| 摘要: |
| 1997年 6月在渤海的 5个站位采样分析了微型浮游动物的空间分布，用稀释法研究了浮游植物的生长率和微型浮游动物对浮游植物的摄食压力。结果表明，所研究的微型浮游动物主要是砂壳纤毛虫和桡足类幼虫。Codonellopsis spp.是砂壳纤毛虫的绝对优势种，只在1、3、5号站有分布。表层分布为：1号站981ind/L、5号站200 ind/L、3号站30 ind/L；垂直分布为上层多、下层少。桡足类幼虫密度为 0–87ind/L。表层浮游植物的生长率为0.43–0.73d-1，浮游动物的摄食率为0.42–0.69d-1，相当于每天摄食浮游植物现存量的34–49%和初级生产力的85–101%。 |
| 关键词: 渤海 微型浮游动物 摄食压力 砂壳纤毛虫 |
| DOI：10.11693/hyhz200003004004 |
| 分类号: |
| 基金项目:国家自然科学基金“九五”重大项目资助，49790010号 |
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| MICROZOOPLANKTON AND THEIR GRAZING PRESSURE ON PHYTOPLANKTON IN BOHAI SEA |
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ZHANG Wu-chang, WANG Rong
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Institute of Oceanology, The Chinese Academy of Sciences, Qingdao266071
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| Abstract: |
| From June 1 to 15, 1997, “Science I” completed its Bohai Sea cruise, which was part of the China GLOBEC program, titled “Ecosystem dynamics and sustainable utilization of living marine resource in China seas”. Five stations were investigated. Microzooplankton were mainly composed of ciliate and copepod nauplii. Ciliates, among which Codonellopsis spp. was dominating, were distributed at station 1, 3, and 5. The density of ciliates was 0–981ind/L at surface, and no aloricate ciliate was observed. Copepod of microzooplankton is more in surface water than in deep water. Phytoplankton growth rate was 0.43–0.73 day-1. In surface water and 0.22 day-1 in bottom water, phytoplankton was grazed by microzooplankton at a rate of 0.42–0.69 day-1. Microzooplankton grazed 34%–49% of the phytoplankton biomass or 85%–101% of the primary production per day. Based on the small number of tintinnidae and nauplii with high grazing pressure, we conclude that other microzooplankton such as 2–20μm ciliates and heterotrophic flagellates are probably abundant in Bohai Sea. |
| Key words: Bohai Sea, Microzooplankton, Grazing pressure, Tintinnidae |
