Daily changes of uptake of inorganic carbon and nitrogen, and their relation to phytoplankton blooms in late spring-early summer in Lake Nakanuma, Japan
✍ Scribed by Tatsuo Miyazaki; Masanori Watase; Kazuyoshi Miyake
- Publisher
- Springer
- Year
- 1989
- Tongue
- English
- Weight
- 580 KB
- Volume
- 185
- Category
- Article
- ISSN
- 1573-5141
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✦ Synopsis
Daily changes of inorganic carbon and nitrogen uptake were measured in May in 1986 in Lake Nakanuma, Japan . Uptake of inorganic carbon and ammonium in the light-bottle experiments in the 1 m layers, showed daily changes similar to chlorophyll a changes, though the uptake activities peaked before chlorophyll a peaks (phytoplankton blooms) appeared . Potential growth rates of phytoplankton and observed growth rates were calculated from the uptake rates and chlorophyll a changes . The potential growth rates did not always correspond to the observed growth rates . The potential growth rates did not correlate with the loss rates . The correlation between the observed growth rates and the loss rates was better . These results suggest that though the increase of uptake activities may be necessary for occurrence of phytoplankton blooms, loss processes may affect the occurrence of blooms .