A Research for the Quantitative Evaluation of Blue Carbon Function at the Artificial Salt Marsh in the Vicinity of Urban Areas

2016 Fiscal Year Final Research Report

• Project/Area Number: 26340093
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Environmental and ecological symbiosis
• Research Institution: Osaka City University
• Principal Investigator: YAMOCHI Susumu 大阪市立大学, 大学院工学研究科, 名誉教授 (30315973)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: CO2フラックス / 人工塩性湿地 / 地下水位 / 堆積物温度 / 光量子 / クロロフィルa

Outline of Final Research Achievements

Net CO2 absorption and emission on the surface of the sediment was examined at the north salt marsh of Osaka Nanko bird sanctuary. Gross CO2 absorption was closely related to sediment temperature, chlorophyll a and photon flux density, while CO2 emission changed depending on the sediment temperature and groundwater level. The groundwater level was thought to be indispensable for estimating the CO2 emission from the sediment. They were overestimated when groundwater level was not taken into account. The total CO2 absorption or emission of the north salt marsh was estimated as ca.23 tons for absorption and ca.14 tons for emission in May to September, 2014. These results suggest that a net of 9 tons CO2 was absorbed and this salt marsh plays the role of a CO2 sink in the high temperature season of a year.

Free Research Field

環境学