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生态学杂志 ›› 2022, Vol. 41 ›› Issue (7): 1385-1390.doi: 10.13292/j.1000-4890.202207.014

• 研究报告 • 上一篇    下一篇

流速对梅尼小环藻生长与光合活性的影响

李波1,2,张羽珩3,邓睿4,朱宇轩2,宋高飞2,米武娟2,毕永红2*   

  1. 1大连海洋大学水产与生命学院, 辽宁大连 116023; 2中国科学院水生生物研究所, 淡水生态与生物技术国家重点实验室, 武汉 430072;3湖北师范大学生命科学学院, 湖北黄石 435002;4新疆师范大学生命科学学院, 乌鲁木齐 830000)
  • 出版日期:2022-07-10 发布日期:2022-07-08

Effects of water velocity on the growth and photosynthetic activity of Cyclotella meneghiniana (diatom).

LI Bo1,2, ZHANG Yu-heng3, DENG Rui4, ZHU Yu-xuan2, SONG Gao-fei2, MI Wu-juan2, BI Yong-hong2*   

  1. (1School of Fisheries and Life Science, Dalian Ocean University, Dalian 116023, Liaoning, China; 2State Key Laboratory of Fresh Water Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; 3The College of Life and Sciences, Hubei Normal University, Huangshi 435002, Hubei, China; 4School of Life Sciences, Xinjiang Normal University, Urumqi 830000, China).
  • Online:2022-07-10 Published:2022-07-08

摘要: 为探究流速对硅藻生长增殖的影响,以南水北调中线干渠的常见硅藻优势种梅尼小环藻为对象,测定不同流速培养下该藻的比生长速率、营养摄取、光合色素、光系统II(PSII)活性以及碱性磷酸酶(APA)活性。结果表明:低流速(0.3 m·s-1)促进藻细胞的生长与营养摄取,提高光合色素含量、PSII活性以及APA活性;高流速(>0.5 m·s-1)抑制藻细胞的生长与营养盐摄取,降低光合色素含量、PSII活性以及APA活性,流速越高抑制效应越明显;与其他流速相比,1.0 m·s-1的流速对藻细胞生长的抑制效果极显著(P<0.01),光系统II活性最低,该流速可作为抑制硅藻细胞生长增殖的参考流速。本研究结果可为通过流速调控抑制中线干渠硅藻生长增殖提供依据。

关键词: 流速, 南水北调中线干渠, 梅尼小环藻, 生长, 光合活性

Abstract: In order to clarify the effects of water velocity on the growth of diatoms in the middle route of South to North Water Diversion Project, we examined specific growth rate, nutrient uptake, photosynthetic pigment, the activity of photosynthetic system II (PSII) of algal cells and alkaline phosphatase activity of the dominant species Cyclotella meneghiniana under different water velocity in microcosm experiments. The results showed that low water velocity (0.3 m·s-1) could promote the growth and nutrient uptake of C. meneghiniana, photosynthetic pigment content, the PSII activity and alkaline phosphatase activity. High water velocity (>0.5 m·s-1) inhibited the growth and nutrient uptake, and reduced the photosynthetic pigment content, PSII activity, and alkaline phosphatase activity. The higher the flow velocity, the stronger of the inhibition effect. Compared with other flow velocity, the flow velocity of 1.0 m·s-1 showed significant inhibitory effects on growth of algae cells and the photosystem II activity (P<0.01). Such a water velocity could be used as the threshold of water velocity for inhibiting the proliferation of diatoms. The results provided a basis for controlling the growth of diatom through water velocity regulation in the SouthtoNorth Water Diversion Project.

Key words: water velocity, middle route of the SouthtoNorth Water Diversion Project, Cyclotella meneghiniana, growth, photosynthetic activity.