华北水利水电大学学报（自然科学版）2025，Vol.46Issue(4)：30-36,7.DOI:10.19760/j.ncwu.zk.2025055
流速对梅尼小环藻细胞生长的影响机理
Effect of Flow Velocity on Cell Growth and Mechanism Analysis of Cyclotella meneghiniana
摘要
Abstract
[Objective]Flow velocity is a significant factor influencing algal cell growth and represents an optimal environ-mental control factor for suppressing algal proliferation based on hydrodynamic principles.Revealing the growth patterns and influencing mechanisms of Cyclotella meneghiniana under different flow velocity conditions is of great significance for preven-ting algal blooms and exploring the mechanisms of phytoplankton growth under hydrodynamic stress.[Methods]This study selected Cyclotella meneghiniana cells,the dominant diatoms in the Henan section of the Middle Route of the South-to-North Water Transfer Project,as the research object.A flow velocity gradient environment ranging from 0.0 to 1.0 m/s was simula-ted using self-made experimental devices.By measuring algal cell density,specific growth rate,photosynthetic pigment con-tent,alkaline phosphatase activity,and other indicators,the growth patterns and influencing mechanisms of Cyclotella me-neghiniana under different flow rates were analyzed.[Results]Under the experimental conditions,the critical flow velocity of cells was 0.4 m/s,and its growth exhibited a"low promotion and high inhibition"pattern under different flow environments.At low flow velocity(0.0-0.4 m/s),increased contact frequency between algal cells and nutrients promoted the absorption of nutrients by algal cells.At high flow velocity(0.6-1.0 m/s),fluid shear stress caused varying degrees of mechanical damage to the cell structure,thereby inhibiting algal cell growth.[Conclusion]Flow velocity has a dual effect on the growth of Cyclotella meneghiniana cells;the critical flow velocity is closely related to the cells' structural tolerance.关键词
流速/梅尼小环藻/影响机理/水动力学Key words
flow velocity/Cyclotella meneghiniana/influencing mechanism/hydrodynamics分类
资源环境引用本文复制引用
张建伟,马洪东,宋刚福,周子俊,郭思彤,张传普..流速对梅尼小环藻细胞生长的影响机理[J].华北水利水电大学学报（自然科学版）,2025,46(4):30-36,7.基金项目
国家自然科学基金项目(42407320) （42407320）
河南省科技攻关项目(222102320023). （222102320023）
