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タイトル: Effect of Aquaculture on Material Cycles in Otsuchi Bay, Japan
著者: Kishi, Michio J.
Higashi, Nobutaka
Takagi, Minoru
Sekiguchi, Katsushi
Otobe, Hirotaka
Furuya, Ken
Aiki, Tomokazu
キーワード: aguaculture
numerical model
oyster
scallop
発行日: 2003年3月28日
出版者: Otsuchi Marine Research Center, Ocean Research Institute, the University of Tokyo
掲載誌情報: Otsuchi Marine Science. No.28, 2003.3, pp. 65-71
抄録: A numerical physical-biological coupled model is developed for the study of coastal material cycles including aquaculture. The model calculates spatial distributions of PON (Particulate Organic Nitrogen), POP (Particulate Organic Phosphorus), DON (Dissolved Organic Nitrogen), DOP (Dissolved Organic Phosphorus), Chl-a, zooplankton, NO_3-N, NH_4-N and PO_4-P using simulated current. It also takes into consideration the effects of shellfish feeding and excretion, seaweed photosynthesis, and the loading of DIN from rivers. The model is applied to Otsuchi Bay, in Iwate Pref., in Japan. The model elucidated the cycling of nitrogen among ecological compartments. If the amount of cultured shellfish is extremely increased, the feeding by shellfish is large enough to change the lower trophic level ecosystem, reducing concentration of phytoplankton and POM (Particulate Organic Matter) around the cultured region, while phytoplankton increases far from the culture due to the increase of recycled nutrient by the excretion of shellfish.
URI: http://hdl.handle.net/2261/5571
ISSN: 13448420
出現カテゴリ:Otsuchi Marine Science
Otsuchi Marine Science

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