The relation between the type of antenna pigments of dominant cyanobacteria and the ambient stratification condition in reservoirs.

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概要

• 論文の詳細を見る

• We found from field observation data in two reservoirs that the hydraulic state affect the type of antenna pigments of dominant cyanobacteria. To clarify the processes of this phenomenon, we analyzed theoretically the effects of hydraulic states on phytoplankton community based on characteristics of absorption by antennna pigments and underwater light regime. By theoretical analysis we found that phycocyanin-rich cyanobacteria (PC-type) favor shallow stable stratification based on the relationship between the absorption characteristics of antenna pigment and red light penetrative ooptical condition. Furthermore, this hypothesis can also explain the growth condition of bloom forming cyanobacteria. This stratification condition can be estimated as the critical buoyancy frequency(N²cr). This hypothesis is verified using field data.

• 信州大学の論文
• 2004-02-28

著者

• Asaeda Takashi

  Department Of Environmental Science & Human Engineering Saitama University

• Furusato Eiichi

  Environmental Hydraulic Institute Ltd.

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