@article{oai:soar-ir.repo.nii.ac.jp:00012282,
 author = {YAMAGISHI,  HIROSHI and OKINO,  TOKIO},
 issue = {2},
 journal = {信州大学理学部紀要},
 month = {Mar},
 note = {Vertical distribution of dissolved oxygen and chlorophyll in summer-autumn season were determined in the offshore of Osaka in Lake Suwa. In mid-summer, when whole the surface of the lake was covered with blooming Microcystis, dissolved oxygen in the surface water layer could attain over-saturation to the utmost extent (160%). Late in August the amount of dissolved oxygen markedly decreased less than 90% saturation, in spite of a large amount of Microcystis existed. It might be related to the declining of the photosynthetic activity of the alga. Moreover, if drifting of the upper water containing a great part of Microcystis by wind (Susu-mizu) occurred, serious decrease of dissolved oxygen (less than 50% saturation) was observed. Wind and waves usually were not favorable to increase oxygen into the surface water. In such a situation carps cultured in the floating nets may be exposed to clanger of asphyxia unless a large amount of dissolved oxygen is supplied from surrounding water outside of the nets during the night. There was a relationship between the pH value and the saturation percentage of dissolved oxygen in the water of 0 to 2 m depth., Article, 信州大学理学部紀要 2(2): 139-148(1968)},
 pages = {139--148},
 title = {Dissolved Oxygen, Bloom of Microcystis and Susu-mizu of Summer-autumn Season in Lake Suwa},
 volume = {2},
 year = {1968}
}