胶州湾异养浮游细菌对磷的吸收作用及影响因素研究  

Phosphorus Uptake by Heterotrophic Bacterioplankton and Its Affecting Factors in Jiaozhou Bay

作　　者：白洁[1] 李岿然[1] 张昊飞[1] 刘东艳[1] 刘广山[2] 张经[1] 李佳霖[1] 

机构地区：[1]中国海洋大学,山东青岛266003 [2]厦门大学,福建厦门361005

出　　处：《中国海洋大学学报（自然科学版）》2005年第5期835-838,862,共5页Periodical of Ocean University of China

基　　金：国家自然科学基金重点项目(40036010);山东省环保重点基金(2004040-1);中国海洋大学物理海洋教育部重点实验室开放基金资助

摘　　要：为了解异养浮游细菌在磷的海洋生物地球化学循环和海湾富营养化中的作用,于2003年6月、8月和2004年3月采用现场调查和实验室培养相结合的方法,对胶州湾异养浮游细菌的无机磷酸盐吸收量、周转时间及影响因素进行了研究,结果表明,胶州湾异养浮游细菌对无机磷酸盐的吸收量在春、夏、冬季分别为4.34,2.13,0.89×10-2μg/dm3.h,周转时间分别为39.78,29.29,6.56d,水温和有机质含量是其主要限制因子,胶州湾春季异养浮游细菌与藻类可能存在对无机磷酸盐的吸收竞争。The seasonal variation and affecting factors of phosphorus uptake amount and turnover time of heterotrophic bacterioplankton in Jiaozhou Bay were studied in June, August, 2003 and March, 2004. The results showed that the uptake amounts of inorganic phosphorus in central Jiaozhou Bay in spring, summer and winter were 4.34, 2.13 and 0.89 x 10^-2μg/dm^3·h, respectively, while the turnover time were 39.78, 29.29 and 6.56 days, respectively. Water temperature and organic matter content were the main limiting factors. Total phosphorus uptake amount by heterotrophic bacterioplankton was also studied in March, 2004 at 5 stations in Jiaozhou Bay through isotope tracing techniques. The results showed that the uptake amount exhibited a typical high level in nearshore and low level in offshore feature. The average uptake amount was 0. 064μg P/dm^3·h in winter. The uptake amount was the highest at A1 station （0. 083μg P/dm^3·h） and the lowest at C3 station （0. 027μg P/dm^3·h）. High salinity and low nutrients would decrease the total phosphorus uptake. The uptake ratio of inorganic to total phosphorus in winter was 0.33 in center of Jiaozhou Bay.

关 键 词：胶州湾 营养盐 异养浮游细菌 吸收率 周转时间 

分 类 号：X172[环境科学与工程—环境科学]