华东师范大学学报（自然科学版）Issue(1)：1-11,11.DOI:10.3969/j.issn.1000-5641.2011.01.001
大宁河回水区初级生产力的季节变化
Seasonal variation of primary productivity in the Daning River backwater area
摘要
Abstract
Seasonal variation of primary productivity and its causing factors were investigated during the algae bloom period and dry season in the backwater area of the Daning River, a branch of the Three Gorges, China. The results indicate that most of the investigated physico-chemical parameters, including water temperature, DO concentration (saturation), SPC (specific conductivity), pH, TUR (Turbidity), etc. , in the Daning River are significantly different between the algae bloom period and dry season (ANOVA, p＜0.05). The results suggest that primary productivity and chlorophyll-a in algae bloom period are higher than those in the dry season(ANOVA,p＜0.05). The vertical distribution of PG (Gross primary productivity), PN (net production) and Chl-a(chlorophyll-a) were not significantly different. The maximum of chlorophyll-a concentrations were observed at 9 m underwater, and the maximun of PN、 PG were observed from 0 m to 3 m underwater. The results indicate that the Daning River backwaterarea has a high spatial and temporal heterogeneity in the gross primary productivity, net production and chlorophyll-a. The maximun of gross primary productivity, net production and chlorophyll-a were observed from 0 m to 0.8 m underwater. The results suggest that the water temperature and turbidity are key regulatory factors for primary production. The changes of pH, DO concentration (saturation) and SPC may be the results of the change of the phy-toplankton.关键词
初级生产力/浮游植物/三峡水库/白水河Key words
primary productivity/ phytoplankton/ Three Gorges Reservoir/ Baishui River分类
农业科技引用本文复制引用
张佳磊,郑丙辉,黄民生,刘录三,王丽平,吴光应..大宁河回水区初级生产力的季节变化[J].华东师范大学学报（自然科学版）,2011,(1):1-11,11.基金项目
国家国际科技合作计划项目(2007DFA90510) （2007DFA90510）
国家科技重大专项(2009ZX07528-003) （2009ZX07528-003）
