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  

Seasonal Variation and Driving Factors of Phytoplankton Primary Production in Xiangxi Bay Based on High Frequency Dissolved Oxygen Instrument

作　　者：朱永锋 谭路[1] 蔡庆华[1] 叶麟[1] ZHU Yong-feng;TAN Lu;CAI Qing-hua;YE Lin(State Key Laboratory of Freshwater Ecology and Biotechnology,Institute of Hydrobiology,Chinese Academy of Sciences,Wuhan 430072,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院水生生物研究所淡水生态与生物技术国家重点实验室,湖北武汉430072 [2]中国科学院大学,北京100049

出　　处：《长江流域资源与环境》2021年第6期1472-1479,共8页Resources and Environment in the Yangtze Basin

基　　金：中国科学院战略先导A类项目(XDA23040500);国家重点研发计划项目(2017YFC0506406);国家自然科学基金项目(31670534)。

摘　　要：2017年7月至2018年6月,利用高频溶氧仪直接获取水体溶解氧数值的方法估算了香溪河浮游植物初级生产力的状况,探讨了香溪河浮游植物初级生产力季节变化及其驱动因子。结果表明:一年四季当中初级生产力(GPP、NPP、R)数值大小趋势均一致,都为夏季最高,春季次之,随之是秋季,最后冬季最低,GPP、NPP、R在四季之间均存在显著差异(Mann-Whitney U检验,P<0.001)。GPP变化范围为0.04-24.28 mg O2L^(-1) d^(-1);NPP变化范围为-3.78-4.92 mg O2L^(-1) d^(-1);R变化范围为0.01-16.87 mg O2L^(-1) d^(-1)。广义线性模型结果表明:叶绿素a(Chl a)、总氮(TN)与总初级生产量(GPP)存在正相关关系,而可溶性硅(DSi)与总初级生产量(GPP)则是负相关关系;叶绿素a(Chl a)、水温(WT)与呼吸消耗量(R)存在正相关关系,而可溶性硅(DSi)与呼吸消耗量(R)则是负相关关系;没有发现与净初级生产量(NPP)显著相关的变量。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 O2L^(-1) d^(-1);NPP ranged from-3.78 to 4.92 mg O2L^(-1) d^(-1);and R ranged from 0.01 to 16.87 mg O2L^(-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.

关 键 词：总初级生产量 净初级生产量 呼吸消耗量 浮游植物 大型水库 广义线性模型 

分 类 号：Q948.8[生物学—植物学]