| 摘要: |
| 对1998年8月中旬至9月中旬烟台四十里湾发生的大规模赤潮进行调查研究。结果表明,此次赤潮发生面积约为100km2,其原因种为红色裸甲藻Gymnodinium sanguineum,密度高达1560ind/ml,是我国首次记录的由该种生物引起的大规模赤潮。大量衰亡赤潮生物的分解消耗水体的溶解氧,引起下层水体严重缺氧,导致养殖的扇贝大批死亡。赤潮的成因主要是大量陆源有机物、营养盐类的排入和大规模贝类筏式养殖的自身污染,为赤潮生物的暴发性增殖提供丰富的物质基础;适宜的水文气象条件亦为赤潮的发生提供良好的物理环境。 |
| 关键词: 烟台四十里湾 红色裸甲藻 赤潮成因 |
| DOI： |
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| 基金项目:国家自然科学基金重大资助项目，39790110号;国家“九五”科技攻关资助项目，96-922-02-04号;国家重点基础研究规划项目资助，1999012012号 |
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| EVOLUTION AND CAUSES OF FORMATION OF GYMNODINIUM SANGUINEUM BLOOM IN YANTAI SISHILI BAY |
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WU Yu Lin1, ZHOU Cheng Xu1, ZHANG Yong Shan1, PU Xin Ming1, LI Wei Hua2
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1.Institute of Oceanology,The Chinese Academy of Sciences,Qingdao,266071;2.The Central Environmental Monitoring Station of Yantai,Yantai,264000
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| Abstract: |
| From mid-August to mid-September, an HAB event of Gymnodinium sangnineum bloom occurred in the aquaculture area of the Sishili Bay, Yantai. The area of the HAB is about 100km2, and the highest density of Gymnodinium sangnineum reached 1560 cells/ ml. This bloom caused severe economic losses.
The origin of the bloom is attributed to eutrophication, which is caused mainly by land source pollution and shellfish cultivation. The faeces and the pseudo-faeces excreted by scallop Chalmys farreri and attached organisms account to 149800 tons (dry weight) over the area, in which total N is 776 tons. The total N from terrigenous input is about 1910 tons and the total P is 150 tons. High temperature, low turbulence, and intense irradiation offered a suitable physical environment for the bloom. |
| Key words: Yantai Sishili Bay, Gymnodinium sangnineum, Red tide causes |
