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大型水母沙海蜇暴发的温带贫营养海洋生态系统中细菌和浮游植物的关系
引用本文:曾阳,黄旭光,黄邦钦,米铁柱.大型水母沙海蜇暴发的温带贫营养海洋生态系统中细菌和浮游植物的关系[J].海洋学报(英文版),2016,35(10):107-113.
作者姓名:曾阳  黄旭光  黄邦钦  米铁柱
作者单位:厦门大学滨海湿地生态系统教育部重点实验室;厦门大学福建省海陆界面生态环境重点实验室,厦门大学滨海湿地生态系统教育部重点实验室;厦门大学福建省海陆界面生态环境重点实验室,厦门大学滨海湿地生态系统教育部重点实验室;厦门大学福建省海陆界面生态环境重点实验室,中国海洋大学化学化工学院
基金项目:国家基金委-山东省联合基金项目“海洋生态与环境科学”(U1406403);中央级科研院所基本科研业务费专项资金项目(GY0214G10);海洋公益性行业项目"黄渤海浅海底层生物资源产业生态化开发关键技术研究与示范"(201205023);典型养殖生态系统底栖动物群落结构及其环境影响因子研究(201208)
摘    要:Bacterial abundance, phytoplankton community structure and environmental parameters were investigated to study the relationships between bacteria and phytoplankton during giant jellyfish Nemopilema nomurai blooms in the central Yellow Sea during 2013. N. nomurai appeared in June, increased in August, reached a peak and began to degrade in September 2013. Results showed that phosphate was possible a key nutrient for both phytoplankton and bacteria in June, but it changed to nitrate in August and September. Phytoplankton composition significantly changed that pico-phytoplankton relative biomass significantly increased, whereas other size phytoplankton significantly decreased during jellyfish bloom. In June, a significantly positive correlation was observed between chlorophyll a concentration and bacterial abundance(r=0.67, P0.001, n=34).During jellyfish outbreak in August, there was no significant correlation between phytoplankton and bacteria(r=0.11, P0.05, n=25), but the relationship(r=0.71, P0.001, n=31) was rebuilt with jellyfish degradation in September. In August, small size phytoplankton occupied the mixed layer in offshore stations, while bacteria almost distributed evenly in vertical. Chlorophyll a concentration significantly increased from(0.42±0.056) μg/L in June to(0.74±0.174) μg/L in August, while bacterial abundance just slightly increased. Additionally, the negative net community production indicated that community respiration was not entirely determined by the local primary productivity in August. These results indicated that jellyfish blooms potentially affect coupling of phytoplankton and bacteria in marine ecosystems.

关 键 词:水母暴发  沙海蜇  浮游植物  光合色素  水母溶解有机物  生态影响
收稿时间:2015/9/22 0:00:00
修稿时间:2015/12/24 0:00:00

Relationship between bacteria and phytoplankton during the giant jellyfish Nemopilema nomurai bloom in an oligotrophic temperate marine ecosystem
ZENG Yang,HUANG Xuguang,HUANG Bangqin and MI Tiezhu.Relationship between bacteria and phytoplankton during the giant jellyfish Nemopilema nomurai bloom in an oligotrophic temperate marine ecosystem[J].Acta Oceanologica Sinica,2016,35(10):107-113.
Authors:ZENG Yang  HUANG Xuguang  HUANG Bangqin and MI Tiezhu
Institution:1.Key Laboratory of Coastal and Wetland Ecosystems of Ministry of Education, Xiamen University, Xiamen 361005, China;Fujian Provincial Key Laboratory of Coastal Ecology and Environmental Studies, Xiamen University, Xiamen 361005, China2.College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266003, China
Abstract:Bacterial abundance, phytoplankton community structure and environmental parameters were investigated to study the relationships between bacteria and phytoplankton during giant jellyfish Nemopilema nomurai blooms in the central Yellow Sea during 2013. N. nomurai appeared in June, increased in August, reached a peak and began to degrade in September 2013. Results showed that phosphate was possible a key nutrient for both phytoplankton and bacteria in June, but it changed to nitrate in August and September. Phytoplankton composition significantly changed that pico-phytoplankton relative biomass significantly increased, whereas other size phytoplankton significantly decreased during jellyfish bloom. In June, a significantly positive correlation was observed between chlorophyll a concentration and bacterial abundance (r=0.67, P<0.001, n=34). During jellyfish outbreak in August, there was no significant correlation between phytoplankton and bacteria (r=0.11, P>0.05, n=25), but the relationship (r=0.71, P<0.001, n=31) was rebuilt with jellyfish degradation in September. In August, small size phytoplankton occupied the mixed layer in offshore stations, while bacteria almost distributed evenly in vertical. Chlorophyll a concentration significantly increased from (0.42±0.056) μg/L in June to (0.74±0.174) μg/L in August, while bacterial abundance just slightly increased. Additionally, the negative net community production indicated that community respiration was not entirely determined by the local primary productivity in August. These results indicated that jellyfish blooms potentially affect coupling of phytoplankton and bacteria in marine ecosystems.
Keywords:jellyfish bloom  Nemopilema nomurai  phytoplankton  pigments  jellyfish DOM  ecological consequence
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