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| Fast Measurement of Primary Productivity in the Yellow Sea and Bohai Sea Based on Fluorescence Kinetics Technology |
| WANG Xiang1, 2, YIN Gao-fang1*, ZHAO Nan-jing1, GAN Ting-ting1, YANG Rui-fang1, QIN Zhi-song3, DONG Ming1, 2, CHEN Min1, 2, DING Zhi-chao1, 2, QI Pei-long1, 2, WANG Lu1, 2, MA Ming-jun1, 2, MENG De-shuo1, LIU Jian-guo1 |
1. Key Laboratory of Environment Optics and Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China
2. University of Science and Technology of China, Hefei 230026, China
3. Institute of Computer and Information Security, Guilin University of Electronic Technology, Guilin 541004, China |
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Abstract As an important -starting point in the marine ecosystem, phytoplankton primary production is the foundation of the marine food web and an important indicator for seawater quality. In this paper, in order to accurately measure, monitor, and predict spatiotemporal variations of phytoplankton primary productivity, and its kinetic response to external environmental conditions, a measurement technology based on chlorophyll fluorescence kinetics was studied, and a fast measuring instrument with a response time of 1.6 minutes and a precision of 4.86% was developed. The correlation coefficient between the measured phytoplankton primary productivity by the developed instrument and the measured photosynthetic oxygen evolution rate by the liquid-phase oxygen electrode was 0.991. The instrument was equipped on the China Marine Surveillance 101 experimental ship for the underway measurement and the vertical profiles measurement of phytoplankton primary productivity in the Yellow Sea and the Bohai Sea. Underway measurement results showed that the phytoplankton primary productivity in Bohai bay is 1.1~1.4 times higher than outside the bay, and vertical profiles measurement results showed a depth-dependent response of phytoplankton primary productivity on each site in the Yellow sea area. Compared with traditional methods, the developed instrument in this paper has the advantages of rapidness, stability, and no need for sample cultivation and can provide an advanced technical method for marine ecological environment assessment.
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Received: 2021-02-08
Accepted: 2021-04-21
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Corresponding Authors:
YIN Gao-fang
E-mail: gfyin@aiofm.ac.cn
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