光照强度对铜绿微囊藻(Microcystis aeruginosa)和斜生栅藻(Scenedesmus obliqnus)生长及吸收特性的影响
光照强度对铜绿微囊藻(Microcystis aeruginosa)和斜生栅藻(Scenedesmus obliqnus)生长及吸收特性的影响
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DOI：
10.18307/2012.0517
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
时志强
中科院分区：
文献类型：
--
作者：
殷燕;张运林;王明珠;刘笑菡;时志强
细胞数量、细胞大小、叶绿素a在3种不同的光照强度下，测定了铜绿微囊藻（Microcystis aeruginosa）和斜生栅藻（Scenedesmus obliqnus）在不同培养时间的叶绿素a浓度、吸收系数和比吸收系数，单因素方差分析表明，光照强度对细胞数、叶绿素a浓度和浮游植物在440 nm aph（440）处的吸收系数有极显著影响，结果表明，在整个实验周期内，675 nm的aph（675）均在50 μmol/（m2·s）的光照条件下达到最大值。浮游植物需要最佳的生长光照强度，过低或过高的光照强度都会对浮游植物的生长速率产生不利影响。相关性分析表明，aph（440）、aphh（440）、aphh（675）与叶绿素a浓度之间的相关性可用幂相关来描述，aphh（440）、aphh（675）与叶绿素a浓度之间的相关性可用线性相关来描述，同时铜绿微囊藻和斜生链球菌的比吸收系数在不同的辐照强度和不同的实验时间段内都有较小的波动，铜绿微囊藻在440 nm和675 nm处的比吸收系数与叶绿素a浓度呈显著负相关，斜生梭子蟹的比吸收系数与叶绿素a浓度无关，主要是由于色素的组成和比例以及包装效应，平均比吸收系数在PAR范围内积分在5，50，100 μmol/（m2·s）三种辐照强度下，铜绿微囊藻和斜生链球菌的荧光强度分别为0.0144，0.0134，0.0160和0.0086，0.0088，0.0105 m2/铜绿微囊藻的比吸收系数显著高于斜生栅藻，这主要是由于铜绿微囊藻的藻细胞大小（3. 14 ± 0. 43 μm）比斜生栅藻的藻细胞大小（7. 24 ± 0. 79 μm）小2倍所致。
Cell number,cell size,chlorophyll-a(Chl.a) concentration,absorption and specific absorption coefficients of Microcystis aeruginosa and Scenedesmus obliqnus were determined in the different culture times at three different irradiation intensities.One-way analysis of variance showed that irradiation intensity had great significant effects on cell number,Chl.a concentration and phytoplankton absorption coefficients at 440 nm aph(440),675 nm aph(675) in the entire experimental period.The largest values of these parameters were recorded in the light condition with 50 μmol/(m2·s).Phytoplankton needs optimal growth irradiation intensity because over-low or high light density could have negative effects on the growth rate of phytoplankton.Correlation analysis showed that there were significant positive correlations between aph(440),aph(675) and Chl.a concentration under three different irradiation intensities for M.aeruginosa and S.obliqnus.Power correlation could be best used to describe the correlations between aph(440),aph(675) and Chl.a concentration,while the linear correlation could be used to explain the relationships between aph(440),aph(675) and cell number.Meanwhile the specific absorption coefficients of M.aeruginosa and S.obliqnus fluctuated within small range in different irradiation intensities at different experimental periods,and increased with increasing irradiation intensity.A significant negative relationship was found between M.aeruginosa specific absorption coefficients at 440 nm,675 nm and Chl.a concentration.However,the specific absorption coefficients of S.obliqnus had no relationship with Chl.a concentration mainly due to the composition and proportion of pigments and package effects.The average specific absorption coefficient integrated over the range of PAR(400-700 nm) of M.aeruginosa and S.obliqnus at three irradiation intensities of 5,50,100 μmol/(m2·s) are 0.0144,0.0134,0.0160 and 0.0086,0.0088,0.0105 m2/(mg Chl.a),respectively.The specific absorption coefficients of M.aeruginosa were significantly higher than those of S.obliqnus mainly due to the algae cell size of M.aeruginosa,3.14±0.43 μm,twice smaller than that of S.obliqnus,7.24±0.79 μm.
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DOI：
10.1007/s00254-008-1277-1
发表时间：
2009-03
期刊：
Environmental Geology
影响因子：
--
作者：
H. Weng;Ya-Chao Qin;Xiang-wei Sun;Xunhong Chen;J. Chen
通讯作者：
H. Weng;Ya-Chao Qin;Xiang-wei Sun;Xunhong Chen;J. Chen
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影响因子：
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作者：
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影响因子：
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通讯作者：
S. Simis;A. Ruiz-Verdú;J. Domínguez-Gómez;Ramón Peña-Martínez;S. Peters;H. Gons
影响因子：
2.6
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通讯作者：
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