Microbiochemical Studies on the Oxygen Deficient Layer in Inland Fish-farm Water Regions

内陆养鱼场水域缺氧层的微生物化学研究

• 批准号: 61560241
• 负责人: KAWAI Akira
• 金额: $ 1.34万
• 依托单位: Kinki University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1986
• 资助国家: 日本
• 起止时间: 1986 至 1987
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-61560241/
• 关键词: Fish farm water region; Oxygen deficient layer; Bottom sediment; Plant pigments in bottom sediment; Amino acid and sugar composition; organic acids; 底泥の糖組成; 低泥の有機炭素及び有機窒素; 底層水の低酸素化; 底泥中の糖組成; 底泥中の有機炭素及び有機窒素

One of the most undesirable environmental conditions infish-culturing inland Bays might be the formation of oxygen deficient layer in bottom water in summer saeason.Toward an aid of the solution of the problem,wetried to elucidate the mechanism of organic polution of bottom sediment in fish-farm inland bays,comparin with that in usual eutrophicated water regions. From the vertical distributions of plant pigments,organic carbon and nitrogen,organic acids,aminoacid and sugar composition of organic substances in the bottom sediment,etc.in the two kinds of organic poluted water regions,the following inference can be drawn from the results obtained in this study.Namely,even though the sea bottom of fish-culturing inland bays are subjected to heavy loads of organic suspended matter with high nitrogen content which is derived from remaining bait and fish excretion,organic polution of the bottom sediment in the water region may proceed by th processes 1) sedimentaion of organic suspended matter on the bottom surface 2) decomposition and mineralization in the water-bottom surface layer 3) eutrophication of sea water j) growth of phytoplanktion 5) sedimentation of dead bodies of phytoplanktion 6) organic polution of bottom sediment.

夏季内陆海湾养鱼最不利的环境条件之一可能是夏季底层水体形成缺氧层。为帮助解决这一问题，我们试图阐明鱼类底层沉积物有机污染的机理。 - 内陆海湾养殖，与一般富营养化水域相比。从两类有机污染水域的底泥中植物色素、有机碳、氮、有机酸、有机物质的氨基酸和糖类成分等的垂直分布来看，所得结果可得出以下推论：即，尽管内陆海湾养鱼的海底承受着来自残留饵料和鱼类排泄物的高氮有机悬浮物的重负荷，但海底沉积物的有机污染仍然存在。水域可能会经历以下过程： 1) 有机悬浮物在底面的沉积 2) 水底表层的分解和矿化 3) 海水的富营养化 j) 浮游植物的生长 5) 浮游植物尸体的沉积6）底泥有机污染。

项目成果

EGUCHI, Mitsuru, KITADA, Hideo and KAWAI, Akira: "On the Oligotrophic Bacteria in Inland Water Regions" Nippon Suisan Gakkaisi.

EGUCHI、Mitsuru、KITADA、Hideo 和 KAWAI、Akira：“论内陆水域的寡营养细菌”Nippon Suisan Gakkaisi。

来田秀雄,江口充,河合章: 日本水産学会誌.

Hideo Kurita、Mitsuru Eguchi、Akira Kawai：日本水产科学会杂志。

江口充,来田秀雄,河合章: 日本水産学会誌.

Mitsuru Eguchi、Hideo Kurita、Akira Kawai：日本水产科学学会杂志。