Physicochemical Features and Primary Production of Microphytobenthos and Phytoplankton at Wakaura Tidal Flat in Japan.
スポンサーリンク
概要
- 論文の詳細を見る
The photosynthetic rates of phytoplankton and microphytobenthos were measured with a combustion method of <SUP>14</SUP>C in a tidal flat of the Wakaura estuary, Central Japan. In addition, chlorophyll a concentra-tion and a set of environmental factors (water temperature, salinity, nutrient concentrations) in the water and the sediment were measured in order to investigate factors affecting their photosynthetic rates. The chlorophyll a concentration of microphytobenthos (average 20 mg chl a m<SUP>-2</SUP>) was several times as high as that of phytoplankton (average 3.0 mg chl a m-2). The photosynthetic rate of microphytobenthos, which showed a significant positive correlation only with chlorophyll a concentration in the sediment, ranged from 1.1 to 19 mg C m<SUP>-2</SUP> hr<SUP>-1</SUP> (average 8.7 mg C m<SUP>-2</SUP> hr<SUP>-1</SUP>), which was equal to or greater than the photosynthetic rate of phytoplankton at that same time. The photosynthetic activity of microphytobenthos (average 1.5 mg C mg chl a<SUP>-1</SUP> hr<SUP>-1</SUP>) was lower than that of phytoplankton (average 2.3 mg C mg chl a<SUP>-1</SUP> hr<SUP>-1</SUP>). During the observation period, the chlorophyll a concentration, photosynthetic rate and photosynthetic activity of phytoplankton dropped with decreasing water temperature, whereas those of microphytobenthos were almost unchanged. From these results, it was considered that microphytobenthos, particularly in winter, greatly contributed to primary production at the Wakaura tidal flat due to the large amount of biomass, though the growth rate of microphytobenthos was small.
- 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