Studies on inter-relationships between phytoplankton and zooplankton in patchy distributional manner

浮游植物和浮游动物斑块分布相互关系的研究

• 批准号: 60440016
• 负责人: TANIGUCHI Akira
• 金额: $ 14.02万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (A)
• 财政年份: 1985
• 资助国家: 日本
• 起止时间: 1985 至 1988
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-60440016/
• 关键词: epibenthic plankton; feeding activity of copepods; mixotroph; plankton patch; planktonic ciliates; 混合栄養者; 女川湾; 螢光検鏡; 粒状有機物鉛直輸送; 橈脚類の日周摂食リズム; 絶食による摂食機能の回復; 前線帯; 橈脚類の摂食応答; 糞粒沈降フラックス; プランクトン; パッチ; 摂食生態

The main aims of this project are to figure out the patchy distributions of phytoplankton and zooplankton in nature and then determine the inter-relationships between phytoplankton and zooplankton at different population densities, which may occur in nature depending on the presence or absence of patches. The data obtained can be summarized as below.(1) Many instances of patchy distribution in fine scale of both phyto- and zooplankton in various sea areas were recorded by continuous towings of a Longhurst-Hardy Plankton Recorder and a Scatter-Fluorescence-Temperature-Depth Recorder.(2) Diel rhythms in feeding activity of herbivorous copepods were found in natural populations Magnitudes of the rhythm changing with different feeding/starving regimes was also examined. Then ecological significance of diel vertical migration of copepods, which makes copepods encounter periodically phytoplankton patches in the surface layer, could be speculated.(3) Distributional patterns of phytoplankton and heterotrophic and mixotrophic planktonic ciliates in Onagawa Bay were illustrated. Despite very weak swimming ability of the ciliates, each species seems to keep its specific position in water column which might be controlled by the degree of dependence on phtoplankton as a energy source.

该项目的主要目的是弄清楚自然界中浮游植物和浮游动物的斑块分布，然后确定不同种群密度下浮游植物和浮游动物之间的相互关系，这种关系可能在自然界中发生，具体取决于斑块的存在或不存在。所获得的数据可概括如下：(1)通过Longhurst-Hardy浮游生物记录仪和散射荧光-温度-深度记录仪的连续拖曳，记录了各海域浮游植物和浮游动物细尺度斑片状分布的情况。(2)在自然种群中发现了草食桡足类摄食活动的昼夜节律。 还检查了不同喂养/饥饿方案的节律变化。进而推测桡足类昼夜垂直迁移的生态意义，即桡足类在表层定期遇到浮游植物斑块。(3)阐明了女川湾浮游植物和异养、混养浮游纤毛虫的分布格局。尽管纤毛虫的游泳能力非常弱，但每个物种似乎都保持其在水柱中的特定位置，这可能是由对浮游植物作为能源的依赖程度控制的。

项目成果

Yamamoto,T.: J.Plankton Res.10. 1113-1130 (1988)

Yamamoto,T.：J.Plankton Res.10。

Sasaki, H.; H. Hattori; S. Nishizawa: "Downward flux of particulate organic matter and vertical distribution of calanoid copepods in the Oyashio Water in summer" Deep-Sea Research. 35. 505-515 (1988)

佐佐木，H.；

西澤敏 編: "生物海洋学ー低次食段階論ー" 恒星社厚生閣, 300 (1989)

西泽聪主编：“生物海洋学 - 较低食物水平的理论”，Seiseisha Kosokaku，300（1989）

Taniguchi, A.; T. Yamamoto: "Hetergeneous distribution of plankton community in the frontal areas and its fisheries oceanographical aspects" Suisan Kaiyo Kenkyukai-ho. Special Issue. 273-281 (1988)

谷口，A.；

Hiroshi Sasaki: Deep-Sea Research. 34. (1987)

佐佐木宏：深海研究。