Phytoplankton community adaptation to changing light levels in the southern Beaufort Sea, Canadian Arctic
Phytoplankton community adaptation to changing light levels in the southern Beaufort Sea, Canadian Arctic
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DOI：
10.1016/j.ecss.2009.02.024
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发表时间：
2009-04
影响因子：
2.8
通讯作者：
A. Matsuoka;P. Larouche;M. Poulin;W. Vincent;H. Hattori
中科院分区：
文献类型：
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作者：
A. Matsuoka;P. Larouche;M. Poulin;W. Vincent;H. Hattori
浮游植物叶绿素a的比吸收系数aφ_（λ）是建立初级生产力模型和估算浮游植物生理状况的重要参数。在高纬度地区，营养丰富的冷水提交到低入射光是一个共同的环境，这个参数的知识几乎是不存在的。为了解决这个问题，我们调查了浮游植物的光吸收特性作为辐照度，温度和营养物质的函数，在南部博福特海在开放水域冰盖过渡期的大型数据集。从秋季开放水域存在到初冬海冰覆盖形成，aφ_（λ）呈增加趋势，这是由于生物选择较小的浮游植物更有效地吸收光。在两个季节中，φ_（λ）与辐照度和温度之间均无显著相关性。而a φ（λ）与NO3+NO2呈显著正相关。浮游植物群落适应不断变化的光照水平的结果的影响进行了讨论。
The chlorophyll a specific absorption coefficient of phytoplankton, aφ∗(λ) is an important parameter to determine for primary production models and for the estimation of phytoplankton physiological condition. Knowledge of this parameter at high latitudes where nutrient rich cold water submitted to low incident light is a common environment is almost nonexistent. To address this issue, we investigated the light absorption properties of phytoplankton as a function of irradiance, temperature, and nutrients using a large data set in the southern Beaufort Sea during the open water to ice cover transition period. The aφ∗(λ) tended to increase from autumn when open water still existed to early winter when sea ice cover was formed, resulting from a biological selection of smaller-size phytoplankton more efficient to absorb light. There was no significant correlation between aφ∗(λ) and irradiance or temperature for both seasons. However, aφ∗(λ) showed a significant positive correlation with NO3+NO2. Implications of the results for phytoplankton community adaptation to changing light levels are discussed.