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当前位置: 首页 > 文章 > 光强对萱藻孢子萌发、幼苗早期发育及附生藻类动态变化的影响 水产学报 2014,38 (12) 2018-2028
Position: Home > Articles > Effects of light intensity on spore germination,early development of the sporelings of Scytosiphon lomentaria and the dynamic change of epiphytic algae Journal of Fisheries of China 2014,38 (12) 2018-2028

光强对萱藻孢子萌发、幼苗早期发育及附生藻类动态变化的影响

作  者：
罗伟;宫相忠;高伟;夏云捷;张必达
单  位：
中国海洋大学海洋生命学院;长岛爱华海藻食品有限公司
关键词：
萱藻;孢子萌发;幼苗;附生藻类;光照强度
摘  要：
模拟萱藻育苗条件,以萱藻丝状体为材料,沙滤天然海水作为培养液,研究了光照强度[7.2~126.0μmol/(m2·s)]对萱藻孢子萌发、幼苗早期发育及附生藻类动态变化的影响。结果显示:(1)本实验条件下,萱藻孢子萌发的适宜光强范围为27.0~72.0μmol/(m2·s)。其中,在45.0μmol/(m2·s)条件下,萱藻孢子萌发率较高,并在放散后的第16天萌发率达到(44.44%±11.00%);(2)在本实验条件下,萱藻幼苗早期生长的适宜光强范围为36.0~54.0μmol/(m2·s),其中45.0μmol/(m2·s)最适宜萱藻幼苗的生长,且附生藻类密度最低,孢子放散后第34天附生藻类密度为(38.4±0.6)×104个/cm2;(3)本研究共鉴定出附生藻类2门13属29种,主要优势种为碎片菱形藻、小伪菱形藻、艳绿颤藻、膨胀色球藻、耳形藻和新月菱形藻。其中碎片菱形藻在7.2~18.0μmol/(m2·s)条件下呈指数增长,而耳形藻与新月菱形藻在27.0~126.0μmol/(m2·s)条件下呈指数增长。研究表明,萱藻孢子萌发和幼苗早期发育的最佳光强为45.0μmol/(m2·s),且在萱藻育苗过程中应重点防治的附生藻类为耳形藻与新月菱形藻。
译  名：
Effects of light intensity on spore germination,early development of the sporelings of Scytosiphon lomentaria and the dynamic change of epiphytic algae
作  者：
LUO Wei;GONG Xiangzhong;GAO Wei;XIA Yunjie;ZHANG Bida;College of Marine Life Sciences,Ocean University of China;Changdao Aihua Seaweed Foodstuff Co. ,Ltd.;
关键词：
Scytosiphon lomentaria;;spore germination;;sporelings;;epiphytic algae;;light intensity
摘  要：
In this research,by using experimental ecology to imitate the culture conditions of sporelings of Scytosiphon lomentaria,the filaments of S. lomentaria and the natural sand filtered seawater were used as the experimental material and the culture solution,respectively. Different light intensity which includes 7. 2,18. 0,27. 0,36. 0,45. 0,54. 0,72. 0,127. 0 μmol /( m2·s) were set to study the effect of light intensity7. 2- 126. 0 μmol /( m2·s) on spore germination,early development of sporelings of S. lomentaria and the dynamic change of epiphytic algae. The results indicated that:( 1) 27. 0- 72. 0 μmol /( m2·s) was the appropriate light intensity range for the spore germination of S. lomentaria,and the spore germination rate reached the maximum under the condition of 45. 0 μmol /( m2·s),the germination rate was 44. 44% after16 days of the spores releasing.( 2) In the natural sand filtered seawater,36. 0- 54. 0 μmol /( m2·s) was the appropriate light intensity range for the early development of sporelings,and the optimal light intensity was45. 0 μmol /( m2·s),under whose condition the epiphytic algae density was the lowest and the epiphytic algae density was 38. 4 × 104 ind / cm2 after 34 days of the spores releasing.( 3) In this study,a total of 29 taxa which belong to 13 genera of 2 phyla were identified,and the main dominant species were Nitzschia frustulum,Pseudo-Nitzschia sicula,Oscillatoria laetevirens,Chroococcus turgidus,Auricula sp. and Nitzschia closterium. Nitzschia frustulum showed exponential growth trend under the condition of 7. 2- 18 μmol /( m2·s),while Auricula sp. and N. closterium presented exponential growth trend under the condition of 27. 0- 126. 0 μmol /( m2·s). In conclusion,45. 0 μmol/( m2·s) was the optimal light intensity for spore germination and early development of sporelings of S. lomentaria. The epiphytic algae,which should be controlled in the process of sporelings production,were Auricula sp. and N. closterium.

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