2024-03-28T14:38:27Z
https://repository.dl.itc.u-tokyo.ac.jp/oai
oai:repository.dl.itc.u-tokyo.ac.jp:00038792
2022-12-19T04:13:28Z
40:6494:6495:6496
9:504:6497:6498
Effect of Aquaculture on Material Cycles in Otsuchi Bay, Japan
Kishi, Michio J.
137215
Higashi, Nobutaka
137216
Takagi, Minoru
137217
Sekiguchi, Katsushi
137218
Otobe, Hirotaka
137219
Furuya, Ken
137220
Aiki, Tomokazu
137221
452
aguaculture
numerical model
oyster
scallop
application/pdf
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.
departmental bulletin paper
Otsuchi Marine Research Center, Ocean Research Institute, the University of Tokyo
2003-03-28
application/pdf
Otsuchi marine science = 東京大学海洋研究所大槌臨海研究センター研究報告
28
65
71
AA11358599
13448420
https://repository.dl.itc.u-tokyo.ac.jp/record/38792/files/KJ00000046668.pdf
eng