2011年9月于大亚湾南澳东山码头附近海域设置生态围隔，通过人为对围隔水体中N、P营养元素的加富试验，进一步分析营养盐添加对浮游细菌的丰度影响。结果表明：营养盐添加能促进生态围隔中浮游细菌丰度的增加；并且N、P同时添加于围隔中的效果要比单独添加的效果好，即能更快促进浮游细菌对营养盐的吸收和利用；浮游细菌对氨氮的吸收利用效率最高，其次是硝酸盐；N、P营养盐的添加影响生态围隔中叶绿素a以及溶解氧浓度的变化，从而间接影响浮游细菌的丰度。%A ten-day mesocosm experiment was carried out in Nan’ao of Daya Bay in September of 2011. In total, seven mesocosms (M0~M6) were operated in the study by adding different combinations of N and P on the first day only or daily enrichment, in order to assess the biomass and richness of bacterioplankton with nutrient enrichment. The results showed that nutrient enrichment benefited the growth of bacterioplankton. N and P enriched together increased the biomass of bacterioplankton more efficiently than N and P enriched separately. Bacterioplankton was more eager to uptake ammonium than nitrate as N source. Concentration of chlorophyll a has changed due to nutrient enrichment , which resulted in the changes of bacterioplankton growth.
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