A Rapid Growth of Aulacoseira granulata (Bacillariophyceae) during the Typhoon Season in the South Basin of Lake Biwa
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概要
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Changes in the abundance of phytoplankton and in the concentrations of nutrients and suspended solids (SS) were followed at a sampling station in the southern basin of Lake Biwa during the Biwako Transport Experiment (BITEX'93) from 24 August to 12 September, 1993. SS concentration increased rapidly when typhoon 9313 struck the lake on 4 September. On this occasion, concentrations of dissolved nitrogen and phosphorus increased, probably due to their release from the sediment resuspended by turbulent mixing. Between 3 and 10 September, the whole water column remained homothermal and was well mixed with the Brunt-Väisälä frequency remaining at O sec<SUP>-1</SUP>. The predominant phytoplankton during the BITEX period was Aulacoseira granulata. Chlorophyll concentrations and algal densities started to increase before the passage of the typhoon (3 September). The alga proliferated rapidly to 7 September, and this was complemented by a decrease in nitrogen and phosphorus concentrations.
- 日本陸水学会の論文
日本陸水学会 | 論文
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