| 摘要: |
| 根据2007 年6 月期间对大连湾的调查数据, 分析了脱镁叶绿素对浮游植物吸收特性的影响。由实测数据及相关文献推断出脱镁叶绿素蓝光和红光吸收峰分别位于412 和670nm 波段, 并采用多元线性回归对脱镁叶绿素和叶绿素a 的比吸收系数进行研究。结果表明, 412nm 波段脱镁叶绿素的比吸收系数远大于叶绿素a; 440nm 波段, 叶绿素a 的比吸收系数略大于脱镁叶绿素; 670、675nm波段, 叶绿素a 的比吸收系数约为脱镁叶绿素的3 倍。随脱镁叶
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| 关键词: 脱镁叶绿素, 浮游植物, 叶绿素a, 吸收系数, 比吸收系数 |
| DOI：10.11693/hyhz200905012012 |
| 分类号: |
| 基金项目:908 专项资助项目, 908-02-03-01 号; 国家自然科学基金资助项目, 40876091 号; 海洋公益性行业科研专项资助项目, 2009-Z-02号 |
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| THE EFFECTS OF PHEOPHYTIN ON ABSORPTION CHARACTERISTICS OF PHYTOPLANKTON |
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WANG Lin1, ZHAO Dong-Zhi2, XING Xiao-Gang3, YANG Jian-Hong2, FU Yun-Na2
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1.National Marine Environmental Monitoring Center, College of Environment Engineering, Dalian Maritime University;2.National Marine Environmental Monitoring Center;3.National Marine Environmental Monitoring Center, Institute of Physical Oceanography, Ocean University of China
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| Abstract: |
| The survey data obtained in the Dalian Bay, June 2007 were studied for the relationship between pheophytin and phytoplankton absorption. This and previous studies have shown that pheophytin absorption peaks appears at 412nm in the violet region of spectrum, and 670nm in the red. The multivariate linear regression analysis on specific absorption coefficients for pheophytin and chlorophyll a indicates that the specific absorption coefficients for pheophytin was much larger than chlorophyll a at 412nm; slightly larger than pheophytin at 440nm; and about 3 times larger than pheophytin at 670nm and 675nm. While the proportion of pheophytin in total pigment concentration increased, the absorption peak in the blue region of spectrum deviated from 440nm to near 412nm. The absorption peak height in the blue region was mainly influenced by pheophytin concentration, whereas the height in the red was decided more by chlorophyll a concentration. Fitting analysis with a power function for the pigment concentration and absorption coefficient showed that the absorption coefficients at 412nm and 440nm exhibited higher correlation with pheophytin concentration than chlorophyll a, but contrary at 675nm.
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| Key words: Pheophytin, Phytoplankton, Chlorophyll-a, Absorption coefficient, Specific absorption coefficient |
