Effect of time of day on the recovery from light exposure in ice algae from Saroma Ko lagoon, Hokkaido
Effect of time of day on the recovery from light exposure in ice algae from Saroma Ko lagoon, Hokkaido
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一天中的时间对北海道 Saroma Ko 泻湖冰藻光暴露恢复的影响
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
H. Hattori
中科院分区：
文献类型：
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作者：
A. McMinn;H. Hattori
藻类群落之前接受的光照量可能决定其从强光照射中恢复的能力。在这里，我们研究了一天中的时间和光线对冰藻从可变光照中恢复的能力的影响。冰藻取自萨罗马科泻湖，这是一个温带、常年生长的泻湖。
日本北海道北部冰雪覆盖的泻湖。在冰下，辐照度在 0 到 122 μmol 光子 m−2s−1 之间变化。以冷菱形藻为主的藻类生物量为 272.8±20.2 mg Chl a m−2。环境原位辐照度和恢复率之间没有一致的关系。虽然海冰群落在使用的最高辐照度（490 μmol 光子 m−2s−1）下表现出轻度抑制，但 10 分钟后，量子产率已恢复到原始测量值的 90.9% 至 112%（平均 99.5%）。很可能是这样
萨罗马科泻湖冰辐照度下的环境永远不足以引起光抑制，因此对光生理学几乎没有负面的长期影响。快速光曲线在提供足够强度的辐照度以引起抑制的同时，
持续时间太短，只能产生短暂的、短暂的影响。因此，尚不清楚较高的原位辐照度是否需要更长的恢复时间。
The amount of prior light exposure an algal community receives is likely to determine its ability to recover from exposure to high light levels. Here we investigate the effect of time of day and light on the ability of ice algae to recover from variable light exposure. The ice algae were obtained from Saroma Ko lagoon, a temperate, perennially
ice covered lagoon in northern Hokkaido, Japan. Under ice irradiance varied between 0 and 122 μmol photons m−2s−1. Algal biomass, which was dominated by Nitzschia frigida, was 272.8±20.2 mg Chl a m−2. There was no consistent relationship between ambient in situ irradiance and recovery rates. While the sea ice community showed mild inhibition at the highest irradiance used, 490 μmol photons m−2s−1, after 10 min the quantum yield had recovered to between 90.9% and 112% (average 99.5%) of the original measurement. It is likely that
ambient under ice irradiances at Saroma Ko lagoon were never sufficient to cause photoinhibition and consequently had little negative long term effect on photophysiology. The Rapid Light Curves, while providing irradiances of sufficient intensity to cause inhibition,
were of too short a duration to cause anything but a short, transient effect. Therefore, it is unclear whether higher in situ irradiances would necessitate a longer period of recovery.