生态与农村环境学报2024，Vol.40Issue(4)：513-520,8.DOI:10.19741/j.issn.1673-4831.2023.0323
基于藻类生长潜力评估调水对藻类生长的影响
Assessment of Water Transfer Effects on Algal Growth Based on Algal Growth Potential
摘要
Abstract
Currently,the water supply source is complex,and the trend of water quality changes in the receiving reservoir is unclear.To evaluate the ecological health of the water body,it is important to quantify and determine the impact of the phytoplankton community in the water supply on the growth of phytoplankton in the receiving water.In this study,the physic-chemical factors of the water in the supply and receiving reservoirs were measured during different seasons of water transfer period.The changes in cell density and community structure of phytoplankton in the mixed water treatment of dif-ferent ratios of the supply and receiving water were compared and analyzed by using the algae growth potential test.The re-sults show that the concentrations of nitrogen and phosphorus nutrients in the receiving reservoir did not change significantly during the water transfer period(P>0.05).The algae growth potential tests conducted in different seasons showed that the peak time of phytoplankton cell density in the treatment groups of summer and winter was 4 days earlier than that in the control group,and the peak density increased with the increase of the mixing ratio.However,the density of phytoplankton in the treatment group in the end of the summer cultivation period(20 days)was lower than that in the con-trol group.Additionally,the actual peak density of phytoplankton in the treatment groups in summer,autumn and winter was 10%,17%-24%,and 31%lower than the theoretically estimated value,respectively.The changes in community structure in the treatment group show that the absolute dominant species in the receiving reservoir during summer was re-placed by the dominant species in the input water,and the relative abundance of the dominant species in autumn and win-ter increased with the increase of the water mixing ratio,indicating that they were significantly affected by the growth of the dominant species in the supply water.Overall,the difference in nutrient concentrations between the supply and receiving water bodies is the main factor affecting the growth of phytoplankton.Continuous water transfer significantly affects the community structure of phytoplankton in the receiving water body but also reduces the risk of algal blooms to some extent.关键词
调水/理化因子/浮游藻类/群落结构/藻类生长潜力试验Key words
water transfer/physic-chemical factors/phytoplankton/community structure/algal growth potential test分类
资源环境引用本文复制引用
薛立阳,赵恕轲,胡俊杰,裴国凤,张烨..基于藻类生长潜力评估调水对藻类生长的影响[J].生态与农村环境学报,2024,40(4):513-520,8.基金项目
国家自然科学基金面上项目(30970550) （30970550）
