Experimental study on the ecological efficiencies of plankton communities

浮游生物群落生态效率实验研究

• 批准号: 07640845
• 负责人: WATANABE Yasunori
• 金额: $ 1.41万
• 依托单位: TOKYO METROPOLITAN UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07640845/
• 关键词: Plankton; Ecological efficiency; Lake environment; 食物連鎖; 転換効率; 微生物; 細菌; 微小鞭毛虫

The present study was conducted to determine the ecological efficiencies of conversion through food chain structure of planktonic organisms in aquatic environments. Most of the microorganisms used in this study were isolated from lake environment and successfully mainteined in culture conditions. This study also revealed effects of ultraviolet radiation on the dissolved organic matter which affect bacterial metabolism in lake ecosystems.1.A method was established for determination of dissolved organic carbon (DOC) in lake water. Vertical profile of DOC in several lakes was elucidated and dicussed with underwater attenuation of ultraviolet radiation.2.Seasonal change of protozoan plankton in a lake was studied and their grazing rate of bacteria, as well as their predatory loss by zooplankton were estimated.3.Several strains of bacteria, protozoa, rotifers, and crustacean plankters were isolated and cultivated successfully.4.This study demonstrated that the ecological efficiency is 40-48% from phytoplankton excreted organic matter to bacterial cellular organic matter in lake water.5.Nitrogen in aquatic anvironment and the related bacterial metabolisms were considered and summarized.

本研究旨在探讨水生浮游生物通过食物链结构转化的生态效率。本研究中使用的大多数微生物都是从湖泊环境中分离出来的，并在培养条件下成功维持。本研究还揭示了紫外线辐射对湖泊生态系统中溶解有机质的影响，从而影响了湖泊生态系统中细菌的代谢。1.建立了测定湖水中溶解有机碳(DOC)的方法。研究了湖水中原生动物浮游生物的季节变化，估算了它们对细菌的捕食率，以及浮游动物对它们的捕食损失。3.成功地分离和培养了细菌、原生动物、轮虫和甲壳类浮游生物。4.本研究表明，从浮游植物分泌有机物到湖泊水中细菌细胞有机质的生态效率为40-48%。5.考虑和总结了水环境中的氮素及其相关的细菌代谢。

项目成果

Watanabe, Y.: "Eutrophication of aquatic environment and nitrogen metabolism" Life Science for Nutrition and Health. 3 (1). 14-20 (1998)

渡边 Y.：“水生环境富营养化与氮代谢”营养与健康生命科学。

Hodoki, Y.and Y.Watanabe: "Attenuation of solar ultraviolet radiation in eutrophic freshwater lakes and ponds" Japanese J.Limnol.59(1). 27-37 (1998)

Hodoki, Y. 和 Y.Watanabe：“富营养化淡水湖泊和池塘中太阳紫外线辐射的衰减”日本 J.Limnol.59(1)。

Watanabe, Y.: "Limiting factors for bacterioplankton production in mesotrophic and hypereutrophic lakes:Estimation by 3H-thymidine incorporation" Japanese J.Limnol.,. 57(2). 107-117 (1996)

Watanabe, Y.：“中营养性和超富营养性湖泊中浮游细菌生产的限制因素：通过 3H-胸苷掺入进行估算”日本 J.Limnol.,。

渡辺泰徳: "Brief history in Limnological studies in Japan" Korean J.of Limnology. 1996(印刷中). (1996)

Yasunori Watanabe：“日本湖沼学研究简史”，韩国湖沼学杂志 1996 年（出版中）。

渡辺 泰徳: "水界の窒素代謝と富栄養化" 栄養と健康のライフサイエンス. 3巻1号. 14-20 (1998)

Yasunori Watanabe：“水生世界的氮代谢和富营养化”《营养与健康生命科学》，第 3 卷，第 1. 14-20 期（1998 年）。