| ZHENG Xinqing,WANG Chenying,HADI Tri Aryono,YE Youyin,PAN Ke. 2018. An ocean acidification-simulated system and its application in coral physiological studies. Acta Oceanologica Sinica, 37(12):55－62 |
| An ocean acidification-simulated system and its application in coral physiological studies |
| 海洋酸化模拟控制系统及其在珊瑚生理研究中的应用 |
| Received:June 15, 2017 |
| DOI：10.1007/s13131-018-1223-3 |
| Key words:ocean acidification OASys coral Galaxea fascicularis |
| 中文关键词: 海洋酸化 酸化模拟控制系统 珊瑚 丛生盔形珊瑚 |
| 基金项目:The China-ASEAN Maritime Cooperation Fund Project "China-ASEAN Countries Collaboration on Marine Endangered Species Researches" and "China-ASEAN Marine Protected Areas Ecosystem Management Network", Regional Demonstration of Marine Economy Innovative Development Project under contract No. 16PZY002SF18; the China-Indonesia Maritime Cooperation Fund Project "China-Indonesia Bitung Ecological Station Establishment"; the National Natural Science Foundation of China under contract No. 41506123. |
| Author Name | Affiliation | E-mail | | ZHENG Xinqing | Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China | zhengxinqing@tio.org.cn | | WANG Chenying | Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China | | | HADI Tri Aryono | Research Center for Oceanography, Indonesian Institute of Sciences, Jakarta 14430, Indonesia | | | YE Youyin | Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China | | | PAN Ke | Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China | panke@szu.edu.cn |
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| Abstract: |
| Due to the elevated atmospheric carbon dioxide, ocean acidification (OA) has recently emerged as a research theme in marine biology due to an expected deleterious effect of altered seawater chemistry on calcification. A system simulating future OA scenario is crucial for OA-related studies. Here, we designed an OA-simulated system (OASys) with three solenoid-controlled CO2 gas channels. The OASys can adjust the pH of the seawater by bubbling CO2 gas into seawaters via feedback systems. The OASys is very simple in structure with an integrated design and is new-user friendly with the instruction. Moreover, the OASys can monitor and record real-time pH values and can maintain pH levels within 0.02 pH unit. In a 15-d experiment, the OASys was applied to simulate OA in which the expected target pH values were 8.00, 7.80 and 7.60 to study the calcifying response of Galaxea fascicularis. The results showed daily mean seawater pH values held at pH 8.00±0.01, 7.80±0.01 and 7.61±0.01 over 15 d. Correspondingly, the coral calcification of G. fascicularis gradually decreased with reduced pH. |
| 中文摘要: |
| 大气CO2分压的持续升高，导致海洋吸收CO2的量不断增加，海水pH值下降，这种由大气CO2分压升高导致的海水酸度增加的过程称为海洋酸化。海洋酸化研究一个重要的研究领域是酸化模拟实验生理生态学研究，即在可控的实验条件下探索或研究升高的CO2，降低的pH或海水碳酸盐化学的变化对海洋生物的影响，其核心要素之一就是模拟未来海洋酸化场景的实验系统。早期由于技术以及条件的限制，早期酸化生理、生态研究主要通过往实验水体添加酸（HCl）、碱（NaOH/Na2CO3/NaHCO3）来实现的。本项目设计一个海洋酸化模拟控制系统，该系统具备自我反馈系统，通过监测实验海水pH的变化，调节CO2气体的输入，实时监测和调整实验水体的碳酸盐化学体系，实验海水pH波动不到0.02pH；同时，该系统是一个高度集成的系统，所有关键部件集成于控制盒中，使得系统看起来简洁且操作方便。为了进一步验证该系统的有效性，我们利用该系统研究酸化（pH设置分别是8.00，7.80以及7.60）对丛生盔形珊瑚Galaxea fascicularis钙化生长的影响。结果显示，15天内，三个缸的pH非常稳定，其每日平均值（144个数据取平均）分别为7.60±0.01（tank1），7.81±0.01（tank2）和8.01±0.01（tank3），与系统初始设定值保持很好的一致性。盔形珊瑚的钙化率随着pH下降而逐渐降低。 |
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