| 珠江干流初级生产力时空变化特征及影响因素 |
| |
| 作者姓名： | 刘二纯 赖子尼 刘乾甫 王超 高原 麦永湛 |
| |
| 作者单位： | 上海海洋大学/水产科学国家级实验教学示范中心;中国水产科学研究院珠江水产研究所;农业农村部珠江流域渔业生态环境监测中心;广东省水产动物免疫技术重点实验室 |
| |
| 基金项目： | 国家重点研发计划“蓝色粮仓科技创新”计划(2018YFD0900802);广西重要江河渔业环境容量调查与评估项目(0302021012);中国水产科学研究院珠江水产研究所基本科研业务费“渔业环境保护与修复创新团队”项目(2020-ZJTD-05)。 |
| |
| 摘 要： | 水体初级生产力是保证水生生物种群再生产速率的一种体现,可为河流生态系统的运转提供能量来源.为探究珠江干流初级生产力(Primary Productivity,PP)状况及水环境影响因子,于2016年3月(平水期)、6月(丰水期)、9月(枯水前期)进行采样调查分析,采用Pearson相关性分析对初级生产力及其与水环境因子...
|
| 关 键 词： | 初级生产力 营养状态指数 珠江干流 叶绿素a |
Temporal and Spatial Variation Characteristics and Influencing Factors of Primary Productivity in the Main Stream of the Pearl River |
| |
| Authors: | LIU Erchun LAI Zini LIU Qianfu WANG Chao GAO Yuan MAI Yongzhan |
| |
| Institution: | (National Demonstration Center for Experimental Fisheries Science Education,Shanghai Ocean University,Shanghai 201306,China;Pearl River Fisheries Research Institute,Chinese Academy of Fishery Sciences,Guangzhou 510380,China;Fishery Ecological Environment Monitoring Center of the Pearl River Basin,Ministry of Agriculture and Rural Affairs,Guangzhou 510380,China;Key Lab of Aquatic Animal Immune Technology in Guangdong Province,Guangzhou 510380,China) |
| |
| Abstract: | The primary productivity of a water body is a reflection for ensuring the reproduction rate of aquatic organism population,which can provide energy source for the operation of river ecosystems.To explore the primary productivity(PP)and water environment impact factors in the main stream of the Pearl River,investigations were carried out in March(normal period),June(wet season),and September(early dry season)of 2016,and the primary productivity and its relationship with water environmental factors were analyzed by Pearson correlation analysis.The results showed that the primary productivity ranged from 6.0 to 866.5 mg·m-2·d-1,with a mean value of 111.1 mg·m-2·d-1.The primary productivity in different periods varied obviously,and the early dry season possessed highest primary productivity,followed by normal period and wet season.The primary productivity of each station presented not obvious difference except for Lubuge station with the abnormally high primary productivity.Moreover,primary productivity was significantly correlated with total nitrogen,nitrite,silicate,chlorophyll a,transparency,etc.(P<0.05,n=42).Through comprehensive evaluation,this water area in 2016 was mainly mesotrophic and oligotrophic,while there were partial“eutrophied”water conditions in the upstream dam reservoir area.The results demonstrated that changes in the hydrological regime of river caused by non-point source pollution and the damming on the main stream of the Pearl River were the main influencing factors leading to the temporal and spatial differences in primary productivity. |
| |
| Keywords: | Primary productivity Nutritional status index main stream of Pearl River chlorophyll a |
| 本文献已被 维普 等数据库收录！ |
|
