【摘要】 本研究采用现场定量观测为主的研究方法,在2017年5月期间对苏北浅滩竹根沙收紫菜养殖筏架作业过程进行跟踪调查;对养殖筏架绠绳附生绿藻自然脱落和收筏架作业过程人为刮落附生绿藻,以及收筏架作业前后入海的漂浮绿藻生物量进行定量观测。结果表明:筏架绳附生绿藻自然脱落率低,为3.58%±0.78%;收筏架作业过程中绠绳上刮落绿藻生物量为(12±3)kg湿重/根,由此估算2017年整个苏北浅滩刮落的生物量估算可达到万吨湿重;收筏架作业后海域漂浮绿藻生物量是作业前的7.6倍。研究结果进一步明确了收筏架作业过程中人为刮落绿藻是目前筏架附生绿藻最主要的入海方式。刮落绿藻是海水中漂浮绿藻的主要来源,其生物量对南黄海绿潮的规模大小有重要的影响。研究结果为绿潮防控措施的制定和实施提供科学依据。更多还原

【Abstract】 We analyzed the different approaches of green algae attached on Porphyra yezoensis aquaculture rafts into seawater via natural falling off and artificial cleanup during aquaculture facility withdrawal in the Zhugensha Sandbank, Subei Shoal, the Yellow Sea, in May 2017, and the causative relation to on green algae bloom occurrence. Floating green algae were sampled before and after the withdrawal. We found the biomass of the floating green algae after raft withdrawal was 7.6 times more than that before the withdrawal. And only 3.58%±0.78% of the attached algae could fall off from the rafts naturally, while the artificial cleanup was(12±3)kg(wet weight)/rope, based on which the total biomass of the field could amount to 10000 t(wet weight) in the shoal area by estimate. Therefore, the green algae detached from the culture devices into seawater by artificial cleanup as the "seed" resulted in later floating green algae bloom in the Yellow Sea. These results shall be insightful to the monitoring and preventing of green tides in the Yellow Sea.更多还原