The Research on effects for bog ecosystem of loading of nutrient from Water shed of the bog

2000 Fiscal Year Final Research Report Summary

• Project/Area Number: 10680531
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: 環境影響評価(含放射線生物学)
• Research Institution: National Institute for Environmental Studies
• Principal Investigator: NOHARA Seiichi National Institute for Environmental Studies, Environmental Biology Division, Chief, 生物圏環境部, 室長 (60180767)
• Project Period (FY): 1998 – 2000
• Keywords: δ^<18> O value / boat / nitrogen / total inorganic carbon (TIC) / dissolution organic carbon (DOC) / 富栄養化

Research Abstract

There was lake water pH of Ozenuma within 6.7〜8.2 neutrality. There was tile bog in the acidity, and 7 rivers were acid rivers in the profit. And, it is necessary that the water temperature of 5 rivers investigates the difference between the basin in the low comparison otherwise well-informed. The dissolution organic carbon (DOC) of three rivers in Azami bog is high. The concentration of the dissolution organic substance is low largest inflow river Oe river. The inflow of the DOC from the Oe bog seems to be little. About 1%o heavily since it has the δ^<18>O value of the river water which derives from the bog as well as it further than other river, the water in which peat layer is old a little seems to have been mixed with the river water. And, the nitric acid concentration in fiver water of bog is low. It seemed to take in the nitrogen in the bog. It is higher than the lake water river water nitric acid concentration. The nitrogen load from the nature in the basin seems to support the nitrogen of Lake Ozenuma. It is necessary to clarify the factor of the eutrophication of Ozenuma.