ment water interface is 0. 15 mg · L^-1 · h^-1 , the second day, the rate is 0.04 mg · L^-1 · h^-1. In the first day, the consumption rate of dissolved oxygen at the bottom of the water space is 0. 28 mg · L^-1 · h^-1, the second day,the rate is 0.14 mg · L^-1 · h^-1 ,the third day ,the rate is 0. 13 mg · L^-1 · h^-1 ,it indicates that the consumption of the dissolved oxygen in different regions is a dynamic distribution. Experiments prove that the icilyfish in the decomposition of 3-4 days at the sediment water interface formed severe hypoxia zone in seawater around the sediment-water interface, the hypoxia zone will have a greater impact on the marine environment.

关 键 词：溶解氧 平面光极 海蜇消亡过程 沉积物-海水界面 

分 类 号：P716.5[天文地球—海洋科学]