Photosynthesis of natural phytoplankton under high frequency light fluctuations simulating those induced by sea surface waves1
Photosynthesis of natural phytoplankton under high frequency light fluctuations simulating those induced by sea surface waves1
复制标题
模拟海面波浪引起的高频光波动下天然浮游植物的光合作用1
DOI：
--
复制
发表时间：
1983
期刊：
影响因子：
--
通讯作者：
L. Legendre
中科院分区：
文献类型：
--
作者：
P. Walsh;L. Legendre
在各种人造光条件下，结合不同的强度、颜色和高频波动，测量了圣劳伦斯河口浮游植物的光合 14C 同化。光波动由相同持续时间的高光强度和低光强度的快速交替组成。在第一组实验中，在稳定或波动（2.5 Hz）的红光、绿光、蓝光和白光下测量光合反应。波动光下，彩色：白色14C同化比显着高于稳定光下。在第二组实验中，在波动光（10 Hz）和稳定光下绘制光饱和曲线。 PBmax 没有记录到差异，但在波动光下光合效率 α 高出 30%。因此，快速光波动的垂直分布以及光强度和颜色具有生态意义。这些实验还提出了甲板孵化的问题，其中不仅改变了颜色，还改变了光波动的频率，导致中值误差高达 30%。
The photosynthetic 14C assimilation of phytoplankton from the St. Lawrence estuary was measured under various artificial light regimes, combining different intensities, colors, and high frequency fluctuations. The light fluctuations consisted of rapid alternation of high and low light intensities of equal duration. In the first set of experiments, the photosynthetic response was measured under red, green, blue, and white light, steady or fluctuating (2.5 Hz). Under fluctuating light, the color: white 14C assimilation ratios were significantly higher than those under steady light. In the second set of experiments, light saturation curves were made under fluctuating (10 Hz) and steady lights. No differences were recorded for PBmax but the photosynthetic efficiencies α were 30% higher under fluctuating light. Vertical distribution of rapid light fluctuations, together with light intensities and color, is therefore of ecological significance. These experiments also raise the problem of deck incubations, where not only the color is modified but also the frequency of light fluctuations, leading to a median error as high as 30%.