抄録
The relationships between the dominant phytoplankton and the factors of water quality were investigated at 28 stations in inland waters.
In large and deep lakes and dams between mountains, total nitrogen (TN), total phosphorus (TP), and TNxTP were low while TN:TP and dissolved inorganic nitrogen (DIN): dissolvedinorganic phosphorus (DIP) ratios were high. However, in small and shallow ponds the former water quality factors were high while the latter factors were low.
Uroglena americana, Fragilaria crotonensis, and Asterionella formosa occurred dominantly in waters with low water temperature (WT), TN×TP, DIP, and TN:DIN ratios and withhigh DIN, TN:TP, DIN:DIP, and TP:DIP ratios. On the other hand, the blue-green algae Microcystis aeruginosa, Microcystis wesenbergii, and Lyngbya contorta occurred in waters with high WT, TN×TP, TN:DIN, and TP:DIP ratios and with low TN:TP and DIN:DIP ratios.
These results suggest that DIN:DIP, TN:DIN, and TP:DIP ratios were closely related with the other factors of water quality, and these factors also restricted the waters where the specific phytoplankton occurred dominantly.
