Seasonal Variation and Driving Factors of Phytoplankton Primary Production in Xiangxi Bay Based on High Frequency Dissolved Oxygen Instrument [基于高频溶氧的浮游植物初级生产力季节变化及驱动因子-以神农南坡香溪河库湾为例]

作者：Zhu Y.-F.; Tan L.; Cai Q.-H.; Ye L.^*

来源：Resources and Environment in the Yangtze Basin, 2021, 30(6): 1472-1479.

DOI：10.11870/cjlyzyyhj202106021

• Generalized linear model
• Gross primary production
• Large reservoir
• Net primary production
• Phytoplankton
• Respiration

From July 2017 to June 2018, the primary production of phytoplankton in Xiangxi Bay was estimated by the method of directly obtaining the dissolved oxygen value of water body with high frequency dissolved oxygen meter. The seasonal variation of phytoplankton primary production and its driving factors in Xiangxi Bay were discussed. The results show that the trends of the values of primary production(GPP, NPP, R) are the same in the four seasons of a year, which are the highest in summer, the second in spring, the lowest in autumn and the last in winter, GPP, NPP, R have significant differences between the four seasons (Mann Whitney u test, P < 0.001). GPP ranged from 0.04 to 24.28 mg O2 L-1 d-1; NPP ranged from -3.78 to 4.92 mg O2 L-1 d-1; and R ranged from 0.01 to 16.87 mg O2 L-1 d-1. The results of the generalized linear model show that there is a positive correlation between chlorophyll a (Chl a), total nitrogen (TN) and gross primary production (GPP), but a negative correlation between soluble silicon (DSI) and gross primary production (GPP); a positive correlation between chlorophyll a (Chl a), water temperature (WT) and respiratory consumption (R), and a negative correlation between soluble silicon (DSI) and respiratory consumption (R); we found no significant correlation with NPP.

• 单位
  淡水生态与生物技术国家重点实验室; 中国科学院大学