ENVIRONMENTAL EVALUATION OF OYSTER REEF ECOSYSTEM IN SANBANZE SHALLOWS OF TOKYO BAY

• AZUMA Masashi

  前横浜国立大学大学院 工学府社会空間システム学専攻

• SASAKI Jun

  横浜国立大学 大学院工学研究院

Bibliographic Information

Other Title

• 東京湾三番瀬におけるカキ礁生態系の環境機能評価

Abstract

Field investigations and indoor experiments were performed to evaluate the environmental function of the oyster reef existing around the Nekozane River mouth in Sanbanze Shallows of Tokyo Bay in terms of the decomposition rate of organic matter. The number of living oysters and oystershells was counted to estimate their densities in the reef. Sediment samples were collected and analyzed to understand spatial variation in sediment properties around the reef. Indoor experiments were conducted to determine the oxygen consumption rates of oysters and oystershells in terms of water temperature. All of the information are integrated on GIS and the spatial variation in decomposition rate of organic matter inside and outside of the oyster reef. Very high organic matter decomposition rate of the oyster reef was obtained during summer, which is comparable to several times of that of sandy bed in Sanbanze Shallows. According to the historical aerial photos, the oyster reef remains for more than 10 years. These results show that the oyster reef has valuable and sustainable function of water purification.

Journal

• PROCEEDINGS OF CIVIL ENGINEERING IN THE OCEAN

  PROCEEDINGS OF CIVIL ENGINEERING IN THE OCEAN 24 801-806, 2008

  Japan Society of Civil Engineers

Keywords

• Oxygen consumption rate
• decomposition of organic matter
• GIS
• oystershell

Details

• CRID: 1390001205204137088
• NII Article ID: 130003950917
• DOI: 10.2208/prooe.24.801
• ISSN: 18848265
• ISSN: 09127348
• Text Lang: ja
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed