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于1986年1月和7月在长江口及其附近海域进行了细菌的落射荧光直接计数和三磷酸腺苷(ATP)浓度的测定,同时取分样进行了微生物呼吸作用耗氧速率和叶绿素浓度的测定。结果表明,细菌数量和ATP浓度夏季较冬季高,总的分布趋势是,高值区出现在内河段和长江口,向外海逐渐降低;细菌数同悬浮体浓度、硝酸盐浓度和耗氧速率呈正相关,与盐度呈负相关。冬季,在整个海域细菌是ATP的主要贡献者和溶解氧的主要消耗者;夏季,沿冲淡水方向ATP出现两个峰值,第一峰值出现在长江口的最大浊度带,由细菌所贡献;第二个出现在盐度25—30的区域,由浮游植物所贡献。呼吸作用耗氧速率也呈现了与ATP相似的分布特征。
In January 1986 and July in the Yangtze River Estuary and its vicinity sea bacteria were directly counted by epifluorescence and adenosine triphosphate (ATP) concentration determination, taking the sample taken microbial respiration rate of oxygen consumption and determination of chlorophyll concentration. The results showed that the bacterial population and the ATP concentration were higher in summer than in winter, and the distribution trend was that the high value area appeared in the inland reach and the Yangtze River estuary and gradually decreased toward the open sea. The bacteria number was positively correlated with the concentration of suspended matter, nitrate concentration and oxygen consumption rate Related, and salinity was negatively correlated. In winter, bacteria were the major contributors to ATP and dissolved oxygen in the whole sea area. In summer, two peaks appeared along ATP in the freshwater. The first peak appeared in the maximum turbidity of the Yangtze River estuary and was contributed by bacteria. The second occurs in areas of salinity 25-30, contributed by phytoplankton. Respiration rate of oxygen consumption also showed similar distribution characteristics with ATP.