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２００ｉｎｄ／ Ｌ、３号站３０ｉｎｄ／ 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 ０．４２－０．６９ ｄ－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％。
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 resources 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 0-981 ind/L at surface, and no aloricate ciliate was observed. Copepod nauplii were found at station 1, 3, 4 and 5 with density of 0-87 ind/L, The vertical distribution 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 Bobal Sea.
出处
《海洋与湖沼》
CAS
CSCD
北大核心
2000年第3期252-258,共7页
Oceanologia Et Limnologia Sinica
基金
国家自然科学基金"九五"重大项目资助!49790010
