摘要
本实验调查了武汉东湖浮游植物水华的各种成份以及水柱沉淀物内叶绿素α含量,根据碳与叶绿素α关系,给定了一回归方程,并计算出沉淀物中藻类活体相应的碳、氮、磷含量。从平均数值看,武汉东湖浮游植物水华的C,N,P含量分别为39.30,7.98及0.94(％);其干湿比为0.20,碳、氮比为5.10,碳、磷比为46.54,碳与叶绿素α之比则为133.32。 1983年东湖水柱沉淀物中浮游植物活体叶绿素α下沉量平均每天每平方米为43.8675微克(Ⅰ站)及35.5881微克(Ⅱ站)。利用东湖浮游植物水华各种成份含量及其各种比率计算出的东湖水柱沉淀物中浮游植物活体碳、氮、磷量,按顺序每天每平方米分别为2.53,0.50,0.05毫克(Ⅰ站)及2.09,0.41,0.04毫克(Ⅱ站)。
Some constituents of the algal blooms and the amount of chlorohpyll α in the sediments of Lake Donghu, Wuhan are investigated. On the basis of the components of the blooms, the contents of C, N, and P in the living algae sunk to the sediments are calculated. A regression is constructed to describe the relationship of carbon-chl α.The average percentage of C, N, and P of the blooms in Lake Donghu, Wuhan is 39.30, 7.98, and 0.94, respectively. The ratios of different components are listed. The dry wt./wet wt. ratio is 0.20, the C/N ratio, 5.10, the C/P ratio, 46.54, and the C/chl α, 133.32.In 1983, the amounts of chl α sunk from the sestom algae to the bottom of the Lake were 43.8675 (Station Ⅰ), and 35.5881 (Station Ⅱ) μg·m^(-2)·day^(-1) in average. The contents of C, N, and P of the living algae in the sediments, calculated by using the regression of carbon-chl α and the ratios of different components, were estimated at 2.53, 0.50, and 0.05 mg·m^(-2)·day^(-1), respectively (Station Ⅰ), and 2.09, 0.41, and 0.04 mg·m^(-2)·day^(-1) (Station Ⅱ).By the method giv.en in this study, the amount of living algal material in the sediment can be discriminated from that of the detritus contained in the same sediment.
