Fig. 1. Schematic diagram of energy flow and electron transport during photosynthesis

Fig. 2. Chlorophyll fluorescence kinetic curve

Fig. 3. The system structure of the developed instrument and its physical photo

Fig. 4. Comparison of photosynthetic electron transport rate and photosynthetic oxygen evolution rate curves of Dunaliella salina under different culture light

Fig. 5. The trajectory of the scientific research ship

Fig. 6. The spatial distribution of phytoplankton primary productivity in the Yellow Sea and the Bohai Sea

Fig. 7. Phytoplankton Primary productivity and chlorophyll concentration in different water layers of 10 sites
(a): Phytoplankton primary productivity; (b): Chlorophyll concentration