Long-term variations of three types of phosphorus concentrations in highly eutrophic shallow Lake Kasumigaura, with special reference to dissolved organic phosphorus.
スポンサーリンク
概要
- 論文の詳細を見る
Seasonal variations of particulate-phosphorus (PP), dissolved organic phosphorus (DOP), and dissolved reactive phosphorus (RP) concentrations at ten stations in highly eutrophic shallow Lake Kasumigaura were monthly or biweekly monitored during May 1977 to March 1987. Marked increases in total phosphorus concentration at all stations were directly related to the increases in the standing crop of phytoplankton by the blooming of blue- green algae in summer. Under the heavy blooming of the blue-green algae, a clear peak in RP concentration appeared at all stations every summer after 1981. The RP concentrations were 10-20μg·<I>l</I><SUP>-1</SUP> at lake center and 20-120μg·<I>l</I><SUP>-1</SUP>at the innermost parts of Takahamairi and Tsuchiurairi Bays. The DOP concentrations were nearly constant in the range of 8-25μg·<I>l</I><SUP>-1</SUP> throughout the years. The linear relationship with a constant between DTP and RP concentrations suggested that DOP might be composed of considerably refractory components. <BR>The characterization of the DOP obtained by reverse osmosis, ultra filtration, and freeze-drying and the DOP production experiments using sample incubations with <SUP>32</SUP>P-phosphate suggested that the DOP in the lake water might mainly originate from phytoplankton and cannot be the substrate for at least bacterial alkaline phosphatase.
- 日本陸水学会の論文
日本陸水学会 | 論文
- キイロカワカゲロウの孵化におよぼす水温の影響〔英文〕
- キイロカワカゲロウ羽化の経日・日周変化〔英文〕
- Studies on Taxonomy and Distribution of the Freshwater Snails,Genus,Semisulcospia in the Three Islands inside Lake Biwa
- びわ湖南湖におけるタテヒダカワニナおよびカゴメカワニナの分布とその決定要因について
- ちりとり型金綱による河川底生動物採集上の問題点