Phytoplankton growth response to deep ocean water
- 標題
- Phytoplankton growth response to deep ocean water
- 作者
- Kenneth L. Terry, John Caperon
- 文件屬性
- 國外期刊
- 知識分類
- 基礎研究
- 出版年
- 1982
- 刊名
- Marine Environmental Research
- 點閱數
- 2810
摘要
Single species populations and natural populations of phytoplankton were grown in mixtures of surface sea water and deep ocean water. The yields of Phaeodactylum tricornutum and the natural species assemblages were positively correlated with the percentage of deep water in the mixture. Single species populations of Thalassiosira weissflogii and Amphidinum sp. showed yields which were positively correlated with per cent deep water at low deep water concentrations and negatively correlated at high deep water concentrations. Transition from the positive to the negative slope occurred at about 75% deep water for T. weissflogii and at about 25% deep water for Amphidinium. Populations were apparently limited by an inorganic nutrient, probably nitrogen, in the region of positive slope and by some other factor, probably organic, in the region of negative slope. The addition of EDTA increased the yields of T. weissflogii and Amphidinium in the presence of deep water and reduced lag times in the growth of the natural populations.